Configure nix during setup

scripts/Common/OS/install.fish

@@ -3,14 +3,12 @@ set -l dir (status dirname)
 source "$dir/../Scripts/config.fish"
 source "$dir/../Scripts/hooks.fish"
 
-function copyNixConfig -V dir
-    set -l configFile ~/.config/nix/nix.conf
-    mkdir -p (dirname "$configFile")
-    cp "$dir/../../../archiso/airootfs/root/.config/nix/nix.conf" "$configFile"
+function configureNix -V dir
+    source "$dir/../Software/nix/main.fish" configure user
 end
 
 if [ (id -u) -eq 0 ]
-    copyNixConfig
+    configureNix
     set -l name (getConfig valhalla.setupUser.name)
     set -l sudoConfig "/etc/sudoers.d/PortValhalla"
 
@@ -34,7 +32,7 @@ if [ (id -u) -eq 0 ]
     rm "$sudoConfig"
     userdel -r "$name"
 else
-    copyNixConfig
+    configureNix
     source "$dir/../Software/bash/main.fish"
     runHook initialize || true
     runHook installDrivers || true