Bugfix spack ubuntu CPU build

.github/workflows/spack_cpu_build.yaml

@@ -7,14 +7,18 @@ env:
   # Our repo name contains upper case characters, so we can't use ${{ github.repository }}
   IMAGE_NAME: exago
   USERNAME: exago-bot
-  BASE_VERSION: ubuntu-22.04-fortran
+  BASE_VERSION: ubuntu-24.04-fortran
+  SPACK_CACHE: /opt/spack-cache
+  tempdir: /opt/spack-cache
+  TMP: /opt/spack-cache
+  TMPDIR: /opt/spack-cache
 
 # Until we remove the need to clone submodules to build, this should on be in PRs
 on: [pull_request]
 
 jobs:
   base_image_build:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     permissions:
       packages: write
       contents: read
@@ -32,7 +36,7 @@ jobs:
       - name: Create Dockerfile heredoc
         run: |
           cat << EOF > Dockerfile
-          FROM ubuntu:22.04
+          FROM ubuntu:24.04
           RUN apt-get update && \
               apt-get install -y --no-install-recommends \
                 software-properties-common \
@@ -55,7 +59,7 @@ jobs:
           registry: ${{ env.REGISTRY }}
           username: ${{ env.USERNAME }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      
+
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v5
@@ -73,27 +77,27 @@ jobs:
 
   exago_spack_builds:
     needs: base_image_build
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     permissions:
       packages: write
       contents: read
-    
+
     strategy:
       matrix:
         # Minimal Build(s) - GHCR mirror speeds these up a lot!
         spack_spec:
           # See #39 - ~python~mpi causes issues
-        # - exago@develop~mpi~ipopt~hiop~python~raja
+          # - exago@develop~mpi~ipopt~hiop~python~raja
           # See #44 - +mpi~python should fail if no python in system,
           #                       but the runner happens to have one...
           - exago@develop+mpi~ipopt+hiop~python~raja ^openmpi
           # See #18 - +hiop~mpi causes issues
-        # - exago@develop~mpi~ipopt+hiop~python+raja
+          # - exago@develop~mpi~ipopt+hiop~python+raja
           # See #16 - +python~mpi causes issues
-        # - exago@develop~mpi~ipopt+hiop+python~raja
+          # - exago@develop~mpi~ipopt+hiop+python~raja
           - exago@develop+mpi~ipopt+hiop+python~raja ^openmpi
           # See #40 - +hiop+raja~ipopt ^hiop~sparse is useful for edge cases
-          - exago@develop+mpi~ipopt+hiop~python+raja ^openmpi ^hiop+raja~sparse 
+          - exago@develop+mpi~ipopt+hiop~python+raja ^openmpi ^hiop+raja~sparse
 
     name: Build ExaGO with Spack
     steps:
@@ -103,10 +107,10 @@ jobs:
           # Once we move submodule deps into spack, we can do some more builds
           # Also need to change build script to use spack from base image
           submodules: true
-      
+
       - name: Setup Spack
         run: echo "$PWD/tpl/spack/bin" >> "$GITHUB_PATH"
-      
+
       - name: Create heredoc spack.yaml
         run: |
           cat << EOF > spack.yaml
@@ -116,31 +120,38 @@ jobs:
             concretizer:
               reuse: dependencies
             config:
+              concretizer: clingo
+              source_cache: $SPACK_CACHE/source_cache
+              misc_cache: $SPACK_CACHE/misc_cache
+              build_stage: $SPACK_CACHE/build_stage
               install_tree:
                 root: /opt/spack
                 padded_length: False
             mirrors:
               local-buildcache: oci://${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
               spack: https://binaries.spack.io/develop
+            packages:
+              all:
+                require: "%gcc"
 
       - name: Configure GHCR mirror
         run: spack -e . mirror set --oci-username ${{ env.USERNAME }} --oci-password "${{ secrets.GITHUB_TOKEN }}" local-buildcache
-      
+
       - name: Trust keys
         run: spack -e . buildcache keys --install --trust
-      
+
       - name: Find external packages
         run: spack -e . external find --all --exclude python
-      
+
       - name: Spack develop exago
         run: spack -e . develop --path=$(pwd) exago@develop
 
       - name: Concretize
         run: spack -e . concretize
-  
+
       - name: Install
-        run: spack -e . install --no-check-signature
-      
+        run: spack -e . install --no-check-signature --fail-fast
+
       # Push with force to override existing binaries...
       - name: Push to binaries to buildcache
         run: |