=== modified file 'common.zsh'
--- common.zsh	2017-12-06 19:28:19 +0000
+++ common.zsh	2017-12-06 19:20:20 +0000
@@ -239,7 +239,7 @@
 		run=( ifchange )
 	fi
 	if 
-	target=$(encode-args "${(o@)new_vars}").$name \
+	target=$(encode-args "$@").$name \
 		|| die "Failed to generate target name"
 	"$run[@]" meta/$target || die "Building $name failed ($new_vars)"