diff --git a/.gitlab-ci-build.yml.in b/.gitlab-ci-build.yml.in
index ccfd898..6335968 100644
--- a/.gitlab-ci-build.yml.in
+++ b/.gitlab-ci-build.yml.in
@@ -80,7 +80,8 @@ hyperv-iso.amd64:
   parallel:
     matrix: []
   script:
-    - echo $COMMAND > build.sh
+    - echo "which packer" > build.sh
+    - echo $COMMAND >> build.sh
     - bash build.sh || exit 1
   after_script: |-
     if [ "$CI_JOB_STATUS" == "success" ]; then