gradle build produces .jar file that Burp cannot load

[mcgyver5]

running gradle build results in a param-miner.jar that gives the following error when added to Burp:

Failed to import the Apache Commons Lang library. You can get it from http://commons.apache.org/proper/commons-lang/

running gradle fatJar results in a param-miner-all.jar that works

version = Burp Suite Community Edition v2.1.04

[albinowax]

Thanks, I've updated the docs to reflect this.