=== modified file 'common.zsh'
--- common.zsh	2017-11-30 20:32:27 +0000
+++ common.zsh	2017-11-30 20:24:50 +0000
@@ -92,7 +92,9 @@
 
 exit-if-unchanged() {
 	[[ -f $FILE ]] || return
-	print-meta | cmp >&2 - $FILE || return
+	local current
+	current="$(print-meta)"
+	[[ "$(<$FILE)" == "$current" ]] || return
 	cp $FILE $OUT
 	exit 0
 }