[Nix-dev] unable to delete a store path

[Marc Weber]

Try manually deleting it:
# unset readonly flag:
chattr -R -i STORE_PATH
# remove it:
rm -fr STORE_PATH

nix-store --verify should remove it automatically then.
If it doesn't work you may have to delete it from the database manually
(?). But then I'd make sure to have a backup.

There may be more options, though

Marc Weber