He said: "It's a disappointment. I wish we were playing next week, there is no doubt about that.
"But I'm just the same as everybody else now, I'll just look out the tartan scarf and bunnet and be cheering the [Scotland] boys on.
"In terms of our momentum, it has been good. We wish all our players all the best and the most important thing from our point of view is that they come back safe and sound. It's a concerning time for managers and coaches."
McCoist added: "It was a brilliant result for wee Stuart today at United that puts them into second place and obviously Celtic are at Tynecastle on Sunday.
"Everybody is talking about gaps but we just wanted to win the game. The three points were far more important than any gap.
"It's been a good week for us and we got another clean sheet so that was really pleasing."