diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 4abe3c0..02f6d49 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -10,11 +10,11 @@ on:
 jobs:
   cd:
     name: CD
-    uses: access-nri/build-cd/.github/workflows/cd.yml@v7
+    uses: access-nri/build-cd/.github/workflows/cd.yml@v8
     with:
       model: ${{ vars.NAME }}
-      spack-manifest-schema-version: 1-0-7
-      config-versions-schema-version: 3-0-0
+      spack-manifest-schema-version: 2-0-0
+      config-versions-schema-version: 4-0-0
       config-packages-schema-version: 1-0-0
     permissions:
       contents: write
diff --git a/.github/workflows/ci-command.yml b/.github/workflows/ci-command.yml
index b06012e..9d74435 100644
--- a/.github/workflows/ci-command.yml
+++ b/.github/workflows/ci-command.yml
@@ -8,12 +8,11 @@ jobs:
   redeploy:
     name: Redeploy
     if: startsWith(github.event.comment.body, '!redeploy') && github.event.issue.pull_request
-    uses: access-nri/build-cd/.github/workflows/ci.yml@v7
+    uses: access-nri/build-cd/.github/workflows/ci.yml@v8
     with:
       model: ${{ vars.NAME }}
-      pr: ${{ github.event.issue.number }}
-      spack-manifest-schema-version: 1-0-7
-      config-versions-schema-version: 3-0-0
+      spack-manifest-schema-version: 2-0-0
+      config-versions-schema-version: 4-0-0
       config-packages-schema-version: 1-0-0
     permissions:
       pull-requests: write
@@ -23,7 +22,7 @@ jobs:
   bump:
     name: Bump
     if: startsWith(github.event.comment.body, '!bump') && github.event.issue.pull_request
-    uses: access-nri/build-cd/.github/workflows/ci-comment.yml@v7
+    uses: access-nri/build-cd/.github/workflows/ci-comment.yml@v8
     with:
       model: ${{ vars.NAME }}
     permissions:
@@ -33,7 +32,7 @@ jobs:
   configs:
     name: Configs
     if: startsWith(github.event.comment.body, '!update-configs') && github.event.issue.pull_request
-    uses: access-nri/build-cd/.github/workflows/ci-command-configs.yml@v7
+    uses: access-nri/build-cd/.github/workflows/ci-command-configs.yml@v8
     with:
       model: ${{ vars.NAME }}
       auto-configs-pr-schema-version: 1-0-0
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c8c9195..7abfac3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,15 +19,12 @@ on:
 jobs:
   pr-ci:
     name: CI
-    if: >-
-      github.event.action != 'closed'
-    uses: access-nri/build-cd/.github/workflows/ci.yml@v7
+    if: github.event.action != 'closed'
+    uses: access-nri/build-cd/.github/workflows/ci.yml@v8
     with:
       model: ${{ vars.NAME }}
-      # root-sbd: if different from vars.NAME
-      pr: ${{ github.event.pull_request.number }}
-      spack-manifest-schema-version: 1-0-7
-      config-versions-schema-version: 3-0-0
+      spack-manifest-schema-version: 2-0-0
+      config-versions-schema-version: 4-0-0
       config-packages-schema-version: 1-0-0
     permissions:
       pull-requests: write
@@ -37,7 +34,5 @@ jobs:
   pr-closed:
     name: Closed
     if: github.event.action == 'closed'
-    uses: access-nri/build-cd/.github/workflows/ci-closed.yml@v7
-    with:
-      root-sbd: ${{ vars.NAME }}
+    uses: access-nri/build-cd/.github/workflows/ci-closed.yml@v8
     secrets: inherit
diff --git a/config/versions.json b/config/versions.json
index a6f4b3a..ef5f303 100644
--- a/config/versions.json
+++ b/config/versions.json
@@ -1,5 +1,5 @@
 {
-    "$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": "SOME_SPECIFIC_TAG"
+  "$schema": "https://raw.githubusercontent.com/ACCESS-NRI/schema/main/au.org.access-nri/model/deployment/config/versions/4-0-0.json",
+  "spack": "1.1",
+  "access-spack-packages": "2026.02.002"
 }
diff --git a/spack.yaml b/spack.yaml
index 96be036..5f04d1b 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -3,25 +3,38 @@
 # It describes a set of packages to be installed, along with
 # configuration settings.
 spack:
+  definitions:
+  # _name and _version are reserved definitions that inform build-cd deployments, and have no effect otherwise
+  - _name: # [DEPLOYMENT_NAME_HERE]
+  - _version: # [DEPLOYMENT_VERSION_HERE]
   specs:
   # The root Spack Bundle Recipe (SBR) for the model and overall version of
   # the deployment:
-  # TODO: Replace the MODEL and VERSION.
-  # - MODEL@git.VERSION
+  # TODO: Replace the MODEL.
+  # - MODEL
   packages:
     # Specification of dependency versions and variants. CI/CD requires that
     # the first element of the require is only a version:
     # TODO: Specify versions and variants of dependencies as required.
     # openmpi:
     #   require:
-    #     - '@4.1.5'
+    #   - '@4.1.5'
 
+    # Compilers
+    # c:
+    #  require:
+    #  - intel-oneapi-compilers-classic@19.0.5.281
+    # cxx:
+    #  require:
+    #  - intel-oneapi-compilers-classic@19.0.5.281
+    # fortran:
+    #   require:
+    #   - intel-oneapi-compilers-classic@19.0.5.281
     # Specifications that apply to all packages
     all:
-    # TODO: Specify compiler/targets for all packages
+    # TODO: Specify targets for all packages
     # require:
-    #   - '%intel@19.0.5.281'
-    #   - 'target=x86_64'
+    # - 'target=x86_64_v3'
   view: true
   concretizer:
     unify: true