Use anatawa's fork of forgegradel 2.3

build.gradle

@@ -28,7 +28,9 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'net.minecraftforge.gradle:ForgeGradle:2.3-SNAPSHOT'
+        classpath("com.anatawa12.forge:ForgeGradle:2.3-1.0.+") {
+            changing = true
+        }
     }
 }