diff --git a/core/busybox/build b/core/busybox/build
index 0fb1cebe..ff92493f 100755
--- a/core/busybox/build
+++ b/core/busybox/build
@@ -1,10 +1,7 @@
 #!/bin/sh -e
 
 make
-make install
-
-# Work around no 'DESTDIR'.
-cp -a _install/. "$1"
+make CONFIG_PREFIX="$1" install
 
 # Fix package filesystem.
 mv "$1/bin/"* "$1/usr/bin"