I’m at a loss here. After searching for solutions, I’ve come to ask for opinions. In my configuration.nix I have 5 overlays defined. I’ve modified the source code of all of them at some point and their changes are implemented after running ‘sudo nixos-rebuild switch’. At some point one of the overlays just stopped making the changes. Running that command does nothing to change the program. I’ve removed the program and it’s overlay, run the garbage collector, and when I add them back, it’s exactly the same as it was. As if it’s building the program from an older cached version of the overlay. Any thoughts?

Thank you