nixpkgs/pkgs/development/interpreters/elixir/1.9.nix

{ mkDerivation }:

mkDerivation {
  version = "1.9.1";
  sha256 = "106s2a3dykc5iwfrd5icqd737yfzaz1dw4x5v1j5z2fvf46h96dx";
  minimumOTPVersion = "20";
}