anchor.diff:      rev = "v${version}";
       owner = "ostreedev";
       repo = "ostree";
  -    sha256 = "0kk04pznk6m6fqdz609m2zcnkalcw9q8fsx8wm42k6dhf6cw7l3g";
  +    sha256 = "0i7b7hvlv8m44k39fr5389wskf810vda8s7ivy2whj1nan5951yx";
     };
   
     patches = [
  
positive.code:     env NOCONFIGURE=1 ./autogen.sh
    '';
  
    configureFlags = [
      "--with-systemdsystemunitdir=$(out)/lib/systemd/system"
      "--with-systemdsystemgeneratordir=$(out)/lib/systemd/system-generators"
  
negative.code: }:
  
  let
    version = "2018.8";
  
    libglnx-src = fetchFromGitHub {
      owner = "GNOME";
      repo = "libglnx";
      rev = "470af8763ff7b99bec950a6ae0a957c1dcfc8edd";
      sha256 = "1fwik38i6w3r6pn4qkizradcqp1m83n7ljh9jg0y3p3kvrbfxh15";
    };
  
    bsdiff-src = fetchFromGitHub {
  