> Even with nixpkgs pinning, our code failed to compile after only a few years. Outside of nixos itself, it does not appear that the build environment is the sa

> Even with nixpkgs pinning, our code failed to compile after only a few years. Outside of nixos itself, it does not appear that the build environment is the same; aspects of compilation change, and we ended up needing to change compiler flags a few years later, while expecting that we might need to again at some point. Was this using flakes or no? Since you mention pinning, I'm guessing not. An experience report, even if brief, would be very valuable to a Nix/NixOS community working seriously on reproducibility.