diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 450014a..b444d0b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,7 +42,9 @@ jobs:
             cd ${KYNEMA_MANAGER}/environments/e4s-build && \
             ln -s ${GITHUB_WORKSPACE} kynema-driver && \
             spack develop --no-modify-concrete-specs --no-clone kynema-driver@main && \
-            spack concretize -f && \
+            spack rm kynema && \
+            spack add kynema-driver@main~kynema-fmb~kynema_sgf_gpu~kynema_ugf_gpu~tests && \
+            spack concretize --reuse -f && \
             spack install && \
             spack cd -b kynema-driver && \
             spack build-env kynema-driver ctest -j $(nproc) -LE no-ci --output-on-failure \