anchor.diff:      libpng
       nlohmann_json
       python.pkgs.numpy
  +    tbb
     ]
     ++ lib.optionals (!stdenv.isDarwin) [ libX11 libXpm libXft libXext libGLU libGL ]
     ++ lib.optionals (stdenv.isDarwin) [ Cocoa CoreSymbolication OpenGL ]
  
positive.code:     "-Dfftw3=OFF"
      "-Dfitsio=OFF"
      "-Dfortran=OFF"
      "-Dimt=OFF"
      "-Dgfal=OFF"
      "-Dgviz=OFF"
      "-Dhdfs=OFF"
  
negative.code: , libjpeg
  , libtiff
  , libpng
  , tbb
  , Cocoa
  , CoreSymbolication
  , OpenGL
  