anchor.diff:      "--with-dri-driverdir=$(drivers)/lib/dri"
       "--with-dri-searchpath=${driverLink}/lib/dri"
       "--with-egl-platforms=x11,wayland,drm"
  -  ]
  -    ++ optionals (stdenv.system != "armv7l-linux") [
  -      "--with-gallium-drivers=svga,i915,ilo,r300,r600,radeonsi,nouveau,freedreno,swrast"
  +  ] ++ (if stdenv.isArm || stdenv.isAarch64 then [
  +      "--with-gallium-drivers=nouveau,freedreno,vc4,swrast"
  +      "--with-dri-drivers=nouveau,swrast"
  +  ] else [
  +      "--with-gallium-drivers=svga,i915,ilo,r300,r600,radeonsi,nouveau,swrast"
         "--with-dri-drivers=i915,i965,nouveau,radeon,r200,swrast"
         "--with-vulkan-drivers=intel"
  -  ]
  -    ++ [
  +  ]) ++ [
       (enableFeature enableTextureFloats "texture-float")
       (enableFeature grsecEnabled "glx-rts")
       (enableFeature stdenv.isLinux "dri3")
  
positive.code:       $out/lib/libxatracker* \
        $out/lib/libvulkan_*
  
      # move share/vulkan/icd.d/
      mv $out/share/ $drivers/
      # Update search path used by Vulkan (it's pointing to $out but
      # drivers are in $drivers)
      for js in $drivers/share/vulkan/icd.d/*.json; do
        substituteInPlace "$js" --replace "$out" "$drivers"
      done
  
      mv $out/lib/dri/* $drivers/lib/dri # */
      rmdir "$out/lib/dri"
  
  
negative.code: 
      # set the default search path for DRI drivers; used e.g. by X server
      substituteInPlace "$dev/lib/pkgconfig/dri.pc" --replace '$(drivers)' "${driverLink}"
    '' + optionalString (!(stdenv.isArm || stdenv.isAarch64)) ''
      # move share/vulkan/icd.d/
      mv $out/share/ $drivers/
      # Update search path used by Vulkan (it's pointing to $out but
      # drivers are in $drivers)
      for js in $drivers/share/vulkan/icd.d/*.json; do
        substituteInPlace "$js" --replace "$out" "$drivers"
      done
    '';
  
    # TODO:
  