ws4py: add git to checkInputs

(cherry picked from commit 3f5f208d1390c79bbcb74f52a0e422c1d5ecf2c0)

pkgs/development/python-modules/ws4py/default.nix

···
+{ stdenv, buildPythonPackage, fetchPypi, pytest, mock, git, asyncio
+, cherrypy, gevent, tornado }:
+
+buildPythonPackage rec {
+  name = "${pname}-${version}";
+  pname = "ws4py";
+  version = "0.4.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0zr3254ky6r7q15l3dhdczfa8i723055zdkqssjifsgcwvirriks";
+  };
+
+  checkInputs = [ pytest mock git ];
+  propagatedBuildInputs = [ asyncio cherrypy gevent tornado ];
+
+  checkPhase = ''
+    pytest test
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = https://ws4py.readthedocs.org;
+    description = "A WebSocket package for Python";
+    maintainers = with maintainers; [ rickynils ];
+  };
+}

pkgs/top-level/python-packages.nix

···
     };
   };
 
-  ws4py = buildPythonPackage rec {
-    name = "${pname}-${version}";
-    pname = "ws4py";
-    version = "0.4.2";
-
-    src = fetchPypi {
-      inherit pname version;
-      sha256 = "0zr3254ky6r7q15l3dhdczfa8i723055zdkqssjifsgcwvirriks";
-    };
-
-    buildInputs = with self; [ pytest mock ];
-    propagatedBuildInputs = with self; [ asyncio cherrypy gevent tornado ];
-
-    checkPhase = ''
-      pytest test
-    '';
-
-    meta = {
-      homepage = https://ws4py.readthedocs.org;
-      description = "A WebSocket package for Python";
-      maintainers = with maintainers; [ rickynils ];
-    };
-  };
+  ws4py = callPackage ../development/python-modules/ws4py {};
 
   gdata = buildPythonPackage rec {
     name = "gdata-${version}";