diff --git a/Makefile b/Makefile
index 07f64a2022b0ef3552e2bf843510a8aa082d2ce8..b6abf6916c058be0792b9bc42d0cde0eeb436ab4 100644
--- a/Makefile
+++ b/Makefile
@@ -2,9 +2,14 @@ JAR_NAME=rosetta_migration_plugin_dummy.jar
 JAR_OUTPATH=.
 
 build:
-	jar cf ${JAR_NAME} ${JAR_OUTPATH}
+	mkdir build/
+	cp -ra PLUGIN-INF/ build/
+	cp -ra plugin/ build/
+	cd build/; jar cf ${JAR_NAME} .; cd ..
+	mv build/${JAR_NAME} ${JAR_OUTPATH}/${JAR_NAME}
 
 clean:
+	rm -Rf build/
 	rm ${JAR_OUTPATH}/${JAR_NAME}
 
 help: