The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
The setuptools-scm packages gained a setup hook, that sets it to the
derivation version automatically, so setting it to that manually has
become redundant.
This also affects downstream consumers of setuptools-scm, like hatch-vcs
or flit-scm.