Chromium with agouti pkg on AWS Lambda doesn't work (couldn't take screenshot)

Question

I'm trying to use headless-chromium on AWS Lambda with Golang and sclevine/agouti. I confirmed that chromedriver is executed on Lambda using exec.Command.

Error occurred when taking screenshot, but, I'm not sure headless-chromium is started properly. No error occurred when executing driver.Start() and driver.NewPage. Start message like ChromeDriver 2.43.600233, onlt local connection is allowed was not shown.

Code and outputs are like below.

func main() {
    lambda.Start(handler)
}

func handler(request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
    os.Setenv("PATH", os.Getenv("PATH") + ":/var/task")

    out1, err := exec.Command("/var/task/chromedriver", "-v").Output()
    if err != nil {
        log.Fatal(err)
    }
    log.Printf("exec chromedriver %s\n", string(out1))
    // 2018/11/08 13:12:05 exec chromedriver ChromeDriver 2.43.600233 (523efee95e3d68b8719b3a1c83051aa63aa6b10d)

    opts := []agouti.Option{
        agouti.ChromeOptions(
            "args", []string{
                "headless",
                "no-default-browser-check",
                "verbose",
                "no-sandbox",
                "no-first-run",
                "disable-default-apps",
                "disable-popup-blocking",
                "disable-translate",
                "disable-background-timer-throttling",
                "disable-renderer-backgrounding",
                "disable-device-discovery-notifications",
            },
        ),
        agouti.Desired(
            agouti.Capabilities{
                "loggingPrefs": map[string]string{
                    "browser": "INFO",
                },
            },
        ),
    }
    opts = append(opts,
        agouti.ChromeOptions(
            "binary", "/var/task/headless-chromium",
        ))
    driver := agouti.NewWebDriver("http://{{.Address}}", []string{"/var/task/chromedriver", "--port={{.Port}}"}, opts...)
    if err := driver.Start(); err != nil {
        log.Fatalf("failed to start driver:%v", err)
    }
    p, err := driver.NewPage()
    if err != nil {
        log.Fatalf("failed to open page:%v", err)
    }
    if err := page.Navigate("https://www.google.com/"); err != nil {
        log.Fatalf("failed to navigate:%v", err)
    }
    if err := page.Screenshot("/tmp/top.jpg"); err != nil {
        log.Fatalf("failed to take ss:%v", err)
        // 2018/11/08 13:12:07 failed to take ss:failed to retrieve                 
        // screenshot: unexpected response:
        // {
        //    "sessionId": "30c4fc0e74ce6c865ced6c8443e873bc",
        //    "status": 6,
        //    "value": {
        //        "message": "invalid session id\n  (Driver info: chromedriver=2.43.600233 (523efee95e3d68b8719b3a1c83051aa63aa6b10d),platform=Linux 4.14.72-68.55.amzn1.x86_64 x86_64)"
        //    }
        //}
    }
}

I got binaries of headless-shell and chromedriver like below.

curl -SL https://chromedriver.storage.googleapis.com/2.43/chromedriver_linux64.zip > chromedriver.zip
unzip chromedriver.zip -d artifact/
rm chromedriver.zip
curl -SL https://github.com/adieuadieu/serverless-chrome/releases/download/v1.0.0-54/stable-headless-chromium-amazonlinux-2017-03.zip > headless-chromium.zip
unzip headless-chromium.zip -d artifact/
rm headless-chromium.zip

I deployed artifacts using SAM and artifacts were deployed under var/tasks/ on Lambda.

Please help me...