Gepetto

Add this to you jar block in build.gradle. Depending on what jars you embed, there might be some that need certain entries in their META-INF\MANIFEST.MF; add those entries into your mod's META-INF\MANIFEST.MF. Also you might have to instruct shadow to remap the embedded jar's classes into the package of your mod. from configurations.embed.collect { it.isDirectory() ? it : zipTree(it).matching { exclude 'META-INF', 'META-INF/**' } }