diff --git a/.github/build-ci/manifests/um7-acces-esm1p6.spack.yaml.j2 b/.github/build-ci/manifests/um7-acces-esm1p6.spack.yaml.j2
index e290f3f02..289733ebf 100644
--- a/.github/build-ci/manifests/um7-acces-esm1p6.spack.yaml.j2
+++ b/.github/build-ci/manifests/um7-acces-esm1p6.spack.yaml.j2
@@ -11,7 +11,7 @@ spack:
         - '@git.access-esm1.5-2025.03.001=access-esm1.5'
     cable:
       require:
-      - '@{{ ref }}'
+      - '@git.{{ ref }}'
       - library=access-esm1.6
     openmpi:
       require: