anchor.diff:      description = "Virtual lighttable and darkroom for photographers";
       homepage = https://www.darktable.org;
       license = licenses.gpl3Plus;
  -    platforms = platforms.linux;
  +    platforms = platforms.linux ++ platforms.darwin;
       maintainers = with maintainers; [ goibhniu flosse mrVanDalo ];
     };
   }
  
positive.code:     libwebp libsecret gnome3.adwaita-icon-theme osm-gps-map pcre isocodes
    ] ++ stdenv.lib.optionals stdenv.isLinux [
      colord colord-gtk libX11 ocl-icd
    ] ++ stdenv.lib.optional stdenv.isDarwin gtk-mac-integration;
  
    cmakeFlags = [
      "-DBUILD_USERMANUAL=False"
  
negative.code: , ilmbase, gtk3, intltool, lcms2, lensfun, libX11, libexif, libgphoto2, libjpeg
  , libpng, librsvg, libtiff, openexr, osm-gps-map, pkgconfig, sqlite, libxslt
  , openjpeg, lua, pugixml, colord, colord-gtk, libwebp, libsecret, gnome3
  , ocl-icd, pcre, gtk-mac-integration, isocodes, llvmPackages
  }:
  
  stdenv.mkDerivation rec {
  