diff --git a/01_ENV/build-c.sh b/01_ENV/build-c.sh
index 2cf356d..70354e9 100755
--- a/01_ENV/build-c.sh
+++ b/01_ENV/build-c.sh
@@ -1,4 +1,3 @@
 #!/usr/bin/env bash
-bash clean.sh
 clang-6.0 -c func1.c main.c
 clang-6.0 -s func1.o main.o -lm