nix store optimise - Lix Reference Manual

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> Warning
> This program is experimental and its interface is subject to change.

# Name

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

# Synopsis

`nix store optimise` [option...]

# Examples

- 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, Lix maintains a content-addressed index of all the files in the Nix store in the directory `/nix/store/.links/`.