diff --git a/prism/Makefile b/prism/Makefile
index 01bf11e2..919255c2 100644
--- a/prism/Makefile
+++ b/prism/Makefile
@@ -573,8 +573,8 @@ clean: checks
 	  || exit 1; \
 	done; \
 	find $(CLASSES_DIR) -name '*.class' -exec rm {} \; ; \
-	rm -f lib/*jnilib; \
-	rm -f lib/prism.jar; \
+	rm -f $(LIB_DIR)/*jnilib; \
+	rm -f $(LIB_DIR)/prism.jar; \
 	rm -f $(LIB_DIR)/prism-sources.jar; \
 	rm -f $(BIN_PRISM) $(BIN_XPRISM) $(BIN_PRISM_BAT) $(BIN_XPRISM_BAT) )