Some fixes for `with-private-mount`
Some fixes for `with-private-mount`

I don't recall what state this was in, but I'm pretty sure it wasn't
fully functional, even with these changes. `#RIIR`

benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles