The Rangers boss was pleased to secure his top summer target in David Templeton, but admits his squad isn’t as deep as he would have liked.
He said: "I think the fact that I said last week that I would have been happier with four or five bodies in and we had two in and one out would indicate that the maths says I’m not particularly happy.
"At least we know where we are now and what we've got. I know we're a little bit thin on the ground in defensive areas.
"So we have to carry a little bit of luck with injuries and suspensions but I know where we are so we'll just get on with it.
"It just didn't happen. We've been sitting with Neil Murray our chief scout who has been great with Kenny and Ian and me but it just hasn't happened.
"It was a combination of a lot of things but there is no use going on about it. They aren't here so we just have to get on with it.”
McCoist did confirm that Francesco Stella is only awaiting international clearance before being added to the squad.
The Australian-Italian agreed a one year deal with the Light Blues on deadline day.
McCoist added: "I'm not sure that the international clearance has come through.
"He was over in Italy beforehand and he's a player we have decided to give a shorter term contract to and hopefully he'll do well.”