diff --git a/Jenkinsfile b/Jenkinsfile
index 703e51a..da19523 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -15,19 +15,16 @@ pipeline {
         }
 
         stage('Download, Process, and Split Dataset') {
-             agent {
-                    dockerfile {
-                        args "-e KAGGLE_USERNAME=${env.KAGGLE_USERNAME} -e KAGGLE_KEY=${env.KAGGLE_KEY}"
-                    }
-                }
+            agent {
+                dockerfile true
+            }
             steps {
                 withEnv([
                     "KAGGLE_USERNAME=${env.KAGGLE_USERNAME}",
                     "KAGGLE_KEY=${env.KAGGLE_KEY}"
                 ]) {
-//                     sh "echo 'The parameter value is: $KAGGLE_USERNAME'"
-//                     sh 'export KAGGLE_USERNAME=${env.KAGGLE_USERNAME}"'
-//                     sh 'export KAGGLE_KEY=${env.KAGGLE_KEY}"'
+                    sh "echo === VARIABLE SUBSTITUTION ==="
+                    sh "echo ${params.KAGGLE_USERNAME}"'
                     sh "python3 IUM_02.py"
                 }
             }