diff --git a/.gitlab-ci/upload-to-cache.sh b/.gitlab-ci/upload-to-cache.sh
index 8687983d7..e012caa93 100755
--- a/.gitlab-ci/upload-to-cache.sh
+++ b/.gitlab-ci/upload-to-cache.sh
@@ -5,4 +5,4 @@ set -f # disable globbing
 export IFS=' '
 
 echo "Signing and uploading paths" $OUT_PATHS
-exec nix copy --to "s3://nix-cache?scheme=http&endpoint=minio-gitlab-runner-cache&secret-key=${NIX_CACHE_KEYFILE}" $OUT_PATHS
+exec nix --debug copy --to "s3://nix-cache?scheme=http&endpoint=minio-gitlab-runner-cache&secret-key=${NIX_CACHE_KEYFILE}" $OUT_PATHS