}

        then:
        fetchedBeforeBuildFinished(project)
    }

    void setup() {
        buildFile << """
            gradle.buildFinished {
                buildDir = "someOtherDir"
            }
        """
    }

    private boolean fetchedBeforeBuildFinished(GradleProject project) {
        project.buildDirectory == file("build")
    }

            }
            someOtherDir {
                file 'preserved.txt'
                file 'not-preserved.txt'
            }
        }

        buildScript '''
            task sync(type: Sync) {
                from 'source'
                into 'dest'
                preserve {
                    exclude 'someOtherDir/not-preserved.txt'

        def projectC = project(project, "c")
        Task dependency = task("dependency", project: projectC, type: AsyncWithDestroysFile)
        _ * dependency.destroysFile >> file("someOtherDir")
        def projectB = project(project, "b")
        Task destroyer = task("destroyer", project: projectB, type: AsyncWithDestroysFile, dependsOn: [dependency])