build.sh

#!/bin/sh

fetchsync() {
    src=$1
    dest=$2

    if [ ! -d "$dest" ]; then
        git clone --bare "$src" "$dest"
    fi

    (
        cd "$dest"
        git fetch
    )
}

mkdir -p sources

fetchsync "git@github.com:grahamc/dns.git" "./sources/dns"

nix-build ./default.nix

default.nix

let
  pkgs = import <nixpkgs> {};

in pkgs.stdenv.mkDerivation {
  name = "dns-configs";

  src = pkgs.fetchgit {
    url = ./sources/dns;
    rev = "668f046c23c0ae36fadd5620f6df2560d962c12e";
    sha256 = "1xqyxv9q7mj6ww2pcdwpfjnx1x867n7i18m1zid2l597v3d4g7iq";
  };

  buildPhase = ''
    ./build.sh
  '';

  installPhase = ''
    cp -r ./bind-cfgs $out
  '';
}