anchor.diff:  
       srcVerification = fetchurl {
         failEarly = true;
  -      pgpsigUrls = map (n: "${n}.sig") src.urls;
  -      pgpKeyFingerprints = [
  -        "8703 B670 0E7E E06D 7A39  B8D6 EDAE 37B0 2CEB 490D"
  -        "946D 09B5 E4C9 845E 6307  5FF1 D961 C596 A720 3456"
  -        "E3E8 F480 C52A DD73 B278  EE78 E1EC BE07 D7D7 0895"
  -        "71C4 B756 20BC 7570 8B4B  DB25 4C95 FAAB 3EB0 73EC"
  -      ];
  -      inherit (src) urls outputHash outputHashAlgo;
  +      inherit (src)
  +        urls
  +        outputHash
  +        outputHashAlgo;
  +      fullOpts = {
  +        pgpsigUrls = map (n: "${n}.sig") src.urls;
  +        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"
  +          "71C4 B756 20BC 7570 8B4B  DB25 4C95 FAAB 3EB0 73EC"
  +        ];
  +      };
       };
     } // optionalAttrs (buildConfig == "opengl-dummy") {
       # opengl-dummy
  
positive.code:     libxdamage
      libxext
      libxfixes
      libxshmfence
      xorg.libXxf86vm
      wayland
  
negative.code: , libxdamage
  , libxext
  , libxfixes
  , libxrandr
  , libxshmfence
  , llvm
  , lm-sensors
  