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.
This is a simple tool to scan Nixpkgs for violations of the packaging
guidelines, such as multiple packages with the same name, packages
that lack a description or license, and so on.
To use:
$ nix-env -i nixpkgs-lint
$ cd .../nixpkgs
$ nixpkgs-lint
Current statistics:
Number of packages: 8666
Number of missing maintainers: 3711
Number of missing licenses: 6159
Number of missing descriptions: 1337
Number of bad descriptions: 633
Number of name collisions: 277