{
  channelsNixosStable = {
    ref = "nixos-18.09";
    rev = "7e88992a8c7b2de0bcb89182d8686b27bd93e46a";
  };
  channelsNixosUnstable = {
    ref = "nixos-unstable";
    rev = "44b02b52ea6a49674f124f50009299f192ed78bb";
  };
}