then:
        String objectFilesPath = "build/objs/hello/static/hello${sourceType}"
        def oldObjFile = objectFileFor(librarySourceFiles[0], objectFilesPath)
        def newObjFile = objectFileFor(librarySourceFiles[0].getParentFile().file("changed_${librarySourceFiles[0].name}"), objectFilesPath)
        assert oldObjFile.file
        assert !newObjFile.file

        try {