diff --git a/pkgs/applications/science/biology/macs2/default.nix b/pkgs/applications/science/biology/macs2/default.nix
index 73f12af6a605..26ec138048f7 100644
--- a/pkgs/applications/science/biology/macs2/default.nix
+++ b/pkgs/applications/science/biology/macs2/default.nix
@@ -21,7 +21,7 @@ python3.pkgs.buildPythonPackage rec {
   ];
 
   nativeBuildInputs = with python3.pkgs; [
-    cython
+    cython_0
     numpy
     setuptools
     wheel
diff --git a/pkgs/applications/science/math/sage/python-modules/sage-setup.nix b/pkgs/applications/science/math/sage/python-modules/sage-setup.nix
index a96f7ccd5d4c..e1c497678d50 100644
--- a/pkgs/applications/science/math/sage/python-modules/sage-setup.nix
+++ b/pkgs/applications/science/math/sage/python-modules/sage-setup.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , sage-src
-, cython_3
+, cython
 , jinja2
 , pkgconfig # the python module, not the pkg-config alias
 }:
@@ -11,7 +11,7 @@ buildPythonPackage rec {
   pname = "sage-setup";
   src = sage-src;
 
-  nativeBuildInputs = [ cython_3 ];
+  nativeBuildInputs = [ cython ];
   buildInputs = [ pkgconfig ];
   propagatedBuildInputs = [ jinja2 ];
 
diff --git a/pkgs/applications/science/math/sage/sagelib.nix b/pkgs/applications/science/math/sage/sagelib.nix
index b67b74e3a0f2..0a2bd8011b0b 100644
--- a/pkgs/applications/science/math/sage/sagelib.nix
+++ b/pkgs/applications/science/math/sage/sagelib.nix
@@ -48,7 +48,7 @@
 , cvxopt
 , cypari2
 , cysignals
-, cython_3
+, cython
 , fpylll
 , gmpy2
 , importlib-metadata
@@ -153,7 +153,7 @@ buildPythonPackage rec {
     cvxopt
     cypari2
     cysignals
-    cython_3
+    cython
     fpylll
     gmpy2
     importlib-metadata
diff --git a/pkgs/development/python-modules/aioesphomeapi/default.nix b/pkgs/development/python-modules/aioesphomeapi/default.nix
index c17f2df97fa2..c3a77eb76754 100644
--- a/pkgs/development/python-modules/aioesphomeapi/default.nix
+++ b/pkgs/development/python-modules/aioesphomeapi/default.nix
@@ -4,7 +4,7 @@
 , pythonOlder
 
 # build-system
-, cython_3
+, cython
 , setuptools
 
 # dependencies
@@ -39,7 +39,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     setuptools
-    cython_3
+    cython
   ];
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/astropy/default.nix b/pkgs/development/python-modules/astropy/default.nix
index d770eb196a28..eb391ab1ae00 100644
--- a/pkgs/development/python-modules/astropy/default.nix
+++ b/pkgs/development/python-modules/astropy/default.nix
@@ -5,7 +5,7 @@
 
 # build time
 , astropy-extension-helpers
-, cython_3
+, cython
 , jinja2
 , oldest-supported-numpy
 , setuptools-scm
@@ -37,7 +37,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     astropy-extension-helpers
-    cython_3
+    cython
     jinja2
     oldest-supported-numpy
     setuptools-scm
diff --git a/pkgs/development/python-modules/blis/default.nix b/pkgs/development/python-modules/blis/default.nix
index eec563c79a9d..8b465bcebdc1 100644
--- a/pkgs/development/python-modules/blis/default.nix
+++ b/pkgs/development/python-modules/blis/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , setuptools
-, cython
+, cython_0
 , hypothesis
 , numpy
 , pytestCheckHook
@@ -38,7 +38,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     setuptools
-    cython
+    cython_0
   ];
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/blosc2/default.nix b/pkgs/development/python-modules/blosc2/default.nix
index d960139a7d6e..efaec4ead713 100644
--- a/pkgs/development/python-modules/blosc2/default.nix
+++ b/pkgs/development/python-modules/blosc2/default.nix
@@ -4,7 +4,7 @@
 
 # build-system
 , cmake
-, cython_3
+, cython
 , ninja
 , oldest-supported-numpy
 , pkg-config
@@ -47,7 +47,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     cmake
-    cython_3
+    cython
     ninja
     oldest-supported-numpy
     pkg-config
diff --git a/pkgs/development/python-modules/bluetooth-data-tools/default.nix b/pkgs/development/python-modules/bluetooth-data-tools/default.nix
index 95d6207de10a..fbaf458be3f3 100644
--- a/pkgs/development/python-modules/bluetooth-data-tools/default.nix
+++ b/pkgs/development/python-modules/bluetooth-data-tools/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , cryptography
-, cython_3
+, cython
 , poetry-core
 , pytestCheckHook
 , pythonOlder
@@ -28,7 +28,7 @@ buildPythonPackage rec {
   env.REQUIRE_CYTHON = 1;
 
   nativeBuildInputs = [
-    cython_3
+    cython
     poetry-core
     setuptools
   ];
diff --git a/pkgs/development/python-modules/cached-ipaddress/default.nix b/pkgs/development/python-modules/cached-ipaddress/default.nix
index c4d29b98bd76..5e4781ec7503 100644
--- a/pkgs/development/python-modules/cached-ipaddress/default.nix
+++ b/pkgs/development/python-modules/cached-ipaddress/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython_3
+, cython
 , fetchFromGitHub
 , poetry-core
 , pytestCheckHook
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     poetry-core
     setuptools
     wheel
diff --git a/pkgs/development/python-modules/cassandra-driver/default.nix b/pkgs/development/python-modules/cassandra-driver/default.nix
index e985ed544d3c..8c05e5e0bbb6 100644
--- a/pkgs/development/python-modules/cassandra-driver/default.nix
+++ b/pkgs/development/python-modules/cassandra-driver/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , buildPythonPackage
 , cryptography
-, cython
+, cython_0
 , eventlet
 , fetchFromGitHub
 , geomet
@@ -43,7 +43,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython
+    cython_0
   ];
 
   buildInputs = [
diff --git a/pkgs/development/python-modules/chacha20poly1305-reuseable/default.nix b/pkgs/development/python-modules/chacha20poly1305-reuseable/default.nix
index dbab53868f66..429467d65e30 100644
--- a/pkgs/development/python-modules/chacha20poly1305-reuseable/default.nix
+++ b/pkgs/development/python-modules/chacha20poly1305-reuseable/default.nix
@@ -4,7 +4,7 @@
 , pythonOlder
 
 # build-system
-, cython_3
+, cython
 , poetry-core
 , setuptools
 
@@ -34,7 +34,7 @@ buildPythonPackage {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     poetry-core
     setuptools
   ];
diff --git a/pkgs/development/python-modules/clickhouse-cityhash/default.nix b/pkgs/development/python-modules/clickhouse-cityhash/default.nix
index d8fad65bef0d..ecb3f3bf290e 100644
--- a/pkgs/development/python-modules/clickhouse-cityhash/default.nix
+++ b/pkgs/development/python-modules/clickhouse-cityhash/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython_3
+, cython
 , fetchPypi
 , pythonOlder
 , setuptools
@@ -19,7 +19,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/clickhouse-connect/default.nix b/pkgs/development/python-modules/clickhouse-connect/default.nix
index 277216a3f968..58831fb4bef8 100644
--- a/pkgs/development/python-modules/clickhouse-connect/default.nix
+++ b/pkgs/development/python-modules/clickhouse-connect/default.nix
@@ -4,7 +4,7 @@
 , pythonOlder
 , pytestCheckHook
   # build_requires
-, cython_3
+, cython
   # install_requires
 , certifi
 , importlib-metadata
@@ -36,7 +36,7 @@ buildPythonPackage rec {
     hash = "sha256-YEtcM9+GO8mYv2pyaBYmXdmWLXVuteKtQIJR4H+Xsd4=";
   };
 
-  nativeBuildInputs = [ cython_3 ];
+  nativeBuildInputs = [ cython ];
   setupPyBuildFlags = [ "--inplace" ];
   enableParallelBuilding = true;
 
diff --git a/pkgs/development/python-modules/clickhouse-driver/default.nix b/pkgs/development/python-modules/clickhouse-driver/default.nix
index 716914b3caee..1ddaa5398d9d 100644
--- a/pkgs/development/python-modules/clickhouse-driver/default.nix
+++ b/pkgs/development/python-modules/clickhouse-driver/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , clickhouse-cityhash
-, cython_3
+, cython
 , fetchFromGitHub
 , freezegun
 , lz4
@@ -29,7 +29,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/cpyparsing/default.nix b/pkgs/development/python-modules/cpyparsing/default.nix
index c475652799ea..e063e8847d43 100644
--- a/pkgs/development/python-modules/cpyparsing/default.nix
+++ b/pkgs/development/python-modules/cpyparsing/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
-, cython_3
+, cython
 , pexpect
 , python
 , pythonOlder
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/cypari2/default.nix b/pkgs/development/python-modules/cypari2/default.nix
index f93e04629728..025692de1f74 100644
--- a/pkgs/development/python-modules/cypari2/default.nix
+++ b/pkgs/development/python-modules/cypari2/default.nix
@@ -5,7 +5,7 @@
 , fetchPypi
 , pari
 , gmp
-, cython_3
+, cython
 , cysignals
 }:
 
@@ -45,7 +45,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     cysignals
-    cython_3
+    cython
   ];
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/cysignals/default.nix b/pkgs/development/python-modules/cysignals/default.nix
index 107b552a631c..62cc3dd30d8a 100644
--- a/pkgs/development/python-modules/cysignals/default.nix
+++ b/pkgs/development/python-modules/cysignals/default.nix
@@ -2,7 +2,7 @@
 , autoreconfHook
 , fetchPypi
 , buildPythonPackage
-, cython_3
+, cython
 , pariSupport ? true, pari # for interfacing with the PARI/GP signal handler
 }:
 
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   '';
 
   propagatedBuildInputs = [
-    cython_3
+    cython
   ] ++ lib.optionals pariSupport [
     # When cysignals is built with pari, including cysignals into the
     # buildInputs of another python package will cause cython to link against
diff --git a/pkgs/development/python-modules/cython/0.nix b/pkgs/development/python-modules/cython/0.nix
new file mode 100644
index 000000000000..72ba4a68f038
--- /dev/null
+++ b/pkgs/development/python-modules/cython/0.nix
@@ -0,0 +1,91 @@
+{ lib
+, stdenv
+, buildPythonPackage
+, fetchPypi
+, fetchpatch
+, setuptools
+, python
+, pkg-config
+, gdb
+, numpy
+, ncurses
+}:
+
+let
+  excludedTests = [ "reimport_from_subinterpreter" ]
+    # cython's testsuite is not working very well with libc++
+    # We are however optimistic about things outside of testsuite still working
+    ++ lib.optionals (stdenv.cc.isClang or false) [ "cpdef_extern_func" "libcpp_algo" ]
+    # Some tests in the test suite isn't working on aarch64. Disable them for
+    # now until upstream finds a workaround.
+    # Upstream issue here: https://github.com/cython/cython/issues/2308
+    ++ lib.optionals stdenv.isAarch64 [ "numpy_memoryview" ]
+    ++ lib.optionals stdenv.isi686 [ "future_division" "overflow_check_longlong" ]
+  ;
+
+in buildPythonPackage rec {
+  pname = "cython";
+  version = "0.29.36";
+  pyproject = true;
+
+  src = fetchPypi {
+    pname = "Cython";
+    inherit version;
+    hash = "sha256-QcDP0tdU44PJ7rle/8mqSrhH0Ml0cHfd18Dctow7wB8=";
+  };
+
+  nativeBuildInputs = [
+    pkg-config
+    setuptools
+  ];
+
+  nativeCheckInputs = [
+    gdb numpy ncurses
+  ];
+
+  LC_ALL = "en_US.UTF-8";
+
+  patches = [
+    # backport Cython 3.0 trashcan support (https://github.com/cython/cython/pull/2842) to 0.X series.
+    # it does not affect Python code unless the code explicitly uses the feature.
+    # trashcan support is needed to avoid stack overflows during object deallocation in sage (https://trac.sagemath.org/ticket/27267)
+    ./trashcan.patch
+    # The above commit introduces custom trashcan macros, as well as
+    # compiler changes to use them in Cython-emitted code. The latter
+    # change is still useful, but the former has been upstreamed as of
+    # Python 3.8, and the patch below makes Cython use the upstream
+    # trashcan macros whenever available. This is needed for Python
+    # 3.11 support, because the API used in Cython's implementation
+    # changed: https://github.com/cython/cython/pull/4475
+    (fetchpatch {
+      name = "disable-trashcan.patch";
+      url = "https://github.com/cython/cython/commit/e337825cdcf5e94d38ba06a0cb0188e99ce0cc92.patch";
+      hash = "sha256-q0f63eetKrDpmP5Z4v8EuGxg26heSyp/62OYqhRoSso=";
+    })
+  ];
+
+  checkPhase = ''
+    export HOME="$NIX_BUILD_TOP"
+    ${python.interpreter} runtests.py -j$NIX_BUILD_CORES \
+      --no-code-style \
+      ${lib.optionalString (builtins.length excludedTests != 0)
+        ''--exclude="(${builtins.concatStringsSep "|" excludedTests})"''}
+  '';
+
+  # https://github.com/cython/cython/issues/2785
+  # Temporary solution
+  doCheck = false;
+  # doCheck = !stdenv.isDarwin;
+
+  # force regeneration of generated code in source distributions
+  # https://github.com/cython/cython/issues/5089
+  setupHook = ./setup-hook.sh;
+
+  meta = {
+    changelog = "https://github.com/cython/cython/blob/${version}/CHANGES.rst";
+    description = "An optimising static compiler for both the Python programming language and the extended Cython programming language";
+    homepage = "https://cython.org";
+    license = lib.licenses.asl20;
+    maintainers = with lib.maintainers; [ fridh ];
+  };
+}
diff --git a/pkgs/development/python-modules/cython/default.nix b/pkgs/development/python-modules/cython/default.nix
index 72ba4a68f038..4467dc3b459c 100644
--- a/pkgs/development/python-modules/cython/default.nix
+++ b/pkgs/development/python-modules/cython/default.nix
@@ -2,7 +2,6 @@
 , stdenv
 , buildPythonPackage
 , fetchPypi
-, fetchpatch
 , setuptools
 , python
 , pkg-config
@@ -25,16 +24,16 @@ let
 
 in buildPythonPackage rec {
   pname = "cython";
-  version = "0.29.36";
+  version = "3.0.9";
   pyproject = true;
 
   src = fetchPypi {
     pname = "Cython";
     inherit version;
-    hash = "sha256-QcDP0tdU44PJ7rle/8mqSrhH0Ml0cHfd18Dctow7wB8=";
+    hash = "sha256-otNU8FnR8FXTTPqmLFtovHisLOq2QHFI1H+1CM87pPM=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     pkg-config
     setuptools
   ];
@@ -43,26 +42,7 @@ in buildPythonPackage rec {
     gdb numpy ncurses
   ];
 
-  LC_ALL = "en_US.UTF-8";
-
-  patches = [
-    # backport Cython 3.0 trashcan support (https://github.com/cython/cython/pull/2842) to 0.X series.
-    # it does not affect Python code unless the code explicitly uses the feature.
-    # trashcan support is needed to avoid stack overflows during object deallocation in sage (https://trac.sagemath.org/ticket/27267)
-    ./trashcan.patch
-    # The above commit introduces custom trashcan macros, as well as
-    # compiler changes to use them in Cython-emitted code. The latter
-    # change is still useful, but the former has been upstreamed as of
-    # Python 3.8, and the patch below makes Cython use the upstream
-    # trashcan macros whenever available. This is needed for Python
-    # 3.11 support, because the API used in Cython's implementation
-    # changed: https://github.com/cython/cython/pull/4475
-    (fetchpatch {
-      name = "disable-trashcan.patch";
-      url = "https://github.com/cython/cython/commit/e337825cdcf5e94d38ba06a0cb0188e99ce0cc92.patch";
-      hash = "sha256-q0f63eetKrDpmP5Z4v8EuGxg26heSyp/62OYqhRoSso=";
-    })
-  ];
+  env.LC_ALL = "en_US.UTF-8";
 
   checkPhase = ''
     export HOME="$NIX_BUILD_TOP"
diff --git a/pkgs/development/python-modules/daqp/default.nix b/pkgs/development/python-modules/daqp/default.nix
index 2b134f9f723d..e5ae5e62be90 100644
--- a/pkgs/development/python-modules/daqp/default.nix
+++ b/pkgs/development/python-modules/daqp/default.nix
@@ -1,9 +1,8 @@
 { lib
-, stdenv
 , fetchFromGitHub
 , buildPythonPackage
 , unittestCheckHook
-, cython
+, cython_0
 , setuptools
 , wheel
 , numpy
@@ -32,7 +31,7 @@ buildPythonPackage rec {
   unittestFlagsArray = [ "-s" "test" "-p" "'*.py'" "-v" ];
 
   nativeBuildInputs = [
-    cython
+    cython_0
     setuptools
     wheel
   ];
diff --git a/pkgs/development/python-modules/dbus-fast/default.nix b/pkgs/development/python-modules/dbus-fast/default.nix
index 014e7ad01f72..d4db4490415b 100644
--- a/pkgs/development/python-modules/dbus-fast/default.nix
+++ b/pkgs/development/python-modules/dbus-fast/default.nix
@@ -1,7 +1,7 @@
 { lib
 , async-timeout
 , buildPythonPackage
-, cython_3
+, cython
 , fetchFromGitHub
 , poetry-core
 , pytest-asyncio
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   env.REQUIRE_CYTHON = 1;
 
   nativeBuildInputs = [
-    cython_3
+    cython
     poetry-core
     setuptools
     wheel
diff --git a/pkgs/development/python-modules/dtlssocket/default.nix b/pkgs/development/python-modules/dtlssocket/default.nix
index 80831ea0eb50..bad1a6c73377 100644
--- a/pkgs/development/python-modules/dtlssocket/default.nix
+++ b/pkgs/development/python-modules/dtlssocket/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchPypi
 , autoconf
-, cython
+, cython_0
 , setuptools
 }:
 
@@ -20,7 +20,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     autoconf
-    cython
+    cython_0
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/editdistance/default.nix b/pkgs/development/python-modules/editdistance/default.nix
index d7c55b265a45..b4f62dd6e823 100644
--- a/pkgs/development/python-modules/editdistance/default.nix
+++ b/pkgs/development/python-modules/editdistance/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , pytestCheckHook
-, cython_3
+, cython
 , pdm-backend
 , setuptools
 , pythonOlder
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     pdm-backend
     setuptools
   ];
diff --git a/pkgs/development/python-modules/editdistpy/default.nix b/pkgs/development/python-modules/editdistpy/default.nix
index a785e1b05b67..537f4851f6a9 100644
--- a/pkgs/development/python-modules/editdistpy/default.nix
+++ b/pkgs/development/python-modules/editdistpy/default.nix
@@ -7,7 +7,7 @@
 , pythonOlder
 
 , setuptools
-, cython_3
+, cython
 
 , symspellpy
 , numpy
@@ -30,7 +30,7 @@ buildPythonPackage rec {
 
   build-system = [
     setuptools
-    cython_3
+    cython
   ];
 
   # error: infinite recursion encountered
diff --git a/pkgs/development/python-modules/falcon/default.nix b/pkgs/development/python-modules/falcon/default.nix
index 2cb7c3cc7895..51f9bfd79a35 100644
--- a/pkgs/development/python-modules/falcon/default.nix
+++ b/pkgs/development/python-modules/falcon/default.nix
@@ -6,7 +6,7 @@
 , fetchFromGitHub
 
 # build
-, cython_3
+, cython
 , setuptools
 
 # tests
@@ -43,7 +43,7 @@ buildPythonPackage rec {
   nativeBuildInputs = [
     setuptools
   ] ++ lib.optionals (!isPyPy) [
-    cython_3
+    cython
   ];
 
   __darwinAllowLocalNetworking = true;
diff --git a/pkgs/development/python-modules/fiona/default.nix b/pkgs/development/python-modules/fiona/default.nix
index e19875296ff0..35c9b57ce555 100644
--- a/pkgs/development/python-modules/fiona/default.nix
+++ b/pkgs/development/python-modules/fiona/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , pythonOlder
 , fetchFromGitHub
-, cython_3
+, cython
 , gdal
 , oldest-supported-numpy
 , setuptools
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     gdal # for gdal-config
     oldest-supported-numpy
     setuptools
diff --git a/pkgs/development/python-modules/fpylll/default.nix b/pkgs/development/python-modules/fpylll/default.nix
index 54d3d8f34f79..7e2b0b5ed069 100644
--- a/pkgs/development/python-modules/fpylll/default.nix
+++ b/pkgs/development/python-modules/fpylll/default.nix
@@ -5,7 +5,7 @@
 
 # build-system
 , cysignals
-, cython_3
+, cython
 , pkgconfig
 , setuptools
 
@@ -39,7 +39,7 @@ buildPythonPackage rec {
   ];
 
   nativeBuildInputs = [
-    cython_3
+    cython
     cysignals
     pkgconfig
     setuptools
diff --git a/pkgs/development/python-modules/frozenlist/default.nix b/pkgs/development/python-modules/frozenlist/default.nix
index 7e2646045518..73860b6f79ff 100644
--- a/pkgs/development/python-modules/frozenlist/default.nix
+++ b/pkgs/development/python-modules/frozenlist/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython_3
+, cython
 , expandvars
 , fetchFromGitHub
 , pep517
@@ -30,7 +30,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     expandvars
-    cython_3
+    cython
     pep517
     setuptools
     wheel
diff --git a/pkgs/development/python-modules/fugashi/default.nix b/pkgs/development/python-modules/fugashi/default.nix
index 021ac6dd1d11..64f5ef9afcdb 100644
--- a/pkgs/development/python-modules/fugashi/default.nix
+++ b/pkgs/development/python-modules/fugashi/default.nix
@@ -3,7 +3,7 @@
 , pythonOlder
 , pytestCheckHook
 , buildPythonPackage
-, cython
+, cython_0
 , mecab
 , setuptools-scm
 , ipadic
@@ -24,7 +24,7 @@ buildPythonPackage rec {
     hash = "sha256-4i7Q+TtXTQNSJ1EIcS8KHrVPdCJAgZh86Y6lB8772XU=";
   };
 
-  nativeBuildInputs = [ cython mecab setuptools-scm ];
+  nativeBuildInputs = [ cython_0 mecab setuptools-scm ];
 
   nativeCheckInputs = [ ipadic pytestCheckHook ]
     ++ passthru.optional-dependencies.unidic-lite;
diff --git a/pkgs/development/python-modules/gbinder-python/default.nix b/pkgs/development/python-modules/gbinder-python/default.nix
index 6608cf305063..bb64e0c5e6a8 100644
--- a/pkgs/development/python-modules/gbinder-python/default.nix
+++ b/pkgs/development/python-modules/gbinder-python/default.nix
@@ -1,7 +1,7 @@
 { lib
 , fetchFromGitHub
 , buildPythonPackage
-, cython
+, cython_0
 , pkg-config
 , libgbinder
 }:
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   ];
 
   nativeBuildInputs = [
-    cython
+    cython_0
     pkg-config
   ];
 
diff --git a/pkgs/development/python-modules/gevent/default.nix b/pkgs/development/python-modules/gevent/default.nix
index d6264794a505..ca3a7c1ff9a5 100644
--- a/pkgs/development/python-modules/gevent/default.nix
+++ b/pkgs/development/python-modules/gevent/default.nix
@@ -5,7 +5,7 @@
 , python
 , libev
 , cffi
-, cython_3
+, cython
 , greenlet
 , importlib-metadata
 , setuptools
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
     wheel
   ] ++ lib.optionals (!isPyPy) [
diff --git a/pkgs/development/python-modules/h5py/default.nix b/pkgs/development/python-modules/h5py/default.nix
index a11578f832ba..4afd562e033d 100644
--- a/pkgs/development/python-modules/h5py/default.nix
+++ b/pkgs/development/python-modules/h5py/default.nix
@@ -7,7 +7,7 @@
 , wheel
 , numpy
 , hdf5
-, cython
+, cython_0
 , pkgconfig
 , mpi4py ? null
 , openssh
@@ -50,7 +50,7 @@ in buildPythonPackage rec {
   preBuild = lib.optionalString mpiSupport "export CC=${lib.getDev mpi}/bin/mpicc";
 
   nativeBuildInputs = [
-    cython
+    cython_0
     oldest-supported-numpy
     pkgconfig
     setuptools
diff --git a/pkgs/development/python-modules/hidapi/default.nix b/pkgs/development/python-modules/hidapi/default.nix
index 9b4e76186f26..84f62c239c8b 100644
--- a/pkgs/development/python-modules/hidapi/default.nix
+++ b/pkgs/development/python-modules/hidapi/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , fetchPypi
 , xcbuild
-, cython
+, cython_0
 , libusb1
 , udev
 , darwin
@@ -21,7 +21,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = lib.optionals stdenv.isDarwin [ xcbuild ];
 
-  propagatedBuildInputs = [ cython ]
+  propagatedBuildInputs = [ cython_0 ]
     ++ lib.optionals stdenv.isLinux [ libusb1 udev ]
     ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [ AppKit CoreFoundation IOKit ]);
 
diff --git a/pkgs/development/python-modules/in-n-out/default.nix b/pkgs/development/python-modules/in-n-out/default.nix
index 39c7a3f7de88..ffd68b29b90d 100644
--- a/pkgs/development/python-modules/in-n-out/default.nix
+++ b/pkgs/development/python-modules/in-n-out/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython_3
+, cython
 , fetchPypi
 , future
 , pytestCheckHook
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     hatchling
     hatch-vcs
   ];
diff --git a/pkgs/development/python-modules/kivy/default.nix b/pkgs/development/python-modules/kivy/default.nix
index d9b8e23fe416..63c918f8b9fd 100644
--- a/pkgs/development/python-modules/kivy/default.nix
+++ b/pkgs/development/python-modules/kivy/default.nix
@@ -1,6 +1,6 @@
 { lib, stdenv
 , buildPythonPackage, fetchFromGitHub, fetchpatch
-, pkg-config, cython, docutils
+, pkg-config, cython_0, docutils
 , kivy-garden
 , mesa, mtdev, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer
 , Accelerate, ApplicationServices, AVFoundation, libcxx
@@ -31,7 +31,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     pkg-config
-    cython
+    cython_0
     docutils
   ];
 
diff --git a/pkgs/development/python-modules/levenshtein/default.nix b/pkgs/development/python-modules/levenshtein/default.nix
index 9b4d9caaf699..453ec1be9052 100644
--- a/pkgs/development/python-modules/levenshtein/default.nix
+++ b/pkgs/development/python-modules/levenshtein/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , buildPythonPackage
 , cmake
-, cython_3
+, cython
 , fetchFromGitHub
 , pytestCheckHook
 , pythonOlder
@@ -28,7 +28,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     cmake
-    cython_3
+    cython
     scikit-build
   ];
 
diff --git a/pkgs/development/python-modules/libgpuarray/default.nix b/pkgs/development/python-modules/libgpuarray/default.nix
index 710ef3dd1398..d186233ccdc4 100644
--- a/pkgs/development/python-modules/libgpuarray/default.nix
+++ b/pkgs/development/python-modules/libgpuarray/default.nix
@@ -4,7 +4,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , cmake
-, cython
+, cython_0
 , numpy
 , six
 , nose
@@ -67,13 +67,13 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     cmake
+    cython_0
   ] ++ lib.optionals cudaSupport [
     addOpenGLRunpath
   ];
 
 
   buildInputs = [
-    cython
     nose
   ];
 
diff --git a/pkgs/development/python-modules/line-profiler/default.nix b/pkgs/development/python-modules/line-profiler/default.nix
index d50b3fa36f49..f8a3c5378bb0 100644
--- a/pkgs/development/python-modules/line-profiler/default.nix
+++ b/pkgs/development/python-modules/line-profiler/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, cython_3
+, cython
 , isPyPy
 , ipython
 , scikit-build
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     cmake
     scikit-build
   ];
diff --git a/pkgs/development/python-modules/llfuse/default.nix b/pkgs/development/python-modules/llfuse/default.nix
index 85c6d0fb50fd..5e1ce47bdc67 100644
--- a/pkgs/development/python-modules/llfuse/default.nix
+++ b/pkgs/development/python-modules/llfuse/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , pythonOlder
 , fetchFromGitHub
-, cython_3
+, cython
 , fuse
 , pkg-config
 , pytestCheckHook
@@ -27,7 +27,7 @@ buildPythonPackage rec {
     hash = "sha256-6/iW5eHmX6ODVPLFkOo3bN9yW8ixqy2MHwQ2r9FA0iI=";
   };
 
-  nativeBuildInputs = [ cython_3 pkg-config setuptools ];
+  nativeBuildInputs = [ cython pkg-config setuptools ];
 
   buildInputs = [ fuse ];
 
diff --git a/pkgs/development/python-modules/lupa/default.nix b/pkgs/development/python-modules/lupa/default.nix
index c79f0de9dd89..4b879a90966f 100644
--- a/pkgs/development/python-modules/lupa/default.nix
+++ b/pkgs/development/python-modules/lupa/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython_3
+, cython
 , fetchPypi
 , pythonOlder
 , setuptools
@@ -19,7 +19,7 @@ buildPythonPackage rec {
   };
 
   build-system = [
-    cython_3
+    cython
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/lxml/default.nix b/pkgs/development/python-modules/lxml/default.nix
index e6d7234a59ce..d1d7036eda2e 100644
--- a/pkgs/development/python-modules/lxml/default.nix
+++ b/pkgs/development/python-modules/lxml/default.nix
@@ -4,7 +4,7 @@
 , fetchFromGitHub
 
 # build-system
-, cython_3
+, cython
 , setuptools
 
 # native dependencies
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   nativeBuildInputs = [
     libxml2.dev
     libxslt.dev
-    cython_3
+    cython
     setuptools
    ] ++ lib.optionals stdenv.isDarwin [
     xcodebuild
diff --git a/pkgs/development/python-modules/mdtraj/default.nix b/pkgs/development/python-modules/mdtraj/default.nix
index ad20cdbf0671..971688348a1d 100644
--- a/pkgs/development/python-modules/mdtraj/default.nix
+++ b/pkgs/development/python-modules/mdtraj/default.nix
@@ -5,7 +5,7 @@
 , fetchpatch
 , llvmPackages
 , zlib
-, cython
+, cython_0
 , oldest-supported-numpy
 , setuptools
 , wheel
@@ -42,7 +42,7 @@ buildPythonPackage rec {
   ];
 
   nativeBuildInputs = [
-    cython
+    cython_0
     oldest-supported-numpy
     setuptools
     wheel
diff --git a/pkgs/development/python-modules/memory-allocator/default.nix b/pkgs/development/python-modules/memory-allocator/default.nix
index 90c75d0bb7fe..bb9b7dd47509 100644
--- a/pkgs/development/python-modules/memory-allocator/default.nix
+++ b/pkgs/development/python-modules/memory-allocator/default.nix
@@ -1,7 +1,7 @@
 { lib
 , fetchPypi
 , buildPythonPackage
-, cython_3
+, cython
 }:
 
 buildPythonPackage rec {
@@ -15,7 +15,7 @@ buildPythonPackage rec {
     hash = "sha256-E4BcKuHAG3SJ+rXo6sk2FmK08sAkEuNlLuzkj/aVMWI=";
   };
 
-  propagatedBuildInputs = [ cython_3 ];
+  propagatedBuildInputs = [ cython ];
 
   pythonImportsCheck = [ "memory_allocator" ];
 
diff --git a/pkgs/development/python-modules/ndindex/default.nix b/pkgs/development/python-modules/ndindex/default.nix
index 5e98ea185700..5ee682994575 100644
--- a/pkgs/development/python-modules/ndindex/default.nix
+++ b/pkgs/development/python-modules/ndindex/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 
 # build-system
-, cython_3
+, cython
 
 # optional
 , numpy
@@ -27,7 +27,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
   ];
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/nipy/default.nix b/pkgs/development/python-modules/nipy/default.nix
index 1a1813ebb8af..a5807ae224d5 100644
--- a/pkgs/development/python-modules/nipy/default.nix
+++ b/pkgs/development/python-modules/nipy/default.nix
@@ -3,7 +3,7 @@
 , fetchPypi
 
 # build-system
-, cython_3
+, cython
 , meson-python
 , ninja
 , setuptools
@@ -37,7 +37,7 @@ buildPythonPackage rec {
   '';
 
   build-system = [
-    cython_3
+    cython
     meson-python
     setuptools
     ninja
diff --git a/pkgs/development/python-modules/numpy/default.nix b/pkgs/development/python-modules/numpy/default.nix
index b3c80a49798c..7aee840ab9d3 100644
--- a/pkgs/development/python-modules/numpy/default.nix
+++ b/pkgs/development/python-modules/numpy/default.nix
@@ -8,7 +8,7 @@
 , writeTextFile
 
 # build-system
-, cython_3
+, cython
 , gfortran
 , meson-python
 , mesonEmulatorHook
@@ -91,7 +91,7 @@ in buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     gfortran
     meson-python
     pkg-config
diff --git a/pkgs/development/python-modules/openstep-plist/default.nix b/pkgs/development/python-modules/openstep-plist/default.nix
index 2aa81629c623..fc37d86016f6 100644
--- a/pkgs/development/python-modules/openstep-plist/default.nix
+++ b/pkgs/development/python-modules/openstep-plist/default.nix
@@ -3,8 +3,7 @@
 , fetchPypi
 , setuptools-scm
 , pytestCheckHook
-, cython
-, pythonImportsCheckHook
+, cython_0
 }:
 
 buildPythonPackage rec {
@@ -19,7 +18,7 @@ buildPythonPackage rec {
     extension = "zip";
   };
 
-  nativeBuildInputs = [ setuptools-scm cython ];
+  nativeBuildInputs = [ setuptools-scm cython_0 ];
   nativeCheckInputs = [ pytestCheckHook ];
   pythonImportsCheck = [ "openstep_plist" ];
 
diff --git a/pkgs/development/python-modules/oracledb/default.nix b/pkgs/development/python-modules/oracledb/default.nix
index da45e616b42c..60055f7e6182 100644
--- a/pkgs/development/python-modules/oracledb/default.nix
+++ b/pkgs/development/python-modules/oracledb/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , cryptography
-, cython_3
+, cython
 , fetchPypi
 , pythonOlder
 , setuptools
@@ -21,7 +21,7 @@ buildPythonPackage rec {
   };
 
   build-system = [
-    cython_3
+    cython
     setuptools
     wheel
   ];
diff --git a/pkgs/development/python-modules/pandas/default.nix b/pkgs/development/python-modules/pandas/default.nix
index 6cb46d6777c9..c42472682a7e 100644
--- a/pkgs/development/python-modules/pandas/default.nix
+++ b/pkgs/development/python-modules/pandas/default.nix
@@ -6,7 +6,7 @@
 , pythonOlder
 
 # build-system
-, cython_3
+, cython
 , meson-python
 , meson
 , oldest-supported-numpy
@@ -84,7 +84,7 @@ let pandas = buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     meson-python
     meson
     numpy
diff --git a/pkgs/development/python-modules/pplpy/default.nix b/pkgs/development/python-modules/pplpy/default.nix
index c3a1f8192acf..ec9bddb5ec99 100644
--- a/pkgs/development/python-modules/pplpy/default.nix
+++ b/pkgs/development/python-modules/pplpy/default.nix
@@ -5,7 +5,7 @@
 , mpfr
 , libmpc
 , ppl
-, cython_3
+, cython
 , cysignals
 , gmpy2
 , sphinx
@@ -33,7 +33,7 @@ buildPythonPackage rec {
   ];
 
   propagatedBuildInputs = [
-    cython_3
+    cython
     cysignals
     gmpy2
   ];
diff --git a/pkgs/development/python-modules/primecountpy/default.nix b/pkgs/development/python-modules/primecountpy/default.nix
index 6653a65671b3..463a0cf50be6 100644
--- a/pkgs/development/python-modules/primecountpy/default.nix
+++ b/pkgs/development/python-modules/primecountpy/default.nix
@@ -2,7 +2,7 @@
 , fetchPypi
 , buildPythonPackage
 , primecount
-, cython_3
+, cython
 , cysignals
 }:
 
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   buildInputs = [ primecount ];
 
-  propagatedBuildInputs = [ cython_3 cysignals ];
+  propagatedBuildInputs = [ cython cysignals ];
 
   # depends on pytest-cython for "pytest --doctest-cython"
   doCheck = false;
diff --git a/pkgs/development/python-modules/psycopg/default.nix b/pkgs/development/python-modules/psycopg/default.nix
index 84161d1a8781..65d9e3523620 100644
--- a/pkgs/development/python-modules/psycopg/default.nix
+++ b/pkgs/development/python-modules/psycopg/default.nix
@@ -15,7 +15,7 @@
 , typing-extensions
 
 # psycopg-c
-, cython_3
+, cython
 , tomli
 
 # docs
@@ -72,7 +72,7 @@ let
     '';
 
     nativeBuildInputs = [
-      cython_3
+      cython
       postgresql
       setuptools
       tomli
diff --git a/pkgs/development/python-modules/py-libzfs/default.nix b/pkgs/development/python-modules/py-libzfs/default.nix
index d22e931cd937..661a79dd6485 100644
--- a/pkgs/development/python-modules/py-libzfs/default.nix
+++ b/pkgs/development/python-modules/py-libzfs/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , buildPythonPackage
 , fetchFromGitHub
-, cython
+, cython_0
 , zfs
 }:
 
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     hash = "sha256-vBLbjP1gQEQNsTLc2W6uRzCFHQXZp+jGiwE0Pe8VTuw=";
   };
 
-  nativeBuildInputs = [ cython ];
+  nativeBuildInputs = [ cython_0 ];
   buildInputs = [ zfs ];
 
   # Passing CFLAGS in configureFlags does not work, see https://github.com/truenas/py-libzfs/issues/107
diff --git a/pkgs/development/python-modules/pyarrow/default.nix b/pkgs/development/python-modules/pyarrow/default.nix
index 7c19bdefd4f6..da50d8f45735 100644
--- a/pkgs/development/python-modules/pyarrow/default.nix
+++ b/pkgs/development/python-modules/pyarrow/default.nix
@@ -8,7 +8,7 @@
 , cffi
 , cloudpickle
 , cmake
-, cython
+, cython_0
 , fsspec
 , hypothesis
 , numpy
@@ -45,7 +45,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     cmake
-    cython
+    cython_0
     pkg-config
     setuptools
     setuptools-scm
diff --git a/pkgs/development/python-modules/pydantic/1.nix b/pkgs/development/python-modules/pydantic/1.nix
index ffe38546148e..6078acc356ce 100644
--- a/pkgs/development/python-modules/pydantic/1.nix
+++ b/pkgs/development/python-modules/pydantic/1.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython
+, cython_0
 , email-validator
 , fetchFromGitHub
 , pytest-mock
@@ -29,7 +29,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     setuptools
-    cython
+    cython_0
   ];
 
   buildInputs = lib.optionals (pythonOlder "3.9") [
diff --git a/pkgs/development/python-modules/pyfftw/default.nix b/pkgs/development/python-modules/pyfftw/default.nix
index e47184f9b15c..746377c3c131 100644
--- a/pkgs/development/python-modules/pyfftw/default.nix
+++ b/pkgs/development/python-modules/pyfftw/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchPypi
-, fftw, fftwFloat, fftwLongDouble, numpy, scipy, cython, dask }:
+, fftw, fftwFloat, fftwLongDouble, numpy, scipy, cython_0, dask }:
 
 buildPythonPackage rec {
   version = "0.13.1";
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   buildInputs = [ fftw fftwFloat fftwLongDouble];
 
-  propagatedBuildInputs = [ numpy scipy cython dask ];
+  propagatedBuildInputs = [ numpy scipy cython_0 dask ];
 
   # Tests cannot import pyfftw. pyfftw works fine though.
   doCheck = false;
diff --git a/pkgs/development/python-modules/pyfuse3/default.nix b/pkgs/development/python-modules/pyfuse3/default.nix
index d33938905753..851b37bbfb9c 100644
--- a/pkgs/development/python-modules/pyfuse3/default.nix
+++ b/pkgs/development/python-modules/pyfuse3/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , pythonOlder
 , fetchFromGitHub
-, cython_3
+, cython
 , pkg-config
 , setuptools
 , fuse3
@@ -34,7 +34,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     pkg-config
     setuptools
   ];
diff --git a/pkgs/development/python-modules/pygame-sdl2/default.nix b/pkgs/development/python-modules/pygame-sdl2/default.nix
index 93eea02a9041..0201c9cb4a8a 100644
--- a/pkgs/development/python-modules/pygame-sdl2/default.nix
+++ b/pkgs/development/python-modules/pygame-sdl2/default.nix
@@ -1,5 +1,5 @@
 { lib, buildPythonPackage, fetchurl, isPy27, renpy
-, cython, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
+, cython_0, SDL2, SDL2_image, SDL2_ttf, SDL2_mixer, libjpeg, libpng }:
 
 buildPythonPackage rec {
   pname = "pygame-sdl2";
@@ -24,7 +24,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    SDL2.dev cython
+    SDL2.dev cython_0
   ];
 
   buildInputs = [
diff --git a/pkgs/development/python-modules/pygame/default.nix b/pkgs/development/python-modules/pygame/default.nix
index 6bc41339d927..a219804f34b8 100644
--- a/pkgs/development/python-modules/pygame/default.nix
+++ b/pkgs/development/python-modules/pygame/default.nix
@@ -6,7 +6,7 @@
 , pythonOlder
 
 # build-system
-, cython_3
+, cython
 , setuptools
 , pkg-config
 
@@ -70,7 +70,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     pkg-config
     SDL2
     setuptools
diff --git a/pkgs/development/python-modules/pygeos/default.nix b/pkgs/development/python-modules/pygeos/default.nix
index 657da35b4ad3..298d4bdff7fe 100644
--- a/pkgs/development/python-modules/pygeos/default.nix
+++ b/pkgs/development/python-modules/pygeos/default.nix
@@ -4,7 +4,7 @@
 , python
 , geos_3_11
 , pytestCheckHook
-, cython
+, cython_0
 , numpy
 }:
 
@@ -20,7 +20,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     geos_3_11 # for geos-config
-    cython
+    cython_0
   ];
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pykdtree/default.nix b/pkgs/development/python-modules/pykdtree/default.nix
index b81bba27f1a4..b720f5b838b3 100644
--- a/pkgs/development/python-modules/pykdtree/default.nix
+++ b/pkgs/development/python-modules/pykdtree/default.nix
@@ -3,7 +3,7 @@
 , fetchPypi
 
 # build-system
-, cython_3
+, cython
 , numpy
 , setuptools
 
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     numpy
     setuptools
   ];
diff --git a/pkgs/development/python-modules/pylibjpeg-libjpeg/default.nix b/pkgs/development/python-modules/pylibjpeg-libjpeg/default.nix
index 3872fa6b2417..9040f955efb4 100644
--- a/pkgs/development/python-modules/pylibjpeg-libjpeg/default.nix
+++ b/pkgs/development/python-modules/pylibjpeg-libjpeg/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 , pythonOlder
 , pytestCheckHook
-, cython_3
+, cython
 , poetry-core
 , setuptools
 , numpy
@@ -25,7 +25,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     poetry-core
     setuptools
   ];
diff --git a/pkgs/development/python-modules/pyliblo/default.nix b/pkgs/development/python-modules/pyliblo/default.nix
index db962d165f8b..0735fdcb7216 100644
--- a/pkgs/development/python-modules/pyliblo/default.nix
+++ b/pkgs/development/python-modules/pyliblo/default.nix
@@ -4,7 +4,7 @@
 , isPyPy
 , pythonAtLeast
 , liblo
-, cython
+, cython_0
 }:
 
 buildPythonPackage rec {
@@ -25,7 +25,9 @@ buildPythonPackage rec {
     })
   ];
 
-  buildInputs = [ liblo cython ];
+  build-system = [ cython_0 ];
+
+  buildInputs = [ liblo ];
 
   meta = with lib; {
     homepage = "https://das.nasophon.de/pyliblo/";
diff --git a/pkgs/development/python-modules/pyopengl-accelerate/default.nix b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
index f85e825f2645..4dc8803fa037 100644
--- a/pkgs/development/python-modules/pyopengl-accelerate/default.nix
+++ b/pkgs/development/python-modules/pyopengl-accelerate/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , pythonAtLeast
 , fetchPypi
-, cython_3
+, cython
 , numpy
 , setuptools
 , wheel
@@ -20,7 +20,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     numpy
     setuptools
     wheel
diff --git a/pkgs/development/python-modules/pyreadstat/default.nix b/pkgs/development/python-modules/pyreadstat/default.nix
index 1a575db7c2e2..b8eaa04b1a93 100644
--- a/pkgs/development/python-modules/pyreadstat/default.nix
+++ b/pkgs/development/python-modules/pyreadstat/default.nix
@@ -1,7 +1,7 @@
 { lib
 , stdenv
 , buildPythonPackage
-, cython_3
+, cython
 , fetchFromGitHub
 , libiconv
 , pandas
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
   ];
 
   buildInputs = [
diff --git a/pkgs/development/python-modules/pyrevolve/default.nix b/pkgs/development/python-modules/pyrevolve/default.nix
index d60b2164051c..48eed5323214 100644
--- a/pkgs/development/python-modules/pyrevolve/default.nix
+++ b/pkgs/development/python-modules/pyrevolve/default.nix
@@ -4,7 +4,7 @@
 , contexttimer
 , setuptools
 , versioneer
-, cython
+, cython_0
 , numpy
 , pytestCheckHook
 , pythonOlder
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython
+    cython_0
     setuptools
     versioneer
   ];
diff --git a/pkgs/development/python-modules/pysam/default.nix b/pkgs/development/python-modules/pysam/default.nix
index d2887eda5847..269b2249887a 100644
--- a/pkgs/development/python-modules/pysam/default.nix
+++ b/pkgs/development/python-modules/pysam/default.nix
@@ -4,7 +4,7 @@
 , bzip2
 , bcftools
 , curl
-, cython_3
+, cython
 , htslib
 , libdeflate
 , xz
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     samtools
     setuptools
   ];
diff --git a/pkgs/development/python-modules/python-box/default.nix b/pkgs/development/python-modules/python-box/default.nix
index 3145debc745c..9a7350c34eb8 100644
--- a/pkgs/development/python-modules/python-box/default.nix
+++ b/pkgs/development/python-modules/python-box/default.nix
@@ -1,6 +1,6 @@
 { lib
 , buildPythonPackage
-, cython_3
+, cython
 , fetchFromGitHub
 , msgpack
 , poetry-core
@@ -29,7 +29,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/python-openems/default.nix b/pkgs/development/python-modules/python-openems/default.nix
index 8da6b87f8ba5..c4b07b18cafa 100644
--- a/pkgs/development/python-modules/python-openems/default.nix
+++ b/pkgs/development/python-modules/python-openems/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildPythonPackage
-, fetchFromGitHub
-, cython
+, cython_0
 , openems
 , csxcad
 , boost
@@ -20,7 +19,7 @@ buildPythonPackage rec {
   sourceRoot = "${src.name}/python";
 
   nativeBuildInputs = [
-    cython
+    cython_0
     boost
   ];
 
diff --git a/pkgs/development/python-modules/python-rtmidi/default.nix b/pkgs/development/python-modules/python-rtmidi/default.nix
index 6265d9500810..9f073fd0a6ae 100644
--- a/pkgs/development/python-modules/python-rtmidi/default.nix
+++ b/pkgs/development/python-modules/python-rtmidi/default.nix
@@ -7,7 +7,7 @@
 , CoreMIDI
 , CoreServices
 , Foundation
-, cython_3
+, cython
 , fetchPypi
 , flake8
 , libjack2
@@ -33,7 +33,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     meson-python
     ninja
     pkg-config
diff --git a/pkgs/development/python-modules/pyyaml/default.nix b/pkgs/development/python-modules/pyyaml/default.nix
index a7270958387d..ce562e48ce54 100644
--- a/pkgs/development/python-modules/pyyaml/default.nix
+++ b/pkgs/development/python-modules/pyyaml/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , pythonOlder
 , fetchFromGitHub
-, cython
+, cython_0
 , setuptools
 , libyaml
 , python
@@ -24,7 +24,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython
+    cython_0
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/pyzmq/default.nix b/pkgs/development/python-modules/pyzmq/default.nix
index 0493381718c1..51429d535df4 100644
--- a/pkgs/development/python-modules/pyzmq/default.nix
+++ b/pkgs/development/python-modules/pyzmq/default.nix
@@ -4,7 +4,7 @@
 , isPyPy
 
 # build-system
-, cython_3
+, cython
 , setuptools
 , setuptools-scm
 , packaging
@@ -40,7 +40,7 @@ buildPythonPackage rec {
   ] ++ (if isPyPy then [
     cffi
   ] else [
-    cython_3
+    cython
   ]);
 
   buildInputs = [
diff --git a/pkgs/development/python-modules/qutip/default.nix b/pkgs/development/python-modules/qutip/default.nix
index 6c57c8f3c076..d30759869cc8 100644
--- a/pkgs/development/python-modules/qutip/default.nix
+++ b/pkgs/development/python-modules/qutip/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , cvxopt
 , cvxpy
-, cython
+, cython_0
 , fetchFromGitHub
 , ipython
 , matplotlib
@@ -31,7 +31,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython
+    cython_0
   ];
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/rapidfuzz/default.nix b/pkgs/development/python-modules/rapidfuzz/default.nix
index 5a1a6296b48d..13c04b2f1dc0 100644
--- a/pkgs/development/python-modules/rapidfuzz/default.nix
+++ b/pkgs/development/python-modules/rapidfuzz/default.nix
@@ -4,7 +4,7 @@
 , pythonOlder
 , fetchFromGitHub
 , cmake
-, cython_3
+, cython
 , ninja
 , scikit-build
 , setuptools
@@ -37,7 +37,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     cmake
-    cython_3
+    cython
     ninja
     scikit-build
     setuptools
diff --git a/pkgs/development/python-modules/rasterio/default.nix b/pkgs/development/python-modules/rasterio/default.nix
index eef18524c217..b919a3afe062 100644
--- a/pkgs/development/python-modules/rasterio/default.nix
+++ b/pkgs/development/python-modules/rasterio/default.nix
@@ -13,7 +13,7 @@
 , click
 , click-plugins
 , cligj
-, cython_3
+, cython
 , gdal
 , hypothesis
 , ipython
@@ -55,7 +55,7 @@ buildPythonPackage rec {
   ];
 
   nativeBuildInputs = [
-    cython_3
+    cython
     gdal
     numpy
     oldest-supported-numpy
diff --git a/pkgs/development/python-modules/reproject/default.nix b/pkgs/development/python-modules/reproject/default.nix
index bbab3a462dbb..ff6e3070cf7e 100644
--- a/pkgs/development/python-modules/reproject/default.nix
+++ b/pkgs/development/python-modules/reproject/default.nix
@@ -4,7 +4,7 @@
 , astropy-healpix
 , buildPythonPackage
 , cloudpickle
-, cython_3
+, cython
 , dask
 , fetchPypi
 , fsspec
@@ -37,7 +37,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     astropy-extension-helpers
-    cython_3
+    cython
     numpy
     oldest-supported-numpy
     setuptools-scm
diff --git a/pkgs/development/python-modules/rtmidi-python/default.nix b/pkgs/development/python-modules/rtmidi-python/default.nix
index 33f6ba217882..462207a2fea4 100644
--- a/pkgs/development/python-modules/rtmidi-python/default.nix
+++ b/pkgs/development/python-modules/rtmidi-python/default.nix
@@ -2,7 +2,7 @@
 , stdenv
 , buildPythonPackage
 , fetchPypi
-, cython
+, cython_0
 , alsa-lib
 , CoreAudio
 , CoreMIDI
@@ -23,7 +23,7 @@ buildPythonPackage rec {
     rm rtmidi_python.cpp
   '';
 
-  nativeBuildInputs = [ cython ];
+  nativeBuildInputs = [ cython_0 ];
   buildInputs = lib.optionals stdenv.isLinux [
     alsa-lib
   ] ++ lib.optionals stdenv.isDarwin [
diff --git a/pkgs/development/python-modules/scikit-learn/default.nix b/pkgs/development/python-modules/scikit-learn/default.nix
index b6c703d7870d..7ffe72261f44 100644
--- a/pkgs/development/python-modules/scikit-learn/default.nix
+++ b/pkgs/development/python-modules/scikit-learn/default.nix
@@ -4,7 +4,7 @@
 , fetchPypi
 
 # build-system
-, cython_3
+, cython
 , gfortran
 , numpy
 , scipy
@@ -46,7 +46,7 @@ buildPythonPackage rec {
   ];
 
   build-system = [
-    cython_3
+    cython
     numpy
     scipy
     setuptools
diff --git a/pkgs/development/python-modules/seabreeze/default.nix b/pkgs/development/python-modules/seabreeze/default.nix
index 24aa665bccfc..119e36d663ef 100644
--- a/pkgs/development/python-modules/seabreeze/default.nix
+++ b/pkgs/development/python-modules/seabreeze/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 
 # build-system
-, cython_3
+, cython
 , git
 , pkgconfig
 , setuptools
@@ -40,7 +40,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     git
     pkgconfig
     setuptools
diff --git a/pkgs/development/python-modules/sfepy/default.nix b/pkgs/development/python-modules/sfepy/default.nix
index 676c2510f6b9..8e2c18fb1e62 100644
--- a/pkgs/development/python-modules/sfepy/default.nix
+++ b/pkgs/development/python-modules/sfepy/default.nix
@@ -1,5 +1,4 @@
-{ stdenv
-, lib
+{ lib
 , buildPythonPackage
 , fetchFromGitHub
 , numpy
@@ -7,7 +6,7 @@
 , matplotlib
 , pyparsing
 , tables
-, cython
+, cython_0
 , python
 , sympy
 , meshio
@@ -34,7 +33,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [
     numpy
-    cython
+    cython_0
     scipy
     matplotlib
     pyparsing
diff --git a/pkgs/development/python-modules/shapely/1.8.nix b/pkgs/development/python-modules/shapely/1.8.nix
index 0e1c3135ab99..4382ba93ec5e 100644
--- a/pkgs/development/python-modules/shapely/1.8.nix
+++ b/pkgs/development/python-modules/shapely/1.8.nix
@@ -6,7 +6,7 @@
 , pythonOlder
 , substituteAll
 
-, cython
+, cython_0
 , geos_3_11
 , numpy
 , oldest-supported-numpy
@@ -44,7 +44,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython
+    cython_0
     geos_3_11 # for geos-config
     oldest-supported-numpy
     setuptools
diff --git a/pkgs/development/python-modules/shapely/default.nix b/pkgs/development/python-modules/shapely/default.nix
index 3db9ce9e2af6..07bdd27ac020 100644
--- a/pkgs/development/python-modules/shapely/default.nix
+++ b/pkgs/development/python-modules/shapely/default.nix
@@ -5,7 +5,7 @@
 , pytestCheckHook
 , pythonOlder
 
-, cython
+, cython_0
 , geos
 , numpy
 , oldest-supported-numpy
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython
+    cython_0
     geos # for geos-config
     oldest-supported-numpy
     setuptools
diff --git a/pkgs/development/python-modules/soxr/default.nix b/pkgs/development/python-modules/soxr/default.nix
index b000900d3a7b..7cd1cc0af6bc 100644
--- a/pkgs/development/python-modules/soxr/default.nix
+++ b/pkgs/development/python-modules/soxr/default.nix
@@ -3,7 +3,7 @@
 , fetchFromGitHub
 
 # build-system
-, cython_3
+, cython
 , numpy
 , oldest-supported-numpy
 , setuptools
@@ -36,7 +36,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     gnutar
     numpy
     oldest-supported-numpy
diff --git a/pkgs/development/python-modules/sphinx/default.nix b/pkgs/development/python-modules/sphinx/default.nix
index 56c626d4591d..ace17d1fc667 100644
--- a/pkgs/development/python-modules/sphinx/default.nix
+++ b/pkgs/development/python-modules/sphinx/default.nix
@@ -27,7 +27,6 @@
 , sphinxcontrib-websupport
 
 # check phase
-, cython
 , filelock
 , html5lib
 , pytestCheckHook
@@ -83,7 +82,6 @@ buildPythonPackage rec {
   __darwinAllowLocalNetworking = true;
 
   nativeCheckInputs = [
-    cython
     filelock
     html5lib
     pytestCheckHook
@@ -108,6 +106,8 @@ buildPythonPackage rec {
     "test_class_alias_having_doccomment"
     "test_class_alias_for_imported_object_having_doccomment"
     "test_decorators"
+    # requires cython_0, but fails miserably on 3.11
+    "test_cython"
   ] ++ lib.optionals isPyPy [
     # PyPy has not __builtins__ which get asserted
     # https://doc.pypy.org/en/latest/cpython_differences.html#miscellaneous
@@ -117,7 +117,6 @@ buildPythonPackage rec {
     "test_autodoc_inherited_members_None"
     "test_automethod_for_builtin"
     "test_builtin_function"
-    "test_cython"
     "test_isattributedescriptor"
     "test_methoddescriptor"
     "test_partialfunction"
diff --git a/pkgs/development/python-modules/srsly/default.nix b/pkgs/development/python-modules/srsly/default.nix
index c3549ca3df02..be1871c0dd14 100644
--- a/pkgs/development/python-modules/srsly/default.nix
+++ b/pkgs/development/python-modules/srsly/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
-, cython
+, cython_0
 , catalogue
 , mock
 , numpy
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython
+    cython_0
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/textnets/default.nix b/pkgs/development/python-modules/textnets/default.nix
index 2ba5ff701919..399bc5288022 100644
--- a/pkgs/development/python-modules/textnets/default.nix
+++ b/pkgs/development/python-modules/textnets/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , cairocffi
-, cython_3
+, cython
 , fetchPypi
 , igraph
 , leidenalg
@@ -34,7 +34,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     pythonRelaxDepsHook
-    cython_3
+    cython
     poetry-core
     setuptools
   ];
diff --git a/pkgs/development/python-modules/thinc/default.nix b/pkgs/development/python-modules/thinc/default.nix
index db5398550689..b62c408a77fb 100644
--- a/pkgs/development/python-modules/thinc/default.nix
+++ b/pkgs/development/python-modules/thinc/default.nix
@@ -9,7 +9,7 @@
 , CoreGraphics
 , CoreVideo
 , cymem
-, cython
+, cython_0
 , fetchPypi
 , hypothesis
 , mock
@@ -50,7 +50,7 @@ buildPythonPackage rec {
   ];
 
   buildInputs = [
-    cython
+    cython_0
   ] ++ lib.optionals stdenv.isDarwin [
     Accelerate
     CoreFoundation
diff --git a/pkgs/development/python-modules/uamqp/default.nix b/pkgs/development/python-modules/uamqp/default.nix
index 334a4ce20e4b..2881c8ef0d6b 100644
--- a/pkgs/development/python-modules/uamqp/default.nix
+++ b/pkgs/development/python-modules/uamqp/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , fetchpatch
-, cython
+, cython_0
 , certifi
 , CFNetwork
 , cmake
@@ -68,7 +68,7 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [
     cmake
-    cython
+    cython_0
   ];
 
   buildInputs = [
diff --git a/pkgs/development/python-modules/uharfbuzz/default.nix b/pkgs/development/python-modules/uharfbuzz/default.nix
index 15c0d79984b2..b4ea16f1abd5 100644
--- a/pkgs/development/python-modules/uharfbuzz/default.nix
+++ b/pkgs/development/python-modules/uharfbuzz/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , pythonOlder
-, cython_3
+, cython
 , setuptools
 , setuptools-scm
 , pytestCheckHook
@@ -26,7 +26,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
     setuptools-scm
   ];
diff --git a/pkgs/development/python-modules/uvloop/default.nix b/pkgs/development/python-modules/uvloop/default.nix
index 9ee7fec91944..7aa551086869 100644
--- a/pkgs/development/python-modules/uvloop/default.nix
+++ b/pkgs/development/python-modules/uvloop/default.nix
@@ -5,7 +5,7 @@
 , fetchPypi
 
 # build-system
-, cython
+, cython_0
 , setuptools
 
 # native dependencies
@@ -33,7 +33,7 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython
+    cython_0
     setuptools
   ];
 
diff --git a/pkgs/development/python-modules/vispy/default.nix b/pkgs/development/python-modules/vispy/default.nix
index 21d8c68e7438..e25133dfda5b 100644
--- a/pkgs/development/python-modules/vispy/default.nix
+++ b/pkgs/development/python-modules/vispy/default.nix
@@ -3,7 +3,7 @@
 , buildPythonPackage
 , substituteAll
 , fetchPypi
-, cython_3
+, cython
 , fontconfig
 , freetype-py
 , hsluv
@@ -39,7 +39,7 @@ buildPythonPackage rec {
   ];
 
   nativeBuildInputs = [
-    cython_3
+    cython
     oldest-supported-numpy
     setuptools
     setuptools-scm
diff --git a/pkgs/development/python-modules/wikipedia2vec/default.nix b/pkgs/development/python-modules/wikipedia2vec/default.nix
index 12f7ef753a59..2e379b9ccb1e 100644
--- a/pkgs/development/python-modules/wikipedia2vec/default.nix
+++ b/pkgs/development/python-modules/wikipedia2vec/default.nix
@@ -1,7 +1,7 @@
 { lib
 , buildPythonPackage
 , click
-, cython_3
+, cython
 , fetchFromGitHub
 , jieba
 , joblib
@@ -30,13 +30,13 @@ buildPythonPackage rec {
   };
 
   nativeBuildInputs = [
-    cython_3
+    cython
     setuptools
   ];
 
   propagatedBuildInputs = [
     click
-    cython_3
+    cython
     jieba
     joblib
     lmdb
diff --git a/pkgs/development/python-modules/yarl/default.nix b/pkgs/development/python-modules/yarl/default.nix
index 6b8e17d2ed19..a0c75cd23856 100644
--- a/pkgs/development/python-modules/yarl/default.nix
+++ b/pkgs/development/python-modules/yarl/default.nix
@@ -2,7 +2,7 @@
 , buildPythonPackage
 , fetchPypi
 , pythonOlder
-, cython_3
+, cython
 , expandvars
 , setuptools
 , idna
@@ -30,7 +30,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     expandvars
     setuptools
   ];
diff --git a/pkgs/development/python-modules/zeroconf/default.nix b/pkgs/development/python-modules/zeroconf/default.nix
index c721259efa43..c592ca1d68cc 100644
--- a/pkgs/development/python-modules/zeroconf/default.nix
+++ b/pkgs/development/python-modules/zeroconf/default.nix
@@ -1,5 +1,5 @@
 { lib
-, cython_3
+, cython
 , async-timeout
 , buildPythonPackage
 , fetchFromGitHub
@@ -32,7 +32,7 @@ buildPythonPackage rec {
   '';
 
   nativeBuildInputs = [
-    cython_3
+    cython
     poetry-core
     setuptools
   ];
diff --git a/pkgs/development/tools/steamos-devkit/default.nix b/pkgs/development/tools/steamos-devkit/default.nix
index 4b2cabac6396..894bfff77da8 100644
--- a/pkgs/development/tools/steamos-devkit/default.nix
+++ b/pkgs/development/tools/steamos-devkit/default.nix
@@ -23,7 +23,7 @@ let
     };
 
     nativeBuildInputs = with python3.pkgs; [
-      cython
+      cython_0
       pkg-config
       SDL2
     ];
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 797b2ecae5f6..4e64f23b43f0 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -257,7 +257,7 @@ let
         };
 
         nativeBuildInputs = with self; [
-          cython_3
+          cython
           setuptools
           libxml2.dev
           libxslt.dev
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 4bca4de4f593..a7aa3534f3c3 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2613,14 +2613,7 @@ self: super: with self; {
 
   cython = callPackage ../development/python-modules/cython { };
 
-  cython_3 = self.cython.overridePythonAttrs (old: rec {
-    version = "3.0.9";
-    src = old.src.override {
-      inherit version;
-      hash = "sha256-otNU8FnR8FXTTPqmLFtovHisLOq2QHFI1H+1CM87pPM=";
-    };
-    patches = [ ];
-  });
+  cython_0 = callPackage ../development/python-modules/cython/0.nix { };
 
   cython-test-exception-raiser = callPackage ../development/python-modules/cython-test-exception-raiser { };