install: map debian_version 9.X to debian stretch without lsb_release
@@ -366,6 +366,9 @@ do_install() {
debian|raspbian)
dist_version="$(cat /etc/debian_version | sed 's/\/.*//' | sed 's/\..*//')"
case "$dist_version" in
+ 9)
+ dist_version="stretch"
+ ;;
8)
dist_version="jessie"
;;
