diff --git a/config/versions.json b/config/versions.json
index 46074bf..1f5496c 100644
--- a/config/versions.json
+++ b/config/versions.json
@@ -1,5 +1,5 @@
 {
     "$schema": "https://github.com/ACCESS-NRI/schema/blob/main/au.org.access-nri/model/deployment/config/versions/3-0-0.json",
     "spack": "0.22",
-    "spack-packages": "2025.09.004"
+    "spack-packages": "2817e9e41a6142cb617b216e53c7f3fef5a8da52"
 }
diff --git a/spack.yaml b/spack.yaml
index 1a55bb2..6877373 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -5,11 +5,13 @@
 spack:
   # add package specs to the `specs` list
   specs:
-    - access-om2@git.2025.09.000=latest
+    - access-om2@git.2025.12.000 ^cice5 nxglob=360 nyglob=300 blckx=15 blcky=300 mxblcks=1
+    - access-om2 ^cice5 nxglob=1440 nyglob=1080 blckx=30 blcky=27 mxblcks=4
+    - access-om2 ^cice5 nxglob=3600 nyglob=2700 blckx=18 blcky=15 mxblcks=22
   packages:
     cice5:
       require:
-        - '@git.2025.03.001=access-om2'
+        - '@git.4048ff2b836a04a6ea00fcbffd17335829393e5b=stable model=access-om2 io_type=PIO'
     mom5:
       require:
         - '@git.2025.08.000=access-om2'
@@ -27,7 +29,7 @@ spack:
         - '@4.6.1'
     parallelio:
       require:
-        - '@2.6.2'
+        - '@git.06e79373ae7f344833ba70a5958b53cd7a46adef=2.6.2'
     openmpi:
       require:
         - '@4.1.5'
@@ -45,6 +47,11 @@ spack:
       require:
         - '%intel@19.0.5.281'
         - 'target=x86_64'
-  view: true
+  view: false
   concretizer:
-    unify: true
+    unify: when_possible
+  modules:
+    default:
+      tcl:
+        projections:
+          access-om2: '{name}/2025.12.000-{^cice5.variants.nxglob.value}x{^cice5.variants.nyglob.value}'