anchor.diff:  , libelf, libvdpau
   , libglvnd, libunwind
   , galliumDrivers ? ["auto"]
  -, driDrivers ? ["auto"]
   , vulkanDrivers ? ["auto"]
   , eglPlatforms ? [ "x11" ] ++ lib.optionals stdenv.isLinux [ "wayland" ]
   , OpenGL, Xplugin
  
positive.code:     "-Ddri-search-path=${libglvnd.driverLink}/lib/dri"
  
      "-Dplatforms=${concatStringsSep "," eglPlatforms}"
      "-Ddri-drivers=${concatStringsSep "," driDrivers}"
      "-Dgallium-drivers=${concatStringsSep "," galliumDrivers}"
      "-Dvulkan-drivers=${concatStringsSep "," vulkanDrivers}"
  
  
negative.code: let
    # Release calendar: https://www.mesa3d.org/release-calendar.html
    # Release frequency: https://www.mesa3d.org/releasing.html#schedule
    version = "22.0.1";
    branch  = versions.major version;
  
  self = stdenv.mkDerivation {
  