Errr... It's a bit big after years of adding to that log file. I'll back it run it again. Update: So what I did was just copied everything except BuildTools.jar to a backup folder and ran again... and what do ya know... spigot-api-1.11.2-R0.1-SNAPSHOT-shaded.jar JAR file. So I think it may have been just years of using the same file tree with new BuildTools.jar that did something.