diff --git a/dartwrf/utils.py b/dartwrf/utils.py
index 10d178a8a0fa78f65da0455b184752fef1fabb33..10ddd914d9a2e8cfa0c69d79cb015915f8a29ca9 100755
--- a/dartwrf/utils.py
+++ b/dartwrf/utils.py
@@ -4,7 +4,8 @@ import builtins as __builtin__
 import subprocess
 
 def shell(cmd):
-    subprocess.check_output(cmd.split(' '), shell=True)
+    # subprocess.check_output(cmd.split(' '), shell=True)
+    os.system(cmd)
 
 def print(*args):
     __builtin__.print(*args, flush=True)