I recently lost access to my regular darkroom where we had a lightproof tent to unload film into reels to develop. I do still have a darkroom I can make prints in but there are just a couple of light leaks from the room outside I can’t do anything about around the door and a window from this room to the next. It works fine for developing prints and I’ve never seen any fogging or anything.

I was wondering if instead of buying a bag I could jimmy a solution by doing it inside a sweater in this room? But I’m also worried about dust a lint? What if I cut a box in a way? I know it won’t be perfect, but does anyone have any DIY solutions that won’t require me to buy anything?