https://bugs.openjdk.java.net/browse/JDK-8231902 http://cr.openjdk.java.net/~dlong/8231902/webrev/
A recent upstream Graal change causes the META-INF/providers directory to contain only a single file, causing the $(GREP) command to not prepend the filename to the output. The simple fix is to create an empty file in the directory.
dl
