diff --git a/pkgs/development/python-modules/semver/default.nix b/pkgs/development/python-modules/semver/default.nix
new file mode 100644
index 00000000000..285da546071
--- /dev/null
+++ b/pkgs/development/python-modules/semver/default.nix
@@ -0,0 +1,19 @@
+{ stdenv, fetchPypi, buildPythonPackage }:
+
+buildPythonPackage rec {
+  name = "${pname}-${version}";
+  pname = "semver";
+  version = "2.2.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "161gvsfpw0l8lnf1v19rvqc8b9f8n70cc8ppya4l0n6rwc1c1n4m";
+  };
+
+  meta = with stdenv.lib; {
+    description = "Python package to work with Semantic Versioning (http://semver.org/)";
+    homepage = "https://github.com/k-bx/python-semver";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ np ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 37a04872e9c..f0450ca3e48 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -29640,28 +29640,7 @@ EOF
 
   ecpy = callPackage ../development/python-modules/ecpy { };
 
-  trezor = callPackage ../development/python-modules/trezor { };
-
-  semver = buildPythonPackage rec {
-    name = "semver-${version}";
-    version = "2.2.1";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/s/semver/${name}.tar.gz";
-      sha256 = "161gvsfpw0l8lnf1v19rvqc8b9f8n70cc8ppya4l0n6rwc1c1n4m";
-    };
-
-    meta = {
-      description = "Python package to work with Semantic Versioning (http://semver.org/)";
-      homepage = "https://github.com/k-bx/python-semver";
-      license = licenses.bsd3;
-      maintainers = with maintainers; [ np ];
-    };
-  };
-
-  ed25519 = buildPythonPackage rec {
-    name = "ed25519-${version}";
-    version = "1.4";
+  semver = callPackage ../development/python-modules/semver { };
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/e/ed25519/${name}.tar.gz";