nix-collect-garbage

Delete unused and unreachable nix store paths.

Generations can be listed using `nix-env --list-generations`.

• Delete all store paths unused by current generations of each profile:

sudo nix-collect-garbage --delete-old

• Simulate the deletion of old store paths:

sudo nix-collect-garbage --delete-old --dry-run

• Delete all store paths older than 30 days:

sudo nix-collect-garbage --delete-older-than {30d}

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