anchor.diff:  , openssl
   , libdrm
   , libevent
  +, libyaml
   , lttng-ust
   , gst_all_1
   , gtest
  
positive.code: 
  stdenv.mkDerivation {
    pname = "libcamera";
    version = "unstable-2022-01-03";
  
    src = fetchgit {
      url = "https://git.libcamera.org/libcamera/libcamera.git";
      rev = "1db1e31e664c1f613dc964d8519fe75d67b154b6";
      hash = "sha256-pXYPIU9xDWA870Gp1Jgizi5xnUHRvTqEq/ofFXdVZdg=";
    };
  
    postPatch = ''
  
negative.code: 
      # lttng tracing
      lttng-ust
  
      # yamlparser
      libyaml
  
      gtest
    ];
  