diff --git a/pkgs/development/python-modules/bitlist/default.nix b/pkgs/development/python-modules/bitlist/default.nix
index 0744302e4af5..c4c715c4a959 100644
--- a/pkgs/development/python-modules/bitlist/default.nix
+++ b/pkgs/development/python-modules/bitlist/default.nix
@@ -2,38 +2,31 @@
   lib,
   buildPythonPackage,
   fetchPypi,
-  setuptools,
-  wheel,
   parts,
-  pytestCheckHook,
   pytest-cov-stub,
-  pythonOlder,
+  pytestCheckHook,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "bitlist";
-  version = "1.2.0";
+  version = "2.0.0";
   pyproject = true;
 
-  disabled = pythonOlder "3.7";
-
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-+/rBno+OH7yEiN4K9VC6BCEPuOv8nNp0hU+fWegjqPw=";
+    hash = "sha256-mbXSvIUYsnZy/pmZLFXa1bqrwK+JZ2eySuDRCVAs1zk=";
   };
 
-  build-system = [
-    setuptools
-    wheel
-  ];
-
   pythonRelaxDeps = [ "parts" ];
 
+  build-system = [ setuptools ];
+
   dependencies = [ parts ];
 
   nativeCheckInputs = [
-    pytestCheckHook
     pytest-cov-stub
+    pytestCheckHook
   ];
 
   pythonImportsCheck = [ "bitlist" ];
@@ -41,7 +34,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python library for working with little-endian list representation of bit strings";
     homepage = "https://github.com/lapets/bitlist";
-    license = with licenses; [ mit ];
+    license = licenses.mit;
     maintainers = with maintainers; [ fab ];
   };
 }
diff --git a/pkgs/development/python-modules/fe25519/default.nix b/pkgs/development/python-modules/fe25519/default.nix
index a19efc6be1c6..f6a399024203 100644
--- a/pkgs/development/python-modules/fe25519/default.nix
+++ b/pkgs/development/python-modules/fe25519/default.nix
@@ -13,14 +13,14 @@
 
 buildPythonPackage rec {
   pname = "fe25519";
-  version = "1.5.0";
+  version = "2.0.0";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-la+17tPHjceMTe7Wk8DGVaSptk8XJa+l7GTeqLIFDvs=";
+    hash = "sha256-Kf5OCTG3IL2dYGvzFngoS+OMZPqq/O//8Gf0a2McgPc=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/fountains/default.nix b/pkgs/development/python-modules/fountains/default.nix
index 8a5e4e923dfe..8d789b9b7c4c 100644
--- a/pkgs/development/python-modules/fountains/default.nix
+++ b/pkgs/development/python-modules/fountains/default.nix
@@ -3,29 +3,22 @@
   buildPythonPackage,
   fetchPypi,
   setuptools,
-  wheel,
   bitlist,
-  pythonOlder,
 }:
 
 buildPythonPackage rec {
   pname = "fountains";
-  version = "2.2.0";
-  format = "pyproject";
-
-  disabled = pythonOlder "3.7";
+  version = "3.0.0";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-MhOQ4pemxmjfp7Uy5hLA8i8BBI5QbvD4EjEcKMM/u3I=";
+    hash = "sha256-kRu+jCKRfkH0URNuYvTF3TF1WslyfeE2EHE1VLCMyys=";
   };
 
-  nativeBuildInputs = [
-    setuptools
-    wheel
-  ];
+  build-system = [ setuptools ];
 
-  propagatedBuildInputs = [ bitlist ];
+  dependencies = [ bitlist ];
 
   # Module has no test
   doCheck = false;
@@ -35,7 +28,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python library for generating and embedding data for unit testing";
     homepage = "https://github.com/reity/fountains";
-    license = with licenses; [ mit ];
+    license = licenses.mit;
     maintainers = with maintainers; [ fab ];
   };
 }
diff --git a/pkgs/development/python-modules/ge25519/default.nix b/pkgs/development/python-modules/ge25519/default.nix
index d8bf085d7142..695dbe7235dd 100644
--- a/pkgs/development/python-modules/ge25519/default.nix
+++ b/pkgs/development/python-modules/ge25519/default.nix
@@ -14,14 +14,14 @@
 
 buildPythonPackage rec {
   pname = "ge25519";
-  version = "1.5.1";
+  version = "2.0.0";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-VKDPiSdufWwrNcZSRTByFU4YGoJrm48TDm1nt4VyclA=";
+    hash = "sha256-eqduw1nMHMiMIvhzXA1Zg2foqQscQwFLhgm9aJYvmuo=";
   };
 
   build-system = [ setuptools ];