=== modified file 'bin/fsb'
--- bin/fsb	2017-10-12 23:28:00 +0000
+++ bin/fsb	2017-10-12 23:19:36 +0000
@@ -232,7 +232,7 @@
 build_target() {
 	((${+fsb_targets[${1}]})) || die "no such target: $1"
 	target_info $1
-	if (($#ARGS_PRETEND)); then
+	if (($+ARGS_PRETEND)); then
 		local n k v
 		for n in $(seq $#build_stack -1 1); do
 			printf "%d) %s:\n"  $[ $#build_stack + 1 - $n ] $build_stack[$n]