This appears to be a new regression in `pacman-7.1`. I noticed it while building pkgs with `devtools` (the default Arch build tools enable `namcap` which results in the just-built pkg [getting installed into the clean chroot with `makepkg --install`](https://gitlab.archlinux.org/archlinux/devtools/-/blob/v1.4.0/src/makechrootpkg.in?ref_type=tags#L306)). # Steps to reproduce: 1. build any pkg with `makepkg --install` 2. check the default cachedir and notice a stray "download" dir is left behind e.g. `/var/cache/pacman/pkg/download-GKRsZK`