Any, in principle. Minimal also means RAM-friendly. I can boot into X and open a terminal with less than 256 MB. Obviously if you add Firefox, you will need ar

Any, in principle. Minimal also means RAM-friendly. I can boot into X and open a terminal with less than 256 MB. Obviously if you add Firefox, you will need around 2 GB to run comfortably. And then a lot depends on what you develop for. NixOS is also a bit more disk intensive than other distros due to the way libraries are linked. But it's nothing too excessive.