anchor.diff:    buildInputs = [
       audit_lib
       dbus
  +    egl-wayland
  +    xorg.fontutil
       libbsd
       libdmx
       libdrm
  
positive.code:   ];
  
    postPatch = optionalString (versionAtLeast channel "1.20") ''
      # Xwin is an unconditional dependency.
      sed -i include/meson.build \
        -e '/xwin-config.h/,+2 d'
  
negative.code:       sha256 = "a732502f1db000cf36a376cd0c010ffdbf32ecdd7f1fa08ba7f5bdf9601cc197";
      };
      "1.20" = {
        version = "1.20.0";
        sha256 = "9d967d185f05709274ee0c4f861a4672463986e550ca05725ce27974f550d3e6";
      };
    };
    source = sources."${channel}";
  