anchor.diff:      meta = { license = gpl3Plus; };
     };
   
  +  tuareg = melpaBuild rec {
  +    pname = "tuareg";
  +    version = "2.0.9";
  +    src = fetchFromGitHub {
  +      owner  = "ocaml";
  +      repo   = pname;
  +      rev    = version;
  +      sha256 = "1j2smhqrwy0zydhbyjkpnwzq05fgfa85kc0d9kzwq0mppdndspp4";
  +    };
  +    packageRequires = [ caml ];
  +    meta = { license = gpl3Plus; };
  +  };
  +
     undo-tree = melpaBuild rec {
       pname   = "undo-tree";
       version = "0.6.4";
  
positive.code:     meta = { license = gpl3Plus; };
    };
  
    gnus = melpaBuild rec {
      pname   = "gnus";
      version = "20140501";
  
negative.code: 
    use-package = melpaBuild rec {
      pname   = "use-package";
      version = "20150317";
      src = fetchFromGitHub {
        owner  = "jwiegley";
        repo   = pname;
        rev    = "b836266ddfbc835efdb327ecb389ff9e081d7c55";
        sha256 = "187wnqqm5g43cg8b6a9rbd9ncqad5fhjb96wjszbinjh1mjxyh7i";
      };
      packageRequires = [ bind-key diminish ];
      files = [ "use-package.el" ];
  