zeroad: Split data from binaries again

The rootdir patch was lost in the update to 0.0.24b. Adding it allows
hydra to build the game. It can't when the binaries depend on the data
since the data is too big for hydra.

pkgs/games/0ad/game.nix

@@ -2,7 +2,7 @@
 , pkg-config, spidermonkey_78, boost, icu, libxml2, libpng, libsodium
 , libjpeg, zlib, curl, libogg, libvorbis, enet, miniupnpc
 , openal, libGLU, libGL, xorgproto, libX11, libXcursor, nspr, SDL2
-, gloox, nvidia-texture-tools, zeroad-data
+, gloox, nvidia-texture-tools
 , withEditor ? true, wxGTK
 }:
 
@@ -50,6 +50,8 @@ stdenv.mkDerivation rec {
     "-I${fmt.dev}/include"
   ];
 
+  patches = [ ./rootdir_env.patch ];
+
   configurePhase = ''
     # Delete shipped libraries which we don't need.
     rm -rf libraries/source/{enet,miniupnpc,nvtt,spidermonkey}
@@ -62,7 +64,6 @@ stdenv.mkDerivation rec {
       ${lib.optionalString withEditor "--enable-atlas"} \
       --bindir="$out"/bin \
       --libdir="$out"/lib/0ad \
-      --datadir="$out"/share/0ad/data \
       --without-tests \
       -j $NIX_BUILD_CORES
     popd
@@ -85,11 +86,6 @@ stdenv.mkDerivation rec {
     # Copy l10n data.
     install -Dm755 -t $out/share/0ad/data/l10n binaries/data/l10n/*
 
-    # Link in game data from package
-    ln -s ${zeroad-data}/share/0ad/data/config $out/share/0ad/data/config
-    ln -s ${zeroad-data}/share/0ad/data/mods $out/share/0ad/data/mods
-    ln -s ${zeroad-data}/share/0ad/data/tools $out/share/0ad/data/tools
-
     # Copy libraries.
     install -Dm644 -t $out/lib/0ad        binaries/system/*.so