diff --git a/configs/templates/skylab-dev/spack.yaml b/configs/templates/skylab-dev/spack.yaml
index 91735cf45..65a22bf5f 100644
--- a/configs/templates/skylab-dev/spack.yaml
+++ b/configs/templates/skylab-dev/spack.yaml
@@ -16,6 +16,10 @@ spack:
       - jedi-um-env@skylab-dev
       - soca-env@skylab-dev
 
+      # Additional crtm tags
+      - crtm@v2.4-jedi.2
+      - crtm@v2.4.1-jedi
+
   specs:
     - matrix:
       - [$packages]
diff --git a/configs/templates/unified-dev/spack.yaml b/configs/templates/unified-dev/spack.yaml
index d527603fb..bedb4de90 100644
--- a/configs/templates/unified-dev/spack.yaml
+++ b/configs/templates/unified-dev/spack.yaml
@@ -25,15 +25,13 @@ spack:
       #- upp-env@unified-dev
       #- ww3-env@unified-dev
 
-      # Additional esmf/mapl tags - don't activate by default, this
-      # can lead to duplicate packages (e.g. in Ubuntu CI tests)
+      # Additional esmf/mapl tags
       #- esmf@8.4.2~debug+external-parallelio
       #- mapl@2.35.2~debug ^esmf@8.4.2~debug+external-parallelio
 
-      # Additional crtm tags - don't activate by default, this
-      # can lead to duplicate packages (e.g. in Ubuntu CI tests)
-      #- crtm@v2.4-jedi.2
-      #- crtm@v3.0.0-rc.1
+      # Additional crtm tags
+      - crtm@v2.4-jedi.2
+      - crtm@v2.4.1-jedi
 
   specs:
     - matrix: