in installer/CustomAction/CouchIniAction.cs [84:90]
private static void PatchErlangCookie(Session session, string file)
{
//Patching erlang cookie
byte[] VMBuffer = File.ReadAllBytes(file);
string VMText = Regex.Replace(Encoding.UTF8.GetString(VMBuffer), @"-setcookie \S*", $"-setcookie {session.CustomActionData["COOKIEVALUE"]}");
File.WriteAllBytes(file, Encoding.UTF8.GetBytes(VMText));
}