sudo cachix use all-hies
Cachix configuration written to /etc/nixos/cachix.nix.
Binary cache all-hies configuration written to /etc/nixos/cachix/all-hies.nix.

To start using cachix add the following to your /etc/nixos/configuration.nix:

    imports = [ ./cachix.nix ];

Then run:

    $ sudo nixos-rebuild switch