os/default.nix

let
  inherit (default.inputs.nixos) lib;

  default = (import ./lib/compat).defaultNix;

  ciSystems = [
    "aarch64-linux"
    "x86_64-linux"
  ];

  filterSystems = lib.filterAttrs (system: _: lib.elem system ciSystems);

  recurseIntoAttrsRecursive = lib.mapAttrs (
    _: v: if lib.isAttrs v then recurseIntoAttrsRecursive (lib.recurseIntoAttrs v) else v
  );

  systemOutputs = lib.filterAttrs (
    name: set:
    lib.isAttrs set && lib.any (system: set ? ${system} && name != "legacyPackages") ciSystems
  ) default.outputs;

  ciDrvs = lib.mapAttrs (_: system: filterSystems system) systemOutputs;
in
(recurseIntoAttrsRecursive ciDrvs) // { shell = import ./shell.nix; }