diff --git a/pregelix-example/pom.xml b/pregelix-example/pom.xml
index 01c0d77..e643331 100644
--- a/pregelix-example/pom.xml
+++ b/pregelix-example/pom.xml
@@ -19,6 +19,7 @@
 				<configuration>
 					<source>1.7</source>
 					<target>1.7</target>
+					<fork>true</fork>
 				</configuration>
 			</plugin>
 			<plugin>
@@ -76,6 +77,7 @@
 				</configuration>
 			</plugin>
 			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-clean-plugin</artifactId>
 				<version>2.5</version>
 				<configuration>