javascript not found

[h3xcat]

I'm running Java 1.8.

[18:59:31 INFO]: [EasyScript] Enabling EasyScript v2.0-jetty 
[18:59:31 INFO]: [EasyScript] Creating classloader for language runtime: [file:/home/minecraft/plugins/EasyScript/lib/groovy-all-2.3.7.jar, file:/home/minecraft/plugins/EasyScript/lib/jruby-complete-1.7.16.jar, file:/home/minecraft/plugins/EasyScript/lib/jython-standalone-2.5.3.jar] 
[18:59:31 ERROR]: [EasyScript] Script engine named: javascript not found, disabling plugin. 
[18:59:31 INFO]: [EasyScript] Disabling EasyScript v2.0-jetty

[jwulf]

Your Java installation is missing the Nashorn jar.

[h3xcat]

I thought it was included by default with java 1.8. Where can I find it?