Translations:Flakes/62/en

• fetchurl and fetchtar require a sha256 argument to be considered pure.
• builtins.currentSystem is non-hermetic and impure. This can usually be avoided by passing the system (i.e., x86_64-linux) explicitly to derivations requiring it.
• Imports from channels like <nixpkgs> can be made pure by instead importing from the output function in flake.nix, where the arguments provide the store path to the flake's inputs: