Welcome to Open Build Service (by Collabora)

To use this repository add an apt sources.list.d file with a deb line such as the following:

deb https://repositories.collabora.co.uk/obs/debian/ wheezy tools
deb-src https://repositories.collabora.co.uk/obs/debian/ wheezy tools
deb https://repositories.collabora.co.uk/obs/ubuntu/ precise tools
deb-src https://repositories.collabora.co.uk/obs/ubuntu/ precise tools
deb https://repositories.collabora.co.uk/obs/debian/ jessie tools
deb-src https://repositories.collabora.co.uk/obs/debian/ jessie tools
deb https://repositories.collabora.co.uk/obs/debian/ stretch tools
deb-src https://repositories.collabora.co.uk/obs/debian/ stretch tools

Also grab the keyring package collabora-obs-archive-keyring and install with dpkg -i

Debian stretch package
Debian jessie package
Debian wheezy package
Ubuntu precise package

More documentation can be found in the Collabora OBS Guide odt pdf.