anchor.diff:    # TODO: Figure out how to enable opencl without having a runtime dependency on clang
     mesonFlags = [
       "--sysconfdir=/etc"
  +    "--datadir=${placeholder "drivers"}/share" # Vendor files
   
       # Don't build in debug mode
       # https://gitlab.freedesktop.org/mesa/mesa/blob/master/docs/meson.html#L327
  
positive.code:     substituteInPlace meson.build --replace \
        "find_program('pkg-config')" \
        "find_program('${buildPackages.pkg-config.targetPrefix}pkg-config')"
    '';
  
    outputs = [ "out" "dev" "drivers" ] ++ lib.optional enableOSMesa "osmesa";
  
negative.code:       # Move other drivers to a separate output
        mv $out/lib/lib*_mesa* $drivers/lib
      fi
  
      # Update search path used by glvnd
      for js in $drivers/share/glvnd/egl_vendor.d/*.json; do
  