diff --git a/Jenkinsfile b/Jenkinsfile
index 7dea04d..48121c9 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -49,7 +49,7 @@ pipeline {
       steps {
         catchError(buildResult: 'FAILURE', stageResult: 'FAILURE') {
           sh 'mkdir -p url-shortener'
-          sh 'echo $SHELL'
+          sh 'env | grep -i shell'
           sh 'shopt -s extglob'
           sh 'cp -R !(url-shortener) url-shortener/'
           sh 'rm -rf url-shortener/features'