Cheat Sheet

Inputs

Update a single input: nix flake lock --update-input INPUT

NixOS

Update now: nixos-rebuild switch --flake .
Update on boot: nixos-rebuild boot --flake .

Home Manager

Bootstrap: nix run nixpkgs#home-manager -- switch --flake .
Update: home-manager switch --flake .

Managing NixOS generations

List: nix-env --profile /nix/var/nix/profiles/system --list-generations
Remove specific: nix-env --profile /nix/var/nix/profiles/system --delete-generations N ...

Managing Home Manager generations

List: home-manager generations
Remove specific: home-manager remove-generations N ...
Remove old: home-manager expire-generations "-7days"

Store

Garbage collect: nix store gc