Docker tries to solve these problems only on the surface. Nothing in a Dockerfile guarantees reproducability. Try docker build of you favorite Dockerfile today

Docker tries to solve these problems only on the surface. Nothing in a Dockerfile guarantees reproducability. Try docker build of you favorite Dockerfile today and next week. The images probably won't be the same. Whereas NixOS allows you to build the exact same system now and whenever you want. Although, you'd have to pin the nixpkgs you are using.