--- /usr/portage/app-emulation/virtualbox/virtualbox-7.0.8a.ebuild	2023-05-29 21:40:43.000000000 +0100
+++ /usr/local/portage/app-emulation/virtualbox/virtualbox-7.0.8a.ebuild	2023-08-22 17:35:30.136961777 +0100
@@ -568,7 +568,9 @@
 	fi
 
 	# set an env-variable for 3rd party tools
-	echo -n "VBOX_APP_HOME=${vbox_inst_path}" > "${T}/90virtualbox"
+	echo "VBOX_APP_HOME=${vbox_inst_path}" > "${T}/90virtualbox"
+	# environment variable used during SDK binding installation
+	echo -n "VBOX_INSTALL_PATH=${vbox_inst_path}" >> "${T}/90virtualbox"
 	doenvd "${T}/90virtualbox"
 
 	if use sdl; then