Silver error when log in tty

I’m getting the following error as I log in a tty:

thread ‘main’ panicked at ‘unknown “$SILVER_SHELL”: -bash. Supported shells: bash, zsh, fish, powershell’, src/main.

Fresh RPi4 20.10 sway image.

I guess an ill-formated argument is passed somwhere but I can’t find it. I only found relevant references in my .bashrc but it looks clean as far as I can tell.

Maybe you need to install silver in the repo.