Error log:

FAILURE: Build failed with an exception.

• Where:
  Build file '/home/[ITS A SECRET]/git/Equivalent-Exchange-3/build.gradle' line: 19

• What went wrong:
  A problem occurred evaluating root project 'Equivalent-Exchange-3'.

  Could not generate a proxy class for class >net.minecraftforge.gradle.user.patch.UserPatchExtension.

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log >output.

BUILD FAILED

Total time: 3 mins 49.279 secs

and gradle version:

Gradle 1.4

Gradle build time: 9. syyskuuta 2013 20.44.25 UTC
Groovy: 1.8.6
Ant: Apache Ant(TM) version 1.9.3 compiled on April 8 2014
Ivy: non official version
JVM: 1.7.0_80 (Oracle Corporation 24.80-b11)
OS: Linux 3.13.0-52-generic i386

i upgrade it

i think its old gradle version