diff --git a/Jenkinsfile_train b/Jenkinsfile_train
index 11ac013..1e0af99 100644
--- a/Jenkinsfile_train
+++ b/Jenkinsfile_train
@@ -1,5 +1,11 @@
 pipeline {
 	agent any 
+    parameters {
+      buildSelector(
+          defaultSelector: lastSuccessful(),
+          description: 'Which build to use for copying artifacts',
+          name: 'BUILD_SELECTOR')
+    }
 	stages {
 		stage('checkout') {
 			steps {