pythonPackages.pex: refactor move to python-modules

pkgs/development/python-modules/pex/default.nix

@@ -0,0 +1,29 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "pex";
+  version = "1.2.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1m0gx9182w1dybkyjwwjyd6i87x2dzv252ks2fj8yn6avlcp5z4q";
+  };
+
+  prePatch = ''
+    substituteInPlace setup.py --replace 'SETUPTOOLS_REQUIREMENT,' '"setuptools"'
+  '';
+
+  # A few more dependencies I don't want to handle right now...
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "A library and tool for generating .pex (Python EXecutable) files";
+    homepage = "https://github.com/pantsbuild/pex";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ copumpkin ];
+  };
+
+}

pkgs/top-level/python-packages.nix

@@ -2025,30 +2025,7 @@ in {
 
   peppercorn = callPackage ../development/python-modules/peppercorn { };
 
-  pex = buildPythonPackage rec {
+  pex = callPackage ../development/python-modules/pex { };
-    name = "pex-${version}";
-    version = "1.2.7";
-
-    src = self.fetchPypi {
-      pname  = "pex";
-      sha256 = "1m0gx9182w1dybkyjwwjyd6i87x2dzv252ks2fj8yn6avlcp5z4q";
-      inherit version;
-    };
-
-    prePatch = ''
-      substituteInPlace setup.py --replace 'SETUPTOOLS_REQUIREMENT,' '"setuptools"'
-    '';
-
-    # A few more dependencies I don't want to handle right now...
-    doCheck = false;
-
-    meta = {
-      description = "A library and tool for generating .pex (Python EXecutable) files";
-      homepage = "https://github.com/pantsbuild/pex";
-      license = licenses.asl20;
-      maintainers = with maintainers; [ copumpkin ];
-    };
-  };
 
   phe = callPackage ../development/python-modules/phe { };