sfml: comment the cf-private workaround

pkgs/development/libraries/sfml/default.nix

···
 { stdenv, fetchzip, cmake, libX11, freetype, libjpeg, openal, flac, libvorbis
 , glew, libXrandr, libXrender, udev, xcbutilimage
-, darwin, IOKit, Foundation, AppKit, OpenAL
+, cf-private, IOKit, Foundation, AppKit, OpenAL
 }:
 
 let
···
   buildInputs = [ freetype libjpeg openal flac libvorbis glew ]
     ++ stdenv.lib.optional stdenv.isLinux udev
     ++ stdenv.lib.optionals (!stdenv.isDarwin) [ libX11 libXrandr libXrender xcbutilimage ]
-    ++ stdenv.lib.optionals stdenv.isDarwin [ IOKit Foundation AppKit OpenAL darwin.cf-private ];
+    ++ stdenv.lib.optionals stdenv.isDarwin [ IOKit Foundation AppKit OpenAL
+    # Needed for _NSDefaultRunLoopMode, _OBJC_CLASS_$_NSArray, _OBJC_CLASS_$_NSDate
+    cf-private
+    ];
 
   cmakeFlags = [ "-DSFML_INSTALL_PKGCONFIG_FILES=yes"
                  "-DSFML_MISC_INSTALL_PREFIX=share/SFML"

pkgs/top-level/all-packages.nix

···
 
   sfml = callPackage ../development/libraries/sfml {
     inherit (darwin.apple_sdk.frameworks) IOKit Foundation AppKit OpenAL;
+    inherit (darwin) cf-private;
   };
   csfml = callPackage ../development/libraries/csfml { };