bin/bin/music-renamer | 7 ++++++-

diff --git a/bin/bin/music-renamer b/bin/bin/music-renamer
index 43987d6e57506d3b844570523c48e7b98038bad4a56b478d6ff5639f2b3b8090..9009ec71c5f2c4aad0cba5dbd1cb436b87d8a8f90da43661cf9273027cc284c0 100755
--- a/bin/bin/music-renamer
+++ b/bin/bin/music-renamer
@@ -2,8 +2,13 @@ #!/usr/bin/env zsh
 
 ext=${1:-wav}
 
+print "for ext (wav mp3 opus wv) {"
+
 while read name ; do
     (( i++ ))
     print -v num -f %02d $i
-    print -r mv track${num}.cdda.$ext ${num}.${(qq)name}.$ext
+    print -n "[[ -e track${num}.cdda.\$ext ]] && "
+    print -r mv track${num}.cdda.\$ext ${num}.${(qq)name}.\$ext
 done
+
+print "}"