A number of topics reference mkDerivation: Introduce .inputDerivation for shell.nix build convenience by infinisil · Pull Request #95536 · NixOS/nixpkgs · GitHub as being the solution to how to build/cache/gc a shell environment, but as newcomer, I’m struggling to wire this up to a flake, where I don’t have an explicit shell.nix or mkShell invocation:
outputs = { self, nixpkgs, nix-ros-overlay, flake-utils }:
with flake-utils.lib;
eachSystem allSystems (system: let
pkgs = import nixpkgs {
inherit system;
overlays = [ nix-ros-overlay.overlay ];
};
in {
packages = pkgs.rosPackages;
devShell = import ./ros-base.nix { inherit pkgs; rosPackages = pkgs.rosPackages;};
}) // {
nixosModule = import ./modules;
};
It doesn’t seem like I can just grab devShell.inputDerivation or devShell."${system}".inputDerivation. How do I manage this?