diff --git a/.ctagsignore b/.ctagsignore
index c910d58a..c1b3fb23 100644
--- a/.ctagsignore
+++ b/.ctagsignore
@@ -1 +1,3 @@
 */target
+sims
+toolchains
diff --git a/scripts/gen-tags.sh b/scripts/gen-tags.sh
index afc7e228..80d0365f 100755
--- a/scripts/gen-tags.sh
+++ b/scripts/gen-tags.sh
@@ -14,4 +14,4 @@
 #   * tags file in the directory that this was called in
 
 # ctags wrapper
-ctags -R --exclude=@.ctagsignore --links=no
+ctags -R --exclude=@.ctagsignore --links=no --languages=scala,C,C++,python