It has been updated 5 days ago (nixpkgs/pkgs/tools/graphics/quirc/default.nix at 68c9ed8bbed9dfce253cc91560bf9043297ef2fe · NixOS/nixpkgs · GitHub), maybe you should ask in the relevant PR at : quirc: Use dylib with absolute install name on Darwin by toonn · Pull Request #328420 · NixOS/nixpkgs · GitHub