tldr/pages/common/nix-store.2.md

nix-store

Manipulate or query the Nix store. See also: nix store.3. More information: https://nixos.org/manual/nix/stable/command-ref/nix-store.html.

• Collect garbage, such as removing unused paths:

nix-store --gc

• Hard-link identical files together to reduce space usage:

nix-store --optimise

• Delete a specific store path (must be unused):

nix-store --delete {{/nix/store/...}}

• Show all dependencies of a store path (package), in a tree format:

nix-store {{[-q|--query]}} --tree {{/nix/store/...}}

• Calculate the total size of a certain store path with all the dependencies:

du {{[-cLsh|--total --dereference --summarize --human-readable]}} $(nix-store {{[-q|--query]}} --references {{/nix/store/...}})

• Show all dependents of a particular store path:

nix-store {{[-q|--query]}} --referrers {{/nix/store/...}}