diff --git a/pkgs/development/python-modules/oslo-utils/ctypes.patch b/pkgs/development/python-modules/oslo-utils/ctypes.patch
deleted file mode 100644
index bed62535a80f..000000000000
--- a/pkgs/development/python-modules/oslo-utils/ctypes.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-diff --git a/oslo_utils/secretutils.py b/oslo_utils/secretutils.py
-index 3183865..83e00e8 100644
---- a/oslo_utils/secretutils.py
-+++ b/oslo_utils/secretutils.py
-@@ -46,13 +46,10 @@ def md5(string=b'', usedforsecurity=True):
-     return hashlib.md5(string, usedforsecurity=usedforsecurity)  # nosec
- 
- 
--if ctypes.util.find_library("crypt"):
--    _libcrypt = ctypes.CDLL(ctypes.util.find_library("crypt"), use_errno=True)
--    _crypt = _libcrypt.crypt
--    _crypt.argtypes = (ctypes.c_char_p, ctypes.c_char_p)
--    _crypt.restype = ctypes.c_char_p
--else:
--    _crypt = None
-+_libcrypt = ctypes.CDLL("@crypt@", use_errno=True)
-+_crypt = _libcrypt.crypt
-+_crypt.argtypes = (ctypes.c_char_p, ctypes.c_char_p)
-+_crypt.restype = ctypes.c_char_p
- 
- 
- def crypt_mksalt(method):
diff --git a/pkgs/development/python-modules/oslo-utils/default.nix b/pkgs/development/python-modules/oslo-utils/default.nix
index 9da2e71d149e..167fa70622d9 100644
--- a/pkgs/development/python-modules/oslo-utils/default.nix
+++ b/pkgs/development/python-modules/oslo-utils/default.nix
@@ -11,7 +11,6 @@
   debtcollector,
   iso8601,
   netaddr,
-  netifaces,
   oslo-i18n,
   packaging,
   psutil,
@@ -29,7 +28,6 @@
   oslotest,
   pyyaml,
   qemu-utils,
-  replaceVars,
   stdenv,
   stestr,
   testscenarios,
@@ -37,26 +35,27 @@
 
 buildPythonPackage rec {
   pname = "oslo-utils";
-  version = "9.1.0";
+  version = "9.2.0";
   pyproject = true;
 
   src = fetchPypi {
     pname = "oslo_utils";
     inherit version;
-    hash = "sha256-AcOHXnzKAFtZRlxCn0ZxE7X0sEIRy9U0yawvFSJ207M=";
+    hash = "sha256-H0IAbea5KRoDBQJfXM24kHEg2I7X68N4ShRyozKASKs=";
   };
 
-  patches = [
-    (replaceVars ./ctypes.patch {
-      crypt = "${lib.getLib libxcrypt-legacy}/lib/libcrypt${stdenv.hostPlatform.extensions.sharedLibrary}";
-    })
-  ];
+  postPatch =
+    let
+      soext = stdenv.hostPlatform.extensions.sharedLibrary;
+    in
+    ''
+      substituteInPlace oslo_utils/secretutils.py \
+        --replace-fail "ctypes.util.find_library(\"crypt\")" '"${lib.getLib libxcrypt-legacy}/lib/libcrypt${soext}"'
 
-  postPatch = ''
-    # only a small portion of the listed packages are actually needed for running the tests
-    # so instead of removing them one by one remove everything
-    rm test-requirements.txt
-  '';
+      # only a small portion of the listed packages are actually needed for running the tests
+      # so instead of removing them one by one remove everything
+      rm test-requirements.txt
+    '';
 
   build-system = [
     pbr
@@ -67,7 +66,6 @@ buildPythonPackage rec {
     debtcollector
     iso8601
     netaddr
-    netifaces
     oslo-i18n
     packaging
     psutil