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_8 = buildPythonPackage rec {
      name = "Django-${version}";
      version = "1.8";
      disabled = pythonOlder "2.7";
  
      src = pkgs.fetchurl {
        url = "http://www.djangoproject.com/m/releases/1.8/${name}.tar.gz";
        sha256 = "04mlx3920r46vn69alrf4bmv1xqp7m6k1xzwgr798rjcrd1assq6";
      };
  
      # error: invalid command 'test'
  
negative.code: 
    django_1_4 = buildPythonPackage rec {
      name = "Django-${version}";
      version = "1.4.21";
  
      src = pkgs.fetchurl {
        url = "http://www.djangoproject.com/m/releases/1.4/${name}.tar.gz";
        sha256 = "1x5wk3yh6ydbp4sgsxl4qjmdvcazphwkmmm99lfdb04645sijkwk";
      };
  
      # error: invalid command 'test'
  