anchor.diff:  
     }) // {inherit ;};
   
  -  xpr = (mkDerivation "xpr" {
  -    name = "xpr-1.0.4";
  -    src = fetchurl {
  -      url = mirror://xorg/individual/app/xpr-1.0.4.tar.bz2;
  -      sha256 = "1dbcv26w2yand2qy7b3h5rbvw1mdmdd57jw88v53sgdr3vrqvngy";
  -    };
  -    nativeBuildInputs = [ utilmacros ];
  -    buildInputs = [ libX11 libXmu xproto ];
  -
  -  }) // {inherit libX11 libXmu xproto ;};
  +  # xpr = (mkDerivation "xpr" {
  +  #   name = "xpr-1.0.4";
  +  #   src = fetchurl {
  +  #     url = mirror://xorg/individual/app/xpr-1.0.4.tar.bz2;
  +  #     sha256 = "1dbcv26w2yand2qy7b3h5rbvw1mdmdd57jw88v53sgdr3vrqvngy";
  +  #   };
  +  #   nativeBuildInputs = [ utilmacros ];
  +  #   buildInputs = [ libX11 libXmu xproto ];
  +  #
  +  # }) // {inherit libX11 libXmu xproto ;};
   
     xprop = (mkDerivation "xprop" {
       name = "xprop-1.2.2";
  
positive.code: 
    }) // {inherit ;};
  
    fontadobeutopia75dpi = (mkDerivation "fontadobeutopia75dpi" {
      name = "font-adobe-utopia-75dpi-1.0.4";
      src = fetchurl {
        url = mirror://xorg/individual/font/font-adobe-utopia-75dpi-1.0.4.tar.bz2;
        sha256 = "152wigpph5wvl4k9m3l4mchxxisgsnzlx033mn5iqrpkc6f72cl7";
      };
      nativeBuildInputs = [ bdftopcf fontutil mkfontdir mkfontscale utilmacros ];
      buildInputs = [ ];
  
negative.code: 
    }) // {inherit libX11 libXext xextproto xproto libXt ;};
  
    # libXprintAppUtil = (mkDerivation "libXprintAppUtil" {
    #   name = "libXprintAppUtil-1.0.1";
    #   src = fetchurl {
    #     url = mirror://xorg/individual/lib/libXprintAppUtil-1.0.1.tar.bz2;
    #     sha256 = "198ad7pmkp31vcs0iwd8z3vw08p69hlyjmzgk7sdny9k01368q14";
    #   };
    #   nativeBuildInputs = [ ];
    #   buildInputs = [ printproto libX11 libXau libXp libXprintUtil xproto ];
    #
    # }) // {inherit printproto libX11 libXau libXp libXprintUtil xproto ;};
  
    # libXprintUtil = (mkDerivation "libXprintUtil" {
    #   name = "libXprintUtil-1.0.1";
    #   src = fetchurl {
    #     url = mirror://xorg/individual/lib/libXprintUtil-1.0.1.tar.bz2;
    #     sha256 = "0v3fh9fqgravl8xl509swwd9a2v7iw38szhlpraiyq5r402axdkj";
    #   };
    #   nativeBuildInputs = [ ];
    #   buildInputs = [ printproto libX11 libXau libXp libXt ];
    #
    # }) // {inherit printproto libX11 libXau libXp libXt ;};
  
    libXvMC = (mkDerivation "libXvMC" {
      name = "libXvMC-1.0.10";
  