let
  inherit (default.inputs.nixos) lib;
  default = (import ./lib/compat).defaultNix;
  ciSystems = ["aarch64-linux" "i686-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;}