anchor.diff:      "-Dlibav=disabled"
       "-Dlibv4l=disabled"
       "-Dlibv4l2=disabled"
  -    "-Dumfpack=disabled"
       # Disabled due to multiple vulnerabilities, see
       # https://github.com/NixOS/nixpkgs/pull/73586
       "-Djasper=disabled"
  
positive.code: , luajit
  , openexr
  , OpenCL
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:     gexiv2
      luajit
      openexr
      suitesparse
    ] ++ stdenv.lib.optional stdenv.isDarwin OpenCL;
  
    # for gegl-4.0.pc
  