diff --git a/Jenkinsfile b/Jenkinsfile
index e0e7a800..b79a0eaa 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -52,7 +52,9 @@ pipeline {
             }
             steps {
                 unstash 'debuildOutput'
-                debFile = sh(script: 'ls output/*.deb', returnStdout: true).trim()
+                script {
+                    debFile = sh(script: 'ls output/*.deb', returnStdout: true).trim()
+                }
 
                 withCredentials([sshUserPrivateKey(
                     credentialsId: 'jenkins-agent',