You can set `fmt_args["subvolspec"] = name` in the subvol block just above the one you're changing here, just after we set `fmt_args["mountopts"]`. -- To view this comment on github, visit https://github.com/mulkieran/blivet/commit/f6ff8a328d89f61bb032eda3812b44b71c9f849c#commitcomment-11108631