Btrbk is a single perl script, and does not require any special installation procedures or libraries. In order to install the btrbk executable along with the documentation and an example configuration file, choose one of the following methods:
Download and unpack the latest btrbk source tarball and type:
sudo make install
btrbk is in portage:
emerge app-backup/btrbk
btrbk is in debian stable (utils): https://packages.debian.org/stable/utils/btrbk
Packages are also available via NeuroDebian: http://neuro.debian.net/pkgs/btrbk.html
btrbk is in the official Fedora repos: https://apps.fedoraproject.org/packages/btrbk
sudo dnf install btrbk
btrbk is in AUR: https://aur.archlinux.org/packages/btrbk/
btrbk is in the community repository
apk add btrbk
btrbk is in Void's current repository
xbps-install -S btrbk