diff --git a/tools/configure.py b/tools/configure.py
index c00f136..bebe961 100755
--- a/tools/configure.py
+++ b/tools/configure.py
@@ -212,6 +212,12 @@ rule gen_run
   description = GEN_RUN
   command = $script $options $infiles >$out
 
+rule clean
+  description = CLEAN
+  command = ninja -t clean
+
+build clean: clean
+
 """