diff --git a/Makefile b/Makefile
index 8ec64322..791c1d16 100644
--- a/Makefile
+++ b/Makefile
@@ -564,7 +564,8 @@ ifeq ($(EXTERNAL_DATA),1)
   CC_CHECK += -DEXTERNAL_DATA -DFS_BASEDIR="\"$(BASEDIR)\""
   CFLAGS += -DEXTERNAL_DATA -DFS_BASEDIR="\"$(BASEDIR)\""
   # tell skyconv to write names instead of actual texture data and save the split tiles so we can use them later
-  SKYCONV_ARGS := --store-names --write-tiles "$(BUILD_DIR)/textures/skybox_tiles"
+  SKYTILE_DIR := $(BUILD_DIR)/textures/skybox_tiles
+  SKYCONV_ARGS := --store-names --write-tiles "$(SKYTILE_DIR)"
 endif
 
 ASFLAGS := -I include -I $(BUILD_DIR) $(VERSION_ASFLAGS)
@@ -641,6 +642,7 @@ $(BASEPACK_LST): $(EXE)
 	@echo "$(BUILD_DIR)/sound/sequences.bin sound/sequences.bin" >> $(BASEPACK_LST)
 	@echo "$(BUILD_DIR)/sound/sound_data.ctl sound/sound_data.ctl" >> $(BASEPACK_LST)
 	@echo "$(BUILD_DIR)/sound/sound_data.tbl sound/sound_data.tbl" >> $(BASEPACK_LST)
+	@$(foreach f, $(wildcard $(SKYTILE_DIR)/*), echo $(f) gfx/$(f:$(BUILD_DIR)/%=%) >> $(BASEPACK_LST);)
 	@find actors -name \*.png -exec echo "{} gfx/{}" >> $(BASEPACK_LST) \;
 	@find levels -name \*.png -exec echo "{} gfx/{}" >> $(BASEPACK_LST) \;
 	@find textures -name \*.png -exec echo "{} gfx/{}" >> $(BASEPACK_LST) \;