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

                                                                                          nix3-store-optimise(1)