(import
  (
    let lock = builtins.fromJSON (builtins.readFile ./flake.lock); in
    fetchTarball {
      url = "https://git.pegasust.com/pegasust/boost/archive/${lock.nodes.boost.locked.rev}.tar.gz";
      sha256 = lock.nodes.boost.locked.narHash;
    }.flake-compat
  )
  { src = ./.; }
).shellNix