anchor.diff:  
     django_1_7 = buildPythonPackage rec {
       name = "Django-${version}";
  -    version = "1.7.7";
  +    version = "1.7.9";
       disabled = pythonOlder "2.7";
   
       src = pkgs.fetchurl {
         url = "http://www.djangoproject.com/m/releases/1.7/${name}.tar.gz";
  -      sha256 = "0crfpnf246c25887by2fjlxinp4rnhya4ksqfydcls9m0s9gh5j8";
  +      sha256 = "0q3q46yjjsqwp0ywrkbqwiac13rdvzrd5dchdbnzh3yjwpj9ygsg";
       };
   
       # error: invalid command 'test'
  
positive.code: 
    django_1_4 = buildPythonPackage rec {
      name = "Django-${version}";
      version = "1.4.20";
  
      src = pkgs.fetchurl {
        url = "http://www.djangoproject.com/m/releases/1.4/${name}.tar.gz";
        sha256 = "1cgb23afinmbvbaryvy3yj5m40h68mq6gvadcqyv3j64cja73b2q";
      };
  
      # error: invalid command 'test'
  
negative.code: 
    django_1_8 = buildPythonPackage rec {
      name = "Django-${version}";
      version = "1.8.3";
      disabled = pythonOlder "2.7";
  
      src = pkgs.fetchurl {
        url = "http://www.djangoproject.com/m/releases/1.8/${name}.tar.gz";
        sha256 = "1fjv63rdm45j5057zb7qj4ya4pjwig1jpbwcr0bk1mazq3y59dib";
      };
  
      # error: invalid command 'test'
  