{ callPackage }:

let
  mkFlutter = opts: callPackage (import ./flutter.nix opts) { };
  getPatches = dir:
    let files = builtins.attrNames (builtins.readDir dir);
    in map (f: dir + ("/" + f)) files;
in {
  stable = mkFlutter {
    pname = "flutter";
    channel = "stable";
    version = "1.12.13+hotfix.9";
    sha256Hash = "1ql3zvmmk5zk47y30lajxaam04q6vr373dayq15jv4vpc0fzif1y";
    patches = getPatches ./patches/stable;
  };
  beta = mkFlutter {
    pname = "flutter-beta";
    channel = "beta";
    version = "1.15.17";
    sha256Hash = "0iil6y6y477dhjgzx54ab5m9nj0jg4xl8x4zzd9iwh8m756r7qsd";
    patches = getPatches ./patches/beta;
  };
  dev = mkFlutter rec {
    pname = "flutter-dev";
    channel = "dev";
    version = "1.17.0-dev.5.0";
    filename = "flutter_linux_${version}-${channel}.tar.xz";
    sha256Hash = "0ks2jf2bd42y2jsc91p33r57q7j3m94d8ihkmlxzwi53x1mwp0pk";
    patches = getPatches ./patches/beta;
  };
}