Example corpus

Tiny illustrative Nix snippets other wiki pages can cite. Not a second tutorial track or full project templates. For multi-file “how it all fits” walkthroughs, see 16-configuration-examples.

Snippets are invented minimal fixtures—not copied host configs. They are not evaluated in this vault by default. Pins such as nixos-26.05 and system = "x86_64-linux" are illustrative; adjust for your machine. Flake examples need experimental nix-command and flakes (e.g. experimental-features = nix-command flakes in nix.conf).

Validate locally (when Nix is installed): node meta/examples/validate.mjs from the repo root — runs nix-instantiate --parse on standalone .nix files and nix flake check --no-build on flake directories. Skips with exit 0 if nix is not in PATH.

Contents

• hello-flake/flake.nix — minimal packages.default + devShells.default
• flake-with-checks/flake.nix — hello-flake plus checks.${system}.smoke and a tiny hydraJobs leaf
• overlay-snippet.nix — final: prev: overlay shape
• shell.nix — classic mkShell for nix-shell / direnv use nix
• minimal-module.nix — tiny NixOS module with mkEnableOption + lib.mkIf
• minimal-configuration.nix — tiny NixOS module entry shape (imports, boot, user, stateVersion)
• simple-package.nix — callPackage-shaped recipe wrapping hello (no fake fetch hash)
• fod-fetchurl.nix — fetchurl FOD with obviously placeholder hash
• networking-nftables-minimal.nix — nftables backend + firewall holes + extraInputRules
• impure-vs-pure-flake/broken-flake.nix / fixed-flake.nix — <nixpkgs> anti-pattern vs locked input
• systemd-oneshot-service.nix — declarative systemd.services oneshot unit