Ensure nix works during setup

scripts/Common/OS/install.fish

@@ -34,6 +34,7 @@ if [ (id -u) -eq 0 ]
     rm "$sudoConfig"
     userdel -r "$name"
 else
+    copyNixConfig;
     runHook initialize || true
     runHook installDrivers || true
     runHook installOS || true