anchor.diff:      inherit driverDir;
   
       srcVerification = fetchurl {
  +      inherit (src)
  +        outputHash
  +        outputHashAlgo
  +        urls;
  +      fullOpts = {
  +        sha1Urls = map (n: "${n}.sha1sum") src.urls;
  +      };
         failEarly = true;
  -      sha1Url = map (n: "${n}.sha1sum") src.urls;
  -      inherit (src) urls outputHash outputHashAlgo;
       };
     };
   
  
positive.code: }:
  
  let
    inherit (lib)
      boolEn;
  
    driverDir = "${opengl-dummy.driverSearchPath}/lib/dri";
  
    version = "2.2.0";
  in
  stdenv.mkDerivation rec {
    name = "libva-${version}";
  
negative.code: 
    configureFlags = [
      "--enable-x11"
      "--enable-glx"
      "--enable-wayland"
      "--enable-va-messaging"
      "--with-drivers-path=${driverDir}"
    ];
  
    #mesonFlags = [
    #  "-Ddriverdir=${driverDir}"
    #  "-Dwith_x11=yes"
    #  "-Dwith_glx=yes"
    #  "-Dwith_wayland=yes"
    #];
  
    preInstall = ''
      installFlagsArray+=("LIBVA_DRIVERS_PATH=$out/lib/dri")
  