pythonPackages.cssutils: Move to own file

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

@@ -0,0 +1,22 @@
+{ stdenv, buildPythonPackage, fetchPypi, mock }:
+
+buildPythonPackage rec {
+  pname = "cssutils";
+  version = "1.0.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0qwha9x1wml2qmipbcz03gndnlwhzrjdvw9i09si247a90l8p8fq";
+  };
+
+  buildInputs = [ mock ];
+
+  # couple of failing tests
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "A Python package to parse and build CSS";
+    homepage = http://code.google.com/p/cssutils/;
+    license = licenses.lgpl3Plus;
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1997,27 +1997,7 @@ in {
 
   cssselect = callPackage ../development/python-modules/cssselect { };
 
-  cssutils = buildPythonPackage (rec {
+  cssutils = callPackage ../development/python-modules/cssutils { };
-    name = "cssutils-1.0.1";
-
-    src = pkgs.fetchurl {
-      url = mirror://pypi/c/cssutils/cssutils-1.0.1.tar.gz;
-      sha256 = "0qwha9x1wml2qmipbcz03gndnlwhzrjdvw9i09si247a90l8p8fq";
-    };
-
-    buildInputs = with self; [ self.mock ];
-
-    # couple of failing tests
-    doCheck = false;
-
-    meta = {
-      description = "A Python package to parse and build CSS";
-
-      homepage = http://code.google.com/p/cssutils/;
-
-      license = licenses.lgpl3Plus;
-    };
-  });
 
   darcsver = buildPythonPackage (rec {
     name = "darcsver-1.7.4";