diff --git a/spack.yaml b/spack.yaml
index 9a4c3c1..44f505b 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -48,7 +48,7 @@ spack:
         lmod: $spack/../release/lmod
       tcl:
         # Remove hash_length once spack-config's modules.yaml is updated.
-        hash_length: 7
+        # hash_length: 0
         include:
           # The model components are required below:
           - access-om2
@@ -65,5 +65,5 @@ spack:
             set:
               'SPACK_{name}_ROOT': '{prefix}'
         projections:
-          all: '{name}/{version}'
+          all: '{name}/{version}-{hash}'
           access-om2: '{name}/2024.08.0'