diff --git a/spack.yaml b/spack.yaml
index 5ef1a9b..0b47ba4 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -30,6 +30,7 @@ spack:
     access-mom6:
       require:
       - '@2026.01.001'
+      - +mom6_solo
       - 'fflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'
       - 'cflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'
       - 'cxxflags="-march=sapphirerapids -mtune=sapphirerapids -unroll"'