You can't install it with dpkg because dpkg is not this distro's package manager. It would conflict with xbps. So the dpkg in repo is built without install support. You can attempt to install it manually by doing:
ar x filename.deb
You can't install it with dpkg because dpkg is not this distro's package manager. It would conflict with xbps. So the dpkg in repo is built without install support. You can attempt to install it manually by doing:
ar x filename.deb