Academic folks: what is the proper way to cite simultaneously submitted work in a paper that won't have a DOI, URL., etc at the camera-ready deadline?

Background... I have two papers, one a high level overview of a broad effort, another talking about our results in a specific subset of the overall problem space. The overview paper needs to cite the subset paper as part of a discussion of different attacks on the overall problem.

Both papers were accepted to the same conference; the overlap was cleared with the PC and approved.

The question is how to handle the mechanics of the citation when the second paper won't have been published by the time I need a final version of the first. Do I just include an incomplete citation (title/authors/conference) and rely on the proceedings editor to fix up the details before both go live?