nixcfg/machines/manager/mpi.nix

{ pkgs, lib, config, nodes, ... }:

with lib;

{
  environment.etc."mpi/hosts" = {
    text = concatMapStringsSep "\n"
      (node: "${node.config.networking.hostName} max_slots=32")
      (filter
        (node: elem "node" node.config.deployment.tags)
        (attrValues nodes));
  };
}