I forked nixpkgs and created a branch on which I made a change to a nixos module (
I’d like to test it out before making a PR, but I’m not sure how to do so. Is there a way to temporarily point my nixos configuration at my forked copy of nixpkgs?
-I nixpkgs=/path/to/your/nixpkgs to nixos-rebuild will make it use
/path/to/your/nixpkgs on a one-off basis.
I use GitHub - Mic92/nixos-shell: Spawns lightweight nixos vms in a shell for testing NixOS modules. It spawns a lightweight VM using a small configuration file. You probably need to set your NIX_PATH nixpkgs attribute when calling it.
I don’t know if this is recommendet but I sometimes do
nix-env -f /path/to/nixpkgs -i packagename.
This is useful for testing packages, but not nixos modules. You may also want to use -A with it as well: FAQ/Why not use nix-env -i foo? - NixOS Wiki
Either way, thanks for sharing
-I nixpkgs=/path/to/your/nixpkgs to nixos-rebuild seems like the most straightforward approach, and it worked like a charm. I really appreciate the help.