nix-store

Manipulate or query the Nix store. See also: nix3 store. 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 --query --tree /nix/store/…

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

du -cLsh $(nix-store --query --references /nix/store/…)

• Show all dependents of a particular store path:

nix-store --query --referrers /nix/store/…