diff --git a/pkgs/by-name/et/etlegacy-unwrapped/package.nix b/pkgs/by-name/et/etlegacy-unwrapped/package.nix
index a080a17226f0..b675fb076c2e 100644
--- a/pkgs/by-name/et/etlegacy-unwrapped/package.nix
+++ b/pkgs/by-name/et/etlegacy-unwrapped/package.nix
@@ -90,10 +90,19 @@ stdenv.mkDerivation {
 
   cmakeFlags = [
     "-DCROSS_COMPILE32=0"
+    "-DCMAKE_BUILD_TYPE=Release"
     "-DBUILD_SERVER=1"
     "-DBUILD_CLIENT=1"
+    "-DBUNDLED_ZLIB=0"
+    "-DBUNDLED_CJSON=0"
     "-DBUNDLED_JPEG=0"
     "-DBUNDLED_LIBS=0"
+    "-DBUNDLED_FREETYPE=0"
+    "-DBUNDLED_OGG_VORBIS=0"
+    "-DBUNDLED_OPENAL=0"
+    "-DBUNDLED_PNG=0"
+    "-DBUNDLED_THEORA=0"
+    "-DBUNDLED_MINIZIP=0"
     "-DINSTALL_EXTRA=0"
     "-DINSTALL_OMNIBOT=0"
     "-DINSTALL_GEOIP=0"