{ depot, lib, pkgs, ... }@args:
let
  inherit (builtins) foldl' mapAttrs;
  systemFor = config:
    (depot.third_party.nixos {
      configuration = config;
    }).system;
  systems = [ "porcorosso" "ixvm-fra01" "marukuru" ];
  rebuilder = system:
    pkgs.writeShellScriptBin "rebuilder" ''
      set -ue
      if [[ $EUID -ne 0 ]]; then
        exec sudo "$0" "$@"
      fi

      system="$(nix-build -E '(import <depot> {}).ops.nixos.${system}' --no-out-link)"
      nix-env -p /nix/var/nix/profiles/system --set "$system"
      "$system/bin/switch-to-configuration" switch
    '';
  systemCfgs = lib.genAttrs systems
    (name: import (./. + "/${name}") (args // { rebuilder = rebuilder name; }));
  mapAttrValues = (f: set: mapAttrs (name: f) set);
  systemDrvs = mapAttrValues (systemCfg: systemFor systemCfg) systemCfgs;
in systemDrvs