Why is my Gradle task always running?

If I run ./gradlew clean or ./gradlew tasks --all, it is always running my compile task(which I overwrote in the gradle build script like the below)

task eclipse(overwrite: true) {
    exec { commandLine = ["./play1.3.x/play", "eclipsify"] }
}

task compileJava(overwrite: true) {
    exec { commandLine = ["./play1.3.x/play", "precompile"] }
}

task deleteDirs(type: Delete) {
    delete 'precompiled', 'tmp'
}

//NOW, assemble needs to zip up directories precompiled, public, lib, and conf
clean.dependsOn('deleteDirs')

I don't get why the eclipse one is not running every time and seems to work just fine while overridding the compile one is not working.