diff --git a/bob/devtools/data/gitlab-ci/single-package.yaml b/bob/devtools/data/gitlab-ci/single-package.yaml
index 10aa2b547bc39355c5ed7039c1179d1556b931d8..6375dda2d9d82d2cecd91aace793af4a75d853cb 100644
--- a/bob/devtools/data/gitlab-ci/single-package.yaml
+++ b/bob/devtools/data/gitlab-ci/single-package.yaml
@@ -105,6 +105,7 @@ build_macos_arm_39:
   extends: .build_macos_arm_template
   variables:
     PYTHON_VERSION: "3.9"
+  allow_failure: true
   cache:
     key: "build-py39"