diff --git a/.gitlab-ci-build.yml.in b/.gitlab-ci-build.yml.in
index 4b98190..4a4548f 100644
--- a/.gitlab-ci-build.yml.in
+++ b/.gitlab-ci-build.yml.in
@@ -74,7 +74,7 @@ hyperv-iso.amd64:
   extends: .build
   variables:
     <<: *variables
-    only: '-only="hyperv-iso.amd64"'
+    only: '-only=hyperv-iso.amd64'
     tag: hyperv
   parallel:
     matrix: []