ORCHARD PARK, N.Y. -- The Buffalo Bills haven't made a roster move in over a month, but that doesn't mean they're done building their team this offseason.

After hosting safety Dawan Landry and wide receiver Brad Smith earlier this month, the Bills are in wait-and-see mode with both of those potential veteran additions.

Part of the reason for that, general manager Doug Whaley said at his pre-draft news conference Monday, is that the Bills want to see how the upcoming draft unfolds. If they add a safety or wide receiver in the draft, it could lessen their need to sign Landry or Smith.

But there are other factors that have kept the Bills from signing either of those players.

Whaley noted that the NFL's May 12 free-agency deadline has been a consideration. As noted earlier this month, unrestricted free agents who sign after this date (which had been June 1 in previous years) do not count against the NFL's compensatory pick formula for the 2016 draft.

The website OverTheCap.com currently projects the Bills to receive two sixth-round picks in 2016, as a result of their net loss of free agents this offseason. Signing Landry or Smith before May 12 would likely result in the Bills losing one or both of those extra picks.

The decision for Landry or Smith to sign, Whaley said, is ultimately up to them. While there hasn't been high interest in either free agent, the Bills are limited financially in what they can offer each player, so the two veterans might decide they are best suited signing elsewhere.