nix store

Manipulate the Nix store. See also: tldr nix-store. More information: https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-store.html.

• Collect garbage, i.e. remove unused paths to reduce space usage:
  nix store gc
• Hard-link identical files together to reduce space usage:
  nix store optimise
• Delete a specific store path (most be unused):
  nix store delete {{/nix/store/...}}
• List a contents of the store path, on a remote store:
  nix store --store {{https://cache.nixos.org}} ls {{/nix/store/...}}
• Show the differences in versions between two store paths, with their respective dependencies:
  nix store diff-closures {{/nix/store/...}} {{/nix/store/...}}