Name¶

nix store optimise - replace identical files in the store by hard links

Synopsis¶

nix store optimise [option…]

Examples¶

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Optimise the Nix store:

nix store optimise

Description¶

This command deduplicates the Nix store: it scans the store for regular files with identical contents, and replaces them with hard links to a single instance.

Note that you can also set auto-optimise-store to true in nix.conf to perform this optimisation incrementally whenever a new path is added to the Nix store. To make this efficient, Nix maintains a content-addressed index of all the files in the Nix store in the directory /nix/store/.links/.