Usefull commands

Configure

nixos-rebuild switch --flake flake_path_directory#hostname

nix flake update --extra-experimental-features "nix-command flakes"

Show changements between revisions

nix profile diff-closures --profile /nix/var/nix/profiles/system

nix store diff-closures /nix/var/nix/profiles/system-rev1-link /nix/var/nix/profiles/system-rev2-link

Clean system

List all profiles

nix profile history --profile /nix/var/nix/profiles/system

Remove all profiles older than 7 days

sudo nix profile wipe-history --older-than 7d --profile /nix/var/nix/profiles/system

nix profile wipe-history --older-than 7d --profile ~/.local/state/nix/profiles/home-manager

Clean up all useless store from old profiles

sudo nix store gc --debug

Optimize Store

nix-store --optimise

error: cached failure of attribute 'nixosConfigurations.perso-desktop.config.system.build.toplevel'

sudo rm -fr /root/.cache/nix/

To limit resources use during build

nixos-rebuild build-vm --cores 16 --max-jobs 1 --flake .#nixos-test

Or without NixOS

nix build .#nixosConfigurations.nixos-test.config.system.build.vm

Usefull links

• https://api.github.com/rate_limit
• https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents
• https://nixpk.gs/pr-tracker.html
• https://mobile.nixos.org/
• https://nixos.wiki/wiki/Build_flags

Sources

• https://github.com/ryan4yin/nix-config/tree/v0.0.2
• https://github.com/LudovicoPiero/dotfiles
• https://github.com/donovanglover/nix-config/