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Useful Nix Commands (Maybe NixOS specific)

Rebuild System and Switch to latest generation​

sudo nixos-rebuild switch

Repair System​

sudo nixos-rebuild switch --repair

Rebuild System and Boot into latest generation​

sudo nixos-rebuild boot

Rebuild Bootloader​

sudo nixos-rebuild --install-bootloader switch

Show changes after rebuild​

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

Shows colored diff of changes like this:

Version 217 -> 218:
  nix: ∅ → 2.13.6, +11643.2 KiB
  nixos-generators: ∅ → 1.7.0, +25.6 KiB
  nixos-system-nixy-zangetsu-Add-gRPC-Tools: ε → ∅, -68.9 KiB
  nixos-system-nixy-zangetsu-Feat-Switch-to-Host-Specific-Configs: ∅ → ε, +69.0 KiB
  unit-nix-gc.timer: ∅ → ε