Uses $env to resolve variables
diff --git a/Jenkinsfile b/Jenkinsfile
index 8ef68fa..5332602 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -1,6 +1,6 @@
 #!groovy
 
-dockerArgs = '-v $WORKSPACE/.m2:/root/.m2 -e MAVEN_OPTS="-Xmx1024m" -e USER=$USER'
+dockerArgs = "-v ${env.WORKSPACE}/.m2:/root/.m2 -e MAVEN_OPTS=\"-Xmx1024m\" -e USER=${env.USER}"
 
 pipeline {
   agent none