Do some debian builds not have lsb_release?
Solution 1:
There is an lsb-release package that supplies the lsb_release command. This is separate from the lsb, lsb-base, and lsb-core packages. None of the lsb packages are essential. So if your package needs lsb_release it should specify that it depends on lsb-release.
Solution 2:
Not all Debian builds have lsb_release. For example, even the official Ubuntu Docker image does not have lsb_release.
The alternative is to use cat /etc/os-release.