anchor.diff:        glib gtk2 dbus_glib
         libXScrnSaver libXcursor libXtst mesa
         pciutils protobuf speechd libXdamage
  -      python2Packages.ply python2Packages.jinja2
       ] ++ optional gnomeKeyringSupport libgnome_keyring3
         ++ optionals gnomeSupport [ gnome.GConf libgcrypt ]
         ++ optional enableSELinux libselinux
  
positive.code: 
      nativeBuildInputs = [ gn which python2Packages.python perl pkgconfig ];
  
      buildInputs = defaultDependencies ++ [
        nspr nss systemd
        utillinux alsaLib
  
negative.code: 
      buildPhase = let
        buildCommand = target: ''
          ninja -C "${buildPath}"  \
            -j$NIX_BUILD_CORES -l$NIX_BUILD_CORES \
            "${target}"
        '' + optionalString (target == "mksnapshot" || target == "chrome") ''
  