diff --git a/ctags.in b/ctags.in
index c0a14d6..7896845 100644
--- a/ctags.in
+++ b/ctags.in
@@ -31,3 +31,7 @@
 --langdef=NIX
 --langmap=NIX:.nix
 --regex-NIX=/([^ \t*]*)[ \t]*=.*:/\1/f/
+
+# ignore sbt target directory
+--exclude=target
+--exclude=TSTP