{ lib, mkCoqDerivation, which, coq, version ? null }:

mkCoqDerivation {
  pname = "ltac2";
  owner = "coq";
  inherit version;
  defaultVersion = with lib.versions; lib.switch coq.coq-version [
    { case = "8.10"; out = "0.3"; }
    { case = "8.9";  out = "0.2"; }
    { case = "8.8";  out = "0.1"; }
    { case = "8.7";  out = "0.1-8.7"; }
  ] null;
  release."0.3".sha256 = "0pzs5nsakh4l8ffwgn4ryxbnxdv2x0r1i7bc598ij621haxdirrr";
  release."0.2".sha256 = "0xby1kb26r9gcvk5511wqj05fqm9paynwfxlfqkmwkgnfmzk0x73";
  release."0.1".sha256 = "1zz26cyv99whj7rrpgnhhm9dfqnpmrx5pqizn8ihf8jkq8d4drz7";
  release."0.1-8.7".version = "0.1";
  release."0.1-8.7".rev     = "v0.1-8.7";
  release."0.1-8.7".sha256  = "0l6wiwi4cvd0i324fb29i9mdh0ijlxzggw4mrjjy695l2qdnlgg0";

  mlPlugin = true;

  meta = with lib; {
    description = "Robust and expressive tactic language for Coq";
    maintainers = [ maintainers.vbgl ];
    license = licenses.lgpl21;
  };
}