anchor.diff:  
     git-commit-mode = melpaBuild rec {
       pname = "git-commit-mode";
  -    version = "0.15.0";
  +    version = "1.0.0";
       src = fetchFromGitHub {
         owner  = "magit";
         repo   = "git-modes";
         rev    = version;
  -      sha256 = "1x03276yq63cddc89n8i47k1f6p26b7a5la4hz66fdf15gmr8496";
  +      sha256 = "12a1xs3w2dp1a55qhc01dwjkavklgfqnn3yw85dhi4jdz8r8j7m0";
       };
       files = [ "git-commit-mode.el" ];
       meta = { license = gpl3Plus; };
  
positive.code: 
    magit = melpaBuild rec {
      pname   = "magit";
      version = "20141025";
      src = fetchFromGitHub {
        owner  = "magit";
        repo   = "magit";
        rev    = "50c08522c8a3c67e0f3b821fe4df61e8bd456ff9";
        sha256 = "0mzyx72pidzvla1x2qszn3c60n2j0n8i5k875c4difvd1n4p0vsk";
      };
      packageRequires = [ git-commit-mode git-rebase-mode ];
      meta = { license = gpl3Plus; };
  
negative.code: 
    gitignore-mode = melpaBuild rec {
      pname = "gitignore-mode";
      version = "1.0.0";
      src = fetchFromGitHub {
        owner  = "magit";
        repo   = "git-modes";
        rev    = version;
        sha256 = "12a1xs3w2dp1a55qhc01dwjkavklgfqnn3yw85dhi4jdz8r8j7m0";
      };
      files = [ "gitignore-mode.el" ];
      meta = { license = gpl3Plus; };
  