diff --git a/.gitlab/generate.yml b/.gitlab/generate.yml
index 9f31a89..6b42cbd 100644
--- a/.gitlab/generate.yml
+++ b/.gitlab/generate.yml
@@ -27,6 +27,7 @@
   script:
     - . ${SPACK_PATH}/share/spack/setup-env.sh
     - spack env activate spack-environments/${ENV_NAME}
+    - spack mirror rm spack-public
     - spack ${SPACK_DEBUG} ci generate
         --artifacts-root "${CI_PROJECT_DIR}/jobs_scratch_dir"
         --output-file "${CI_PROJECT_DIR}/jobs_scratch_dir/pipeline.yml"