diff --git a/.gitignore b/.gitignore
index a227af3d8e9f..64ebb3cb656b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,7 +21,9 @@
 
 # where stuff are built
 /instdir
+/instdir_for_build
 /workdir
+/workdir_for_build
 
 # where the external downloads maybe located
 /external/tarballs