FUP broken on nixos-unstable-small

[andrevmatos]

Probably due to NixOS/nixpkgs#257458
It seems that this

flake-utils-plus/lib/mkFlake.nix

Lines 149 to 162 in 2bf0f91

	nixpkgs.config = selectedNixpkgs.config;
	nixpkgs.pkgs =
	# Make sure we don't import nixpkgs again if not
	# necessary. We can't use `config.nixpkgs.config`
	# because that triggers infinite recursion.
	if (hostConfig.nixpkgs.config == { }) then
	selectedNixpkgs
	else
	import patchedChannel
	{
	inherit (host) system;
	overlays = selectedNixpkgs.overlays;
	config = selectedNixpkgs.config // config.nixpkgs.config;
	} // { inherit (selectedNixpkgs) name input; };

conflicts with assertions on nixpkgs

Now, only one of pkgs or config should be passed to config.nixpkgs.

Error:

       error:
       Failed assertions:
       - Your system configures nixpkgs with an externally created instance.
       `nixpkgs.config` options should be passed when creating the instance instead.

       Current value:
       ...

[K900]

Line 149 here should just be removed, it's a no-op for either value of nixpkgs.pkgs.

[andrevmatos]

I'm running the fix here, system seems to build and run without any noticeable drawbacks like breakage from missing config.