check for kiwi-ng using a builtin

live-build.sh

@@ -23,6 +23,10 @@ Options:
 OPTS=$(getopt -a -n live-build -o l:,o:,d,h \
   -l live-image:,output-dir:,debug,help -- "$@")
 
+function is_in_path() {
+  builtin type -P "${1}"
+}
+
 function usage() {
   echo "$__usage"
 }
@@ -52,7 +56,10 @@ if [ -e "/sys/fs/selinux/enforce" ]; then
   fi
 fi
 
-if [ ! -x "/usr/bin/kiwi-ng" ] || [ ! -x "$HOME/.local/bin/kiwi-ng" ]; then
+is_in_path kiwi-ng &> /dev/null
+ret_val=$?
+
+if [ "$ret_val" -ne "0" ]; then
   echo "kiwi-ng not found. kiwi packages are likely not installed on this system."
   exit 32
 fi