{ description = "SK Extract"; inputs = { nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable"; }; outputs = { self, nixpkgs, }@inputs: let supportedSystems = [ "x86_64-linux" ]; forAllSystems = nixpkgs.lib.genAttrs supportedSystems; # I improved how you call in packages pkgs = forAllSystems ( system: import nixpkgs { inherit system; #v this can be adjusted to read args passed without impure later config = { allowUnfree = true; }; } ); in { packages = forAllSystems (system: { default = pkgs.${system}.callPackage ./nix/default.nix { }; }); devShells = forAllSystems (system: { default = pkgs.${system}.callPackage ./nix/devshell.nix { }; }); nixConfig = { # I would have like this to work but it requires the nix user to set an option. allowUnfree = true; }; }; }