diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d49b6bb1c7e7090c27aa7101e6ed35748d049360..804521c3be22fee822806c43bf2e6fcb06a5aba9 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -115,7 +115,7 @@ spack:concretize:
   script:
     - source ci/stack_env.sh
     - ${STACK_LOCATION}/spack/bin/spack -e ${environment} config blame | tee config-${environment}-${stack}.log
-    - ${STACK_LOCATION}/spack/bin/spack -e ${environment} concretize --force | tee concretize-${environment}-${stack}.log
+    - ${STACK_LOCATION}/spack/bin/spack -e ${environment} concretize | tee concretize-${environment}-${stack}.log
 
     - cp ${SPACK_SYSTEM_CONFIG_PATH}/spack.lock spack-${environment}-${stack}.lock
   artifacts: