updated example a little

fml/install/build.gradle

@@ -11,7 +11,7 @@ buildscript {
         }
     }
     dependencies {
-        classpath 'net.minecraftforge.gradle:ForgeGradle:1.1-SNAPSHOT'
+        classpath 'net.minecraftforge.gradle:ForgeGradle:1.2-SNAPSHOT'
     }
 }
 
@@ -25,8 +25,13 @@ minecraft {
     version = "${version}"
     assetDir = "eclipse/assets"
 }
+
 processResources
 {
+    // this will ensure that this task is redone when the versions change.
+    inputs.property "version", project.version
+    inputs.property "mcversion", project.minecraft.version
+
     // replace stuff in mcmod.info, nothing else
     from(sourceSets.main.resources.srcDirs) {
         include 'mcmod.info'