anchor.diff:  
     gifsicle = callPackage ../tools/graphics/gifsicle { };
   
  -  gitlab = callPackage ../applications/version-management/gitlab {
  -    libiconv = libiconvOrLibc;
  -  };
  -
  -  gitlab-shell = callPackage ../applications/version-management/gitlab-shell { };
  +  # Evaluation broken by recent ruby changes.
  +  # gitlab = callPackage ../applications/version-management/gitlab {
  +  #  libiconv = libiconvOrLibc;
  +  # };
  +
  +  # Evaluation broken by recent ruby changes.
  +  # gitlab-shell = callPackage ../applications/version-management/gitlab-shell { };
   
     glusterfs = callPackage ../tools/filesystems/glusterfs { };
   
  
positive.code: 
    fsharp = callPackage ../development/compilers/fsharp {};
  
    gem-nix = callPackage ../tools/package-management/gem-nix { };
  
    go_1_0 = callPackage ../development/compilers/go { };
  
  
negative.code:   };
    defaultGemConfig = callPackage ../development/interpreters/ruby/bundler-env/default-gem-config.nix { };
    buildRubyGem = callPackage ../development/interpreters/ruby/gem.nix { };
    # Evaluation broken by recent ruby changes.
    # loadRubyEnv = callPackage ../development/interpreters/ruby/load-ruby-env.nix { };
    bundlerEnv = callPackage ../development/interpreters/ruby/bundler-env { };
  
    ruby_1_8_7 = callPackage ../development/interpreters/ruby/ruby-1.8.7.nix { };
  