blender: fix build on darwin

We don't compile blender with alembic. The linux build is able to detect
that, but this is not done for darwin. This explicitly disables alembic
to fix blender build on darwin.

pkgs/applications/misc/blender/default.nix

@@ -75,7 +75,9 @@ stdenv.mkDerivation rec {
     '';
 
   cmakeFlags =
-    [ "-DWITH_MOD_OCEANSIM=ON"
+    [
+      "-DWITH_ALEMBIC=OFF"
+      "-DWITH_MOD_OCEANSIM=ON"
       "-DWITH_CODEC_FFMPEG=ON"
       "-DWITH_CODEC_SNDFILE=ON"
       "-DWITH_INSTALL_PORTABLE=OFF"