diff --git a/Jenkinsfile b/Jenkinsfile
index afa4b23..3179700 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -15,9 +15,9 @@
 **/
 exceriseSets = [
 //    'ex101' : [3, 2],
-    'ex201' : [1, 1, 1, 1, 1],
+    '201' : [1, 1, 1, 1, 1],
 //    'ex301' : [2, 2, 5, 6], manually built with a single image
-    'ex401' : [6, 9, 7, 1]
+    '401' : [6, 9, 7, 1]
 ]
 
 pipeline {
@@ -98,14 +98,14 @@ pipeline {
             steps {
                 script {
                     docker.withRegistry('https://registry.hub.docker.com/',   "dockerhub-${maintainer}") {
-                        def baseImg = docker.build("${maintainer}/${imagename}:101.1.1", "--no-cache --pull ex101/ex101.1.1")
-                        baseImg.push("ex101.1.1-${tag}")
+                        def baseImg = docker.build("${maintainer}/${imagename}:101.1.1", "--no-cache --pull 101/ex101.1.1")
+                        baseImg.push("101.1.1-${tag}")
 
-                        baseImg = docker.build("${maintainer}/${imagename}:211.1.1", "--no-cache --pull ex211/ex211.1.1")
-                        baseImg.push("ex211.1.1-${tag}")
+                        baseImg = docker.build("${maintainer}/${imagename}:211.1.1", "--no-cache --pull 211/ex211.1.1")
+                        baseImg.push("211.1.1-${tag}")
 
-                        baseImg = docker.build("${maintainer}/${imagename}:301.4.1", "--no-cache --pull ex301/ex301.4.1")
-                        baseImg.push("ex301.4.1-${tag}")
+                        baseImg = docker.build("${maintainer}/${imagename}:301.4.1", "--no-cache --pull 301/ex301.4.1")
+                        baseImg.push("301.4.1-${tag}")
                     }
                 }
             }