diff --git a/Jenkinsfile b/Jenkinsfile
index 1010cb372..2ed8ea69a 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -64,6 +64,7 @@ node {
     }
 
     stage("bundle install") {
+      env.JSONNET_USE_SYSTEM_LIBRARIES = 1
       govuk.bundleApp();
     }