Configure nix during setup

scripts/Common/Software/nix/main.fish

@@ -0,0 +1,15 @@
+#!/bin/env fish
+begin
+    set -l dir (status dirname)
+    source "$dir/../../Scripts/software.fish"
+
+    function configureSW -V dir -a scope
+        if [ "$scope" = "user" ]
+            set -l configFile ~/.config/nix/nix.conf
+            mkdir -p (dirname "$configFile")
+            cp "$dir/../../../../archiso/airootfs/root/.config/nix/nix.conf" "$configFile"
+        end
+    end
+
+    runInstaller $argv
+end