Flatpak-builder can't find lsb_release?

I’m new to building flatpak’s but I’m trying to build a project that uses cmake and it’s erroring because it can’t find lsb_release during the flatpak-builder process:

CMake Error at CMake/Utils.cmake:238 (message):
  Could not detect lsb_release executable, can not gather required
Call Stack (most recent call first):
  CMakeLists.txt:70 (get_linux_lsb_release_information)

Can anybody help me out?

It is a bug in the upstream software: they shouldn’t rely on it. I don’t have it on Fedora for example.

OK - Thanks for the information.