userspace: fix ordering typo

src/userspace/default.nix

@@ -31,14 +31,14 @@ in stdenv.mkDerivation {
     ln -s bin $out/sbin
     ln -s ../bin $out/usr/bin
     ln -s ../sbin $out/usr/sbin
+  '' + lib.optionalString withBusybox ''
+    cp -r ${busybox}/bin              $out/bin
+    chmod -R u+w $out/bin
   '' + lib.optionalString (bootScript != null) ''
     cp    ${bootScript} $out/boot.sh
     chmod +x $out/boot.sh
     ln -s boot.sh $out/init
     chmod +x $out/sbin/init
-  '' + lib.optionalString withBusybox ''
-    cp -r ${busybox}/bin              $out/bin
-    chmod -R u+w $out/bin
   '' + lib.optionalString withSignify ''
     cp    ${signify}/bin/signify      $out/bin/
   '' + lib.optionalString withLvm ''