wine64: fix eval on Darwin

On darwin, mesa doesn't have an osmesa output which means the attr is missing
which causes an eval error when building the package list (missing attr eval
errors are not recoverable).

OpenGL support should be covered by the darwin deps already, so these libraries
shouldn't be needed on Darwin.

pkgs/misc/emulators/wine/base.nix

@@ -74,7 +74,7 @@ stdenv.mkDerivation ((lib.optionalAttrs (buildScript != null) {
   ++ lib.optionals openclSupport [ pkgs.opencl-headers pkgs.ocl-icd ]
   ++ lib.optionals xmlSupport    [ pkgs.libxml2 pkgs.libxslt ]
   ++ lib.optionals tlsSupport    [ pkgs.openssl pkgs.gnutls ]
-  ++ lib.optionals openglSupport [ pkgs.libGLU pkgs.libGL pkgs.mesa.osmesa pkgs.libdrm ]
+  ++ lib.optionals (openglSupport && !stdenv.isDarwin) [ pkgs.libGLU pkgs.libGL pkgs.mesa.osmesa pkgs.libdrm ]
   ++ lib.optionals stdenv.isDarwin (with pkgs.buildPackages.darwin.apple_sdk.frameworks; [
      CoreServices Foundation ForceFeedback AppKit OpenGL IOKit DiskArbitration Security
      ApplicationServices AudioToolbox CoreAudio AudioUnit CoreMIDI OpenAL OpenCL Cocoa Carbon