current state of things

system/modules/nix-meta.nix

@@ -1,12 +1,63 @@
-{ pkgs, ... }:
 {
-  environment.systemPackages = with pkgs; [
-    home-manager
-    cachix
-    nixfmt-rfc-style
-    nil
-    statix
-    deadnix
-    npins
-  ];
+  pkgs,
+  lib,
+  inputs,
+  mainUser,
+  ...
+}:
+{
+  # these settings propagate to home-manager's nixpkgs
+  nixpkgs = {
+    config = {
+      allowUnfree = true;
+      allowUnfreePredicate = _: true;
+      cudaSupport = true;
+    };
+  };
+
+  nix = {
+    # add flake inputs to our registry to allow global use
+    registry = lib.mapAttrs (_: value: { flake = value; }) inputs;
+    settings = {
+      # trusted-users = ["bolt" "plank"];
+      experimental-features = [
+        "nix-command"
+        "flakes"
+        "pipe-operator"
+      ];
+      substitute = true;
+    };
+    extraOptions = ''
+      keep-outputs = true
+      keep-derivations = true
+    '';
+    optimise.automatic = true;
+    # package = pkgs.lix;
+  };
+
+  # services.smooooth = {
+  #   enable = true;
+  #   path = "/home/${mainUser}/.nix";
+  #   blockers = [
+  #     "hx"
+  #     {
+  #       nix = "die";
+  #     }
+  #   ];
+  #   nixPackage = pkgs.lix;
+  # };
+
+  programs.meat = {
+    enable = true;
+    flake = "/home/${mainUser}/.nix";
+  };
+
+  environment.systemPackages = builtins.attrValues {
+    inherit (pkgs)
+      home-manager
+      cachix
+      nixfmt-rfc-style
+      ;
+    inherit (inputs.nil.packages.${pkgs.system}) nil;
+  };
 }