anchor.diff:    meta = with stdenv.lib; {
       homepage = "https://01.org/linuxmedia";
       license = licenses.mit;
  -    description = "Intel driver for the VAAPI library";
  -    platforms = platforms.unix;
  -    maintainers = with maintainers; [ ];
  +    description = "VA-API user mode driver for Intel GEN Graphics family";
  +    longDescription = ''
  +      This VA-API video driver backend provides a bridge to the GEN GPUs through
  +      the packaging of buffers and commands to be sent to the i915 driver for
  +      exercising both hardware and shader functionality for video decode,
  +      encode, and processing.
  +      VA-API is an open-source library and API specification, which provides
  +      access to graphics hardware acceleration capabilities for video
  +      processing. It consists of a main library and driver-specific acceleration
  +      backends for each supported hardware vendor.
  +    '';
  +    platforms = [ "x86_64-linux" "i686-linux" ];
  +    maintainers = with maintainers; [ primeos ];
     };
   }
  
positive.code:     sha256 = "1cidki3av9wnkgwi7fklxbg3bh6kysf8w3fk2qadjr05a92mx3zp";
    };
  
    patchPhase = ''
      patchShebangs ./src/shaders/gpp.py
    '';
  
    preConfigure = ''
      sed -i -e "s,LIBVA_DRIVERS_PATH=.*,LIBVA_DRIVERS_PATH=$out/lib/dri," configure
    '';
  
    postInstall = stdenv.lib.optionalString enableHybridCodec ''
      ln -s ${vaapi-intel-hybrid}/lib/dri/* $out/lib/dri/
    '';
  
    configureFlags = [
      "--enable-drm"
      "--enable-x11"
      "--enable-wayland"
    ] ++ stdenv.lib.optional enableHybridCodec "--enable-hybrid-codec";
  
    nativeBuildInputs = [ autoreconfHook gnum4 pkgconfig python2 ];
  
    buildInputs = [ intel-gpu-tools libdrm libva libX11 libXext libGL wayland ]
      ++ stdenv.lib.optional enableHybridCodec vaapi-intel-hybrid;
  
negative.code: { stdenv, fetchFromGitHub, autoreconfHook, gnum4, pkg-config, python3
  , intel-gpu-tools, libdrm, libva, libX11, libGL, wayland, libXext
  , enableHybridCodec ? false, vaapi-intel-hybrid
  }:
  