{
  lib,
  buildGoModule,
  fetchFromGitHub,
  vendorSha256 ? ""
}:
with lib;
let
  plugins = [
    "github.com/mholt/caddy-events-exec"
  ];

  imports = flip concatMapStrings plugins (pkg: "\t\t\t_ \"${pkg}\"\n");

  main = ''
    package main

    import (
      caddycmd "github.com/caddyserver/caddy/v2/cmd"

      _ "github.com/caddyserver/caddy/v2/modules/standard"
      ${imports}
    )

    func main() {
      caddycmd.Main()
    }
  '';

in buildGoModule rec {
  pname = "caddy";
  version = "2.6.4";

  subPackages = [ "cmd/caddy" ];

  src = fetchFromGitHub {
    owner = "caddyserver";
    repo = pname;
    # https://github.com/NixOS/nixpkgs/blob/nixos-21.11/pkgs/servers/caddy/default.nix
    rev = "v${version}";
    sha256 = "sha256-xNCxzoNpXkj8WF9+kYJfO18ux8/OhxygkGjA49+Q4vY=";
  };

  inherit vendorSha256;

  overrideModAttrs = (_: {
    preBuild    = "echo '${main}' > cmd/caddy/main.go";
    postInstall = "cp go.sum go.mod $out/ && ls $out/";
  });

  postPatch = ''
    echo '${main}' > cmd/caddy/main.go
    cat cmd/caddy/main.go
  '';

  postConfigure = ''
    cp vendor/go.sum ./
    cp vendor/go.mod ./
  '';

  meta = with lib; {
    homepage = https://caddyserver.com;
    description = "Fast, cross-platform HTTP/2 web server with automatic HTTPS";
    license = licenses.asl20;
    maintainers = with maintainers; [ rushmorem fpletz zimbatm ];
  };
}