diff --git a/build/build-lua b/build/build-lua
index 9eeec05e3..d90caf02c 100755
--- a/build/build-lua
+++ b/build/build-lua
@@ -84,7 +84,7 @@ build_test_rock_lua() {
 
 	cd "$luasrc_dir"
 
-	luarocks make iced_x86-*.rockspec --local --lua-version $lua_maj.$lua_min
+	ICED_LUA_EXTRA_FEATURES="extra_checks" luarocks make iced_x86-*.rockspec --local --lua-version $lua_maj.$lua_min
 
 	eval $(luarocks path --lua-version $lua_maj.$lua_min)
 	busted_filename=/tmp/tmp-busted-runner
diff --git a/src/rust/iced-x86-lua/luarocks-build-unix.sh b/src/rust/iced-x86-lua/luarocks-build-unix.sh
index eafc59888..891f12257 100644
--- a/src/rust/iced-x86-lua/luarocks-build-unix.sh
+++ b/src/rust/iced-x86-lua/luarocks-build-unix.sh
@@ -29,6 +29,8 @@ build() {
 		echo "Unsupported Lua version: $lua_ver"
 		exit 1
 	fi
+	# Env var set by build-lua
+	lua_feat="$lua_feat $ICED_LUA_EXTRA_FEATURES"
 	cargo build --release -v --features "$lua_feat"
 }