digraph G {
  node[shape=box];
  edge[headport=n];

  subgraph cluster {
    hitch
    "acme.sh"
  }
  hitch -> varnish;
  varnish -> nginx;
  varnish -> pkb;
  varnish -> binary_trance;
  varnish -> wizards;
  varnish -> rust_melbourne;
  pkb -> syncthing;
  binary_trance -> postgresql:nw;
  wizards -> postgresql;
  rust_melbourne -> postgresql:ne;
}