Alternative approach to getting a stacktrace for a sample build failure

.travis.yml

@@ -3,4 +3,4 @@ language: java
 jdk:
   - oraclejdk7
 script:
-  - "./gradlew build buildSamples"
+  - "./gradlew build buildSamples --stacktrace"

buildSrc/src/main/groovy/org/springframework/restdocs/build/SampleBuildConfigurer.groovy

@@ -16,14 +16,12 @@
 
 package org.springframework.restdocs.build
 
-import org.gradle.StartParameter
 import org.gradle.api.GradleException
 import org.gradle.api.Project
 import org.gradle.api.Task
 import org.gradle.api.tasks.Exec
 import org.gradle.api.tasks.Copy
 import org.gradle.api.tasks.GradleBuild
-import org.gradle.logging.ShowStacktrace
 
 public class SampleBuildConfigurer {
 
@@ -87,12 +85,9 @@ public class SampleBuildConfigurer {
 		Task gradleBuild = project.tasks.create("${name}Gradle", GradleBuild)
 		gradleBuild.description = "Builds the ${name} sample with Gradle"
 		gradleBuild.group = "Build"
+		gradleBuild.dir = this.workingDir
+		gradleBuild.tasks = ['clean', 'build']
 		gradleBuild.dependsOn dependencies
-		StartParameter startParameter = new StartParameter()
-		startParameter.showStacktrace = ShowStacktrace.ALWAYS
-		startParameter.taskNames = ['clean', 'build']
-		startParameter.currentDir = new File(this.workingDir)
-		gradleBuild.startParameter = startParameter
 
 		gradleBuild.doFirst {
 			replaceVersion(new File(this.workingDir, 'build.gradle'),