anchor.diff:  
     django_1_4 = buildPythonPackage rec {
       name = "Django-${version}";
  -    version = "1.4.14";
  +    version = "1.4.20";
   
       src = pkgs.fetchurl {
         url = "http://www.djangoproject.com/m/releases/1.4/${name}.tar.gz";
  -      sha256 = "173ci9ml2vs1z2x51wahssfn8mrmhd02varmg9kibm8z460svvc1";
  +      sha256 = "1cgb23afinmbvbaryvy3yj5m40h68mq6gvadcqyv3j64cja73b2q";
       };
   
       # error: invalid command 'test'
  
positive.code:     };
    };
  
    django = self.django_1_6;
  
    django_1_7 = buildPythonPackage rec {
      name = "Django-${version}";
      version = "1.7.6";
  
      src = pkgs.fetchurl {
        url = "http://www.djangoproject.com/m/releases/1.7/${name}.tar.gz";
        sha256 = "142cim55wnv5q0zg039rankwah1gbpq46dgmp9yg78jrzq7mxwdh";
      };
  
      # error: invalid command 'test'
  
negative.code: 
    django_1_6 = buildPythonPackage rec {
      name = "Django-${version}";
      version = "1.6.11";
  
      src = pkgs.fetchurl {
        url = "http://www.djangoproject.com/m/releases/1.6/${name}.tar.gz";
        sha256 = "0misvia78c14y07zs5xsb9lv54q0v217jpaindrmhhw4wiryal3y";
      };
  
      # error: invalid command 'test'
  