$NetBSD$

--- src/VBox/Installer/darwin/VirtualBox/preflight~	2015-07-10 23:31:33.000000000 +0900
+++ src/VBox/Installer/darwin/VirtualBox/preflight	2015-09-05 18:30:37.000000000 +0900
@@ -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
