It might be better to report the issue now (or to archive it), since the LibreLane branch is still in flux. As soon as I rebase leo/gf180mcu, you won't be able to fetch the same hash.
You can create a reproducible like so:
Enable the Nix shell
Start a run (there is a problem)
cd to librelane/runs/<timestamp>/xx-your-step/
Run: librelane.steps create-reproducible (This will create a LibreLane reproducible.)
cd into the created reproducible folder and run: ./run_ol.sh eject (This will make the reproducible standalone.)
Compress the reproducible folder and use it to file an issue
You can reproduce the issue by running ./run.sh inside reproducible.