anchor.diff:      man
     ];
   
  +  doCheck = !stdenv.isDarwin;
     checkInputs = [
       MailIMAPClient
       curl
  
positive.code: 
  buildPerlPackage rec {
    pname = "public-inbox";
    version = "1.7.0";
  
    src = fetchurl {
      url = "https://public-inbox.org/public-inbox.git/snapshot/public-inbox-${version}.tar.gz";
      sha256 = "sha256-hQSpmAFFVuPmXZvc7q6yP5Zhl86oar83OLYFn+42yMk=";
    };
  
    outputs = [ "out" "devdoc" "sa_config" ];
  
negative.code:     #   expected: anything else
      # waiting for child to reap grandchild...
      "spawn"
    ];
  
    testConditions = with lib;
  