=== modified file 'bin/fsb'
--- bin/fsb	2013-05-22 18:18:29 +0000
+++ bin/fsb	2013-05-22 17:54:38 +0000
@@ -210,7 +210,7 @@
 }
 
 build_target() {
-	((${+fsb_targets[${1}]})) || die "no such target: $1"
+	(($+fsb_targets[${1}])) || die "no such target: $1"
 	target_info $1
 	target_stack_build
 }