The day the Mishkan was erected was 1st of Nissan, this is mentioned twice in the Parasha. No small coincidence that Moshe Rabbenu (7 Adar B) and Rabbi Nachman (1st Nissan) share the Bar Mitsvah Parsha of Vayyikra!
If the bones of Josef are so holy that only Moses and Yehoshua (both brought from the Nile where Josef was buried) can be responsible for carrying them, then how holy are the bones of Josef al (over/add) Josef!
Rabbenu IS the REAL Mishkan. That is what is being proven here (again).