def clean = rootBuild.task('clean').dependsOn(cleanFoo).dependsOn(cleanBar)
        def cleanFooLocal = foo.task('cleanFooLocalState').destroys('build/foo-local')
        def cleanLocal = rootBuild.task('cleanLocal').dependsOn(cleanFooLocal)
        def generateFoo = foo.task('generateFoo').outputs('build/foo').localState('build/foo-local')
        def generateBar = bar.task('generateBar').outputs('build/bar')