I was just able to set this up by looking at their Nix example and swapping out pkgs.nix for pkgs.gfortran then changing the `.replit` file to compi

I was just able to set this up by looking at their Nix example and swapping out pkgs.nix for pkgs.gfortran then changing the `.replit` file to compile and run a hello world example I found online. Worked great!