diff --git a/py/mkenv.mk b/py/mkenv.mk
index 8ae54f06bb..4bc71edd78 100644
--- a/py/mkenv.mk
+++ b/py/mkenv.mk
@@ -54,4 +54,6 @@ STRIP = $(CROSS_COMPILE)strip
 all:
 .PHONY: all
 
+.DELETE_ON_ERROR:
+
 MKENV_INCLUDED = 1