Nix Pedantry (according to Jacob Birkett)

NIX_CODESTYLE.md

Suggestions

• Naming of overlay parameters, by scope
• Allow mkShell do the heavy lifting, use packages and inputsFrom
• Proper usage of nixpkgs.lib.extend using more overlays (TODO)
  • Also avoid importing your own global functions everywhere, and registering functions in config.
• Use nix-systems and pkgsFor.${system}

Controversial

• Using functions from self versus super fix-points
• Inheriting functions from nixpkgs.lib(?)

Bad Practices

• Using a formatter without setting the formatter output
• Be careful how you use import
  • The title of this article is misleading. What Fernando really means is this: don't pass arguments that are already handled by the NixOS module system.
• Why you don't need flake-utils
• Why you should filter your sources for package flakes
  • I'm not a fan of the proposed solution though. There are two that I like instead:
    • hercules-ci/gitignore.nix
    • Composable source filters (this is my own creation)