}
    }

    private String execInCheckoutDir(Action<ExecSpec> execSpecConfig) {
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        ExecResult exec = execOperations.exec(execSpec -> {
            execSpec.setStandardOutput(os);
            execSpec.workingDir(gitExtension.getCheckoutDir().get());
            execSpecConfig.execute(execSpec);
        });
        exec.assertNormalExitValue();

        LoggedExec.exec(getExecOperations(), execSpec -> {
            execSpec.setExecutable("vagrant");
            File vagrantfile = extension.getVagrantfile();
            execSpec.setEnvironment(System.getenv()); // pass through env
            execSpec.environment("VAGRANT_CWD", vagrantfile.getParentFile().toString());
            execSpec.environment("VAGRANT_VAGRANTFILE", vagrantfile.getName());