📝Nix flakes

Nix is good at packing software but historically is bad at packing nix expressions.

Nix flakes is a standardized way to distribute nix expressions.

All nix flakes use hermetic evaluation: they cannot access any source of impurities:

• they don’t accept arguments

• cannot accept environment variables

• cannot access arbitrary filesystem locations

• cannot fetchgit/fetchurl without specifying rev or sha

A flake has some meta information, inputs (other flakes), and outputs (packages, nixos modules, hydra configurations)