Unable to build selenium script in jenkins - jenkins

Question

Unable to build Selenium Script in Jenkins.
Generating error related to Browser driver.
Working Code in Eclipse with Maven
package test;
import org.testng.annotations.Test;
import org.testng.annotations.BeforeTest;
import java.net.MalformedURLException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.remote.DesiredCapabilities;
import org.testng.annotations.AfterTest;
public class NewTest {
private WebDriver driver;
#Test
public void testEasy() throws InterruptedException {
System.out.println("Testing");
driver.get("http://www.google.com/");
Thread.sleep(5000);
String title = driver.getTitle();
}
#SuppressWarnings("deprecation")
#BeforeTest
public void beforeTest() throws MalformedURLException {
System.out.println("#BeforeTest");
//System.setProperty("webdriver.gecko.driver", "F:\\Selenium\\Selenium Library\\drivers\\geckodriver.exe");
//Now you can Initialize marionette driver to launch firefox
DesiredCapabilities capabilities = DesiredCapabilities.firefox();
capabilities.setCapability("marionette", true);
/*FirefoxOptions options = new FirefoxOptions()
.addPreference("browser.startup.page", 1)
.addPreference("browser.startup.homepage", "http://demo.guru99.com/test/guru99home/");
driver = new FirefoxDriver(options);
*/
driver = new FirefoxDriver();
}
#AfterTest
public void afterTest() {
System.out.println("##AfterTest");
driver.quit();
}
}
After trying to run POM.xml build in Jenkins. It's result failed because of Unable to execute gecko driver.
enter image description here
Failed
test.NewTest.beforeTest (from TestSuite)
Failing for the past 26 builds (Since Unstable#11 )
Took 1.2 sec.
add description
Error Message
The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases
Stacktrace
java.lang.IllegalStateException: The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases
at test.NewTest.beforeTest(NewTest.java:39)
Standard Output
#BeforeTest
Standard Error
Apr 20, 2018 2:12:36 PM org.openqa.selenium.remote.DesiredCapabilities firefox
INFO: Using `new FirefoxOptions()` is preferred to `DesiredCapabilities.firefox()`
Any one have idea about how to resolved this issue please provide me solution for that