agenix/doc/overriding-age-binary.md

Overriding age binary

The agenix CLI uses age by default as its age implemenation, you can use the rage implementation with Flakes like this:

{pkgs,agenix,...}:{
  environment.systemPackages = [
    (agenix.packages.x86_64-linux.default.override { ageBin = "${pkgs.rage}/bin/rage"; })
  ];
}