try removing `--no-check-signature`

.gitlab-ci.yml

@@ -186,7 +186,7 @@ build-spack-env-on-runner:
     - spack repo add .
     - spack env create $SPACK_DEV_ENV spack.yaml
     - spack env activate $SPACK_DEV_ENV
-    - spack install -y -j2 --fresh --no-check-signature --test root
+    - spack install -y -j2 --fresh --test root
   after_script:
     - mkdir spack_logs
     - |