diff --git a/vars/cpkg.groovy b/vars/cpkg.groovy
index def66fe..00c6e80 100644
--- a/vars/cpkg.groovy
+++ b/vars/cpkg.groovy
@@ -72,6 +72,8 @@ def call(Map params = [:]) {
             versionNumber = "0.0.0-${versionNumber}"
         }
 
+        versionNumber = "${versionNumber}-b${env.BUILD_NUMBER}"
+
         println("New version number will be '${versionNumber}'")
         result['newVersionNumber'] = versionNumber