diff --git a/build.sh b/build.sh
index 5517138..b9f3eaa 100755
--- a/build.sh
+++ b/build.sh
@@ -2,7 +2,6 @@
 
 # environmental and build settings
 KEYFILE="${KEYFILE:-"$HOME/.ecdsakey"}"
-GLUON_TARGETS="${GLUON_TARGETS:-"ar71xx-generic ar71xx-nand mpc85xx-generic x86-generic x86-64"}"
 GLUON_PRIORITY="${GLUON_PRIORITY:-7}"
 
 # start of script
@@ -20,6 +19,10 @@ GLUON_DIR="${GLUON_SITEDIR}/gluon/"
 cd "${GLUON_DIR}"
 make update V=s
 
+if [ -z "${GLUON_TARGETS:-}" ]; then
+    GLUON_TARGETS="$(make list-targets)"
+fi
+
 for target in $GLUON_TARGETS; do
     echo "Building target ${target}"
     make clean GLUON_TARGET="$target" V=s