anchor.diff:      optionalString
       splitString;
   
  -  version = "17.1.1";
  +  version = "17.1.2";
   
     # this is the default search path for DRI drivers
     driverSearchPath = "/run/opengl-driver-${stdenv.targetSystem}";
  
positive.code:         + head (splitString "." version)
          + ".x/${version}/mesa-${version}.tar.xz")
      ];
      multihash = "QmPcBF2ExKEfjyATeps9xiJRzQ3TVhArYv9gz3C2R4UST4";
      hashOutput = false;  # Provided by upstream directly
      sha256 = "aed503f94c0c1630a162a3e276f4ee12a86764cee4cb92338ea2dea99a04e7ef";
    };
  
    nativeBuildInputs = [
  
negative.code:       pgpKeyFingerprints = [
          "8703 B670 0E7E E06D 7A39  B8D6 EDAE 37B0 2CEB 490D"
          "946D 09B5 E4C9 845E 6307  5FF1 D961 C596 A720 3456"
          "E3E8 F480 C52A DD73 B278  EE78 E1EC BE07 D7D7 0895"
        ];
        inherit (src) urls outputHash outputHashAlgo;
      };
  