https://nix.dev/guides/best-practices.html#lookup-paths https://nix.dev/guides/best-practices.html#reproducible-nixpkgs-configuration ## Instances https://github.com/search?type=code&q=repo:NixOS/nixos-hardware+%22%3Cnixpkgs%3E%22 - https://github.com/NixOS/nixos-hardware/blob/40b1a28dce561bea34858287fbb23052c3ee63fe/mnt/reform/updateKernelPatches.nix#L2 - https://github.com/NixOS/nixos-hardware/blob/40b1a28dce561bea34858287fbb23052c3ee63fe/purism/librem/5r4/u-boot/build.nix#L1 - https://github.com/NixOS/nixos-hardware/blob/40b1a28dce561bea34858287fbb23052c3ee63fe/nxp/common/bsp/imx-optee-os.nix#L7
