warzone2100: set platforms to all, mark darwin as broken

It's supposed to work on darwin too, but the cmake file for darwin tries
to download stuff

pkgs/games/warzone2100/default.nix

@@ -60,6 +60,7 @@ stdenv.mkDerivation rec {
     freetype
     harfbuzz
     sqlite
+  ] ++ lib.optionals (!stdenv.isDarwin) [
     vulkan-headers
     vulkan-loader
   ];
@@ -93,7 +94,7 @@ stdenv.mkDerivation rec {
     #
     # Alternatively, we could have set CMAKE_INSTALL_BINDIR to "bin".
     "-DCMAKE_INSTALL_DATAROOTDIR=${placeholder "out"}/share"
-  ];
+  ] ++ lib.optional stdenv.isDarwin "-P../configure_mac.cmake";
 
   postInstall = lib.optionalString withVideos ''
     cp ${sequences_src} $out/share/warzone2100/sequences.wz
@@ -115,6 +116,9 @@ stdenv.mkDerivation rec {
     homepage = "http://wz2100.net";
     license = licenses.gpl2Plus;
     maintainers = with maintainers; [ astsmtl fgaz ];
-    platforms = platforms.linux;
+    platforms = platforms.all;
+    # configure_mac.cmake tries to download stuff
+    # https://github.com/Warzone2100/warzone2100/blob/master/macosx/README.md
+    broken = stdenv.isDarwin;
   };
 }