$NetBSD$

--- src/VBox/Installer/darwin/VirtualBox/preflight.orig	2016-03-04 19:29:32.000000000 +0000
+++ src/VBox/Installer/darwin/VirtualBox/preflight
@@ -15,7 +15,7 @@
 set -e
 
 # Check environment.
-if [ "${INSTALLER_TEMP}x" == "x" ]; then
+if [ "${INSTALLER_TEMP}x" = "x" ]; then
     echo "Required environment variable INSTALLER_TEMP is missing. Aborting installation."
     exit 1;
 fi