The os-release specification was updated in systemd > 230 to also include a VERSION_CODENAME parameter: https://github.com/systemd/systemd/commit/646b997c118e261c5ececc434dd40d0dbdbac4d8
Please replace the custom UBUNTU_CODENAME parameter by VERSION_CODENAME in yakkety and add VERSION_CODENAME to /etc/os-release to all stable releases.
The os-release specification was updated in systemd > 230 to also include a VERSION_CODENAME parameter: https:/ /github. com/systemd/ systemd/ commit/ 646b997c118e261 c5ececc434dd40d 0dbdbac4d8
Please replace the custom UBUNTU_CODENAME parameter by VERSION_CODENAME in yakkety and add VERSION_CODENAME to /etc/os-release to all stable releases.