anchor.diff:  #
   #  lessc = callPackage ../development/compilers/lessc { };
   #
  -  llvmPackages = recurseIntoAttrs llvmPackages_37;
  +  llvmPackages = recurseIntoAttrs (callPackageAlias "llvmPackages_37" { });
   #
     llvmPackages_37 = callPackage ../development/compilers/llvm/3.7 {
       inherit (stdenvAdapters) overrideCC;
  
positive.code: #
    gnu-efi = callPackage ../development/libraries/gnu-efi { };
  
    gnutls = gnutls34;
  
    gnutls34 = callPackage ../development/libraries/gnutls/3.4.nix {
      guileBindings = config.gnutls.guile or false;
  
negative.code: #    java = jre;
  #  };
  #
    qrencode = callPackage ../tools/graphics/qrencode { };
  #
    gecko_mediaplayer = callPackage ../applications/networking/browsers/mozilla-plugins/gecko-mediaplayer {
      inherit (gnome) GConf;
  