You needed some fresh thyme. The supermarket is out.
Two rules of thumb when substituting dried herbs for fresh or vise-versa:
1. If the recipe calls for fresh herbs use one-third of that amount dried. And vise-versa. (Of course if your jar of dried herbs have been sitting on the shelf for three rears it may take a lot more than that.)
2. Add dried herbs near the beginning of food preparation and fresh herbs near the end.