=== modified file 'common.zsh'
--- common.zsh	2017-11-30 20:35:50 +0000
+++ common.zsh	2017-11-30 20:32:27 +0000
@@ -92,12 +92,9 @@
 
 exit-if-unchanged() {
 	[[ -f $FILE ]] || return
-	if print-meta | cmp >&2 - $FILE; do
-		cp $FILE $OUT
-		exit 0
-	else
-		cp $FILE $FILE.prev
-	fi
+	print-meta | cmp >&2 - $FILE || return
+	cp $FILE $OUT
+	exit 0
 }
 
 depend() {