diff --git a/chaos_monkey/build_linux.sh b/chaos_monkey/build_linux.sh
index 2a0ac738f..c05c2891c 100644
--- a/chaos_monkey/build_linux.sh
+++ b/chaos_monkey/build_linux.sh
@@ -1,2 +1,2 @@
 #!/bin/bash
-pyinstaller monkey-linux.spec
+pyinstaller --clean monkey-linux.spec