Each machine can specify where the flake directory is

common/configuration.nix

@@ -9,6 +9,7 @@ in
 {
   imports = [
     ../modules/default.nix
+    ./flake-location.nix
   ];
 
   nixpkgs.overlays = [
@@ -29,9 +30,12 @@ in
   ];
 
   nix = {
-    nixPath = [ # "/home/benson/.nix-defexpr/channels"
+    settings.experimental-features = "nix-command flakes";
+
+    nixPath = [
+      "/home/benson/.nix-defexpr/channels"
       "nixpkgs=${inputs.nixpkgs}"
-      "nixos-config=${inputs.self}/hosts/${config.networking.hostName}/configuration.nix"
+      "nixos-config=${config.my.flakeLocation}/hosts/${config.networking.hostName}/configuration.nix"
       "/nix/var/nix/profiles/per-user/root/channels"];
 
     # MY GOD, this is what is used for nix develop, nix run, etc.
@@ -46,8 +50,6 @@ in
     };
   };
 
-  nix.settings.experimental-features = "nix-command flakes";
-
   # Enable networking
   networking.networkmanager.enable = true;
 

common/flake-location.nix

@@ -0,0 +1,13 @@
+{ inputs, config, lib, pkgs, ... }:
+let
+  system = "x86_64-linux";
+in
+{
+  options = {
+    my.flakeLocation = lib.mkOption {
+      default = "/etc/nixos/";
+      description = "Location of nixos flake for config";
+      type = lib.types.path;
+    };
+  };
+}

hosts/NixDawn/configuration.nix

@@ -14,6 +14,8 @@
     ./hardware-configuration.nix
   ];
 
+  my.flakeLocation = "/home/benson/nixos-config/";
+
   # Bootloader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;