diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index fbb5289..2da0e91 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -29,6 +29,9 @@ jobs:
     - name: Find compilers
       run: spack -e . compiler find
 
+    - name: Show packages config
+      run: spack -e . config get packages
+
     - name: Concretize (fresh)
       run: spack -e . -v concretize --fresh
       if: ${{ github.event.inputs.name == 'true' }}
diff --git a/spack.yaml b/spack.yaml
index 5de1fb4..1f44cd8 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -30,11 +30,11 @@ spack:
     all:
       require: target=x86_64_v3
     c:
-      prefer: [gcc@9]
+      prefer: [gcc@10]
     cxx:
-      prefer: [gcc@9]
+      prefer: [gcc@10]
     fortran:
-      prefer: [gcc@9]
+      prefer: [gcc@10]
   mirrors:
     github-actions-buildcache:
       url: oci://ghcr.io/spack/github-actions-buildcache