A defeat by play-off-bound Derby would not have altered Brighton’s promotion prospects too much, given they have an inferior goal difference to Middlesbrough.
Chris Hughton’s side will go to Teesside without suspended centre-back Dunk, who was sent off with seven minutes remaining for two yellow cards – the second of them coming after a reckless lunge on Craig Bryson.
Anthony Knockaert came closest to opening the scoring for Brighton against the Rams, his first-half free-kick being headed off the line by Jason Shackell.
But Derby looked the more likely of the two sides to find the net, particularly after half-time, and substitute Weimann fired in at the second attempt after David Stockdale had saved his initial shot.
However, Manchester United loanee Wilson turned in the equaliser after a goalmouth scramble from a corner to extend Brighton’s unbeaten run to 13 games.