Install via niv

First add it to niv:

$ niv add ryantm/agenix

Install module via niv

Then add the following to your configuration.nix in the imports list:

{
  imports = [ "${(import ./nix/sources.nix).agenix}/modules/age.nix" ];
}

Install Home Manager module via niv

Add the following to your Home Manager configuration:

{
  imports = [ "${(import ./nix/sources.nix).agenix}/modules/age-home.nix" ];
}

Install CLI via niv

To install the agenix binary:

{
  environment.systemPackages = [ (pkgs.callPackage "${(import ./nix/sources.nix).agenix}/pkgs/agenix.nix" {}) ];
}