What steps will reproduce the problem?

Download my custom Spigot fork called Volcano for 1.8.8.

Expected output

Should detect correct NMS

What do you see instead?

java.lang.ClassNotFoundException: de.dustplanet.silkspawners.compat.null.NMSHandler

Log file of the issue/error

https://hasteb.in/ohulexos.gradle

/version output?

16.04 22:42:21 [Server] INFO This server is running CraftBukkit version git-Volcano-"769949b" (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT)

SilkSpawners version

5.0.2

Please provide any additional information below.

Checklist

• I am aware that issues caused by /reload are ignored
• If there is a (potential) plugin conflict, I've identified the conflicting plugin
• I have added a valid /version output
• I have added a valid SilkSpawners version
• I have attached necessary information like a screenshot, my list of plugins, config or permissions file(s)

UPDATE:
Works on build 503 on Jenkins, but ShopGUI+ doesn't work anymore.