diff --git a/Makefile.in b/Makefile.in
index 6efc3e94..52e1e82f 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -430,7 +430,7 @@ $(eval $(call rules-autoconf,wine,64))
 $(eval $(call rules-wine-requests,wine))
 
 $(OBJ)/.wine-post-source:
-	cd $(WINE_SRC) && dlls/winevulkan/make_vulkan -x vk.xml -X video.xml
+	cd $(WINE_SRC) && XDG_CACHE_HOME=$(OBJ) dlls/winevulkan/make_vulkan -x vk.xml -X video.xml
 	-cd $(WINE_SRC) && tools/make_specfiles
 	touch $@