Reply To: Chabad Inspires all Jews to Yearn for Mashiach

The Aim Habanim Semacha quotes the Yerushalmi Masser Sheni (5,2) mentioned by the Tosfas Yom Tov there that we must build the Beis Hamikdash before the coming of meshiach.
The problem is that Eliyahu Hanavi must come first as we don’t know how to build it.