diff --git a/pyconcrete-admin.py b/pyconcrete-admin.py
index f31e826..eb255fe 100755
--- a/pyconcrete-admin.py
+++ b/pyconcrete-admin.py
@@ -100,7 +100,7 @@ def parse_arg(self):
         else:
             try:
                 args = parser.parse_args()
-                self.verbose = args.verbose or IS_TEST_VERBOSE
+                self.verbose = getattr(args, 'verbose', False) or IS_TEST_VERBOSE
                 args.func(args)
             except PyConcreteError as e:
                 print('Error: ' + str(e))
diff --git a/setup.py b/setup.py
index 740724c..057db21 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,6 @@
 import hashlib
 import imp
 import os
-import subprocess
 import sys
 import sysconfig
 from distutils.command.build import build
@@ -359,9 +358,8 @@ def get_exe_link_args():
 
     # add -Lxxxx for link correct lib -lpython3.x
     if is_mac():
-        ldflags = subprocess.check_output('python{ver}-config --ldflags'.format(ver=ver), shell=True)
-        ldflags = ldflags.decode('utf8')
-        return [ld for ld in ldflags.split() if ld.startswith('-L')]
+        if not sysconfig.get_config_var('Py_ENABLE_SHARED'):  # reference from `python-config --ldflags`
+            return ['-L' + sysconfig.get_config_var('LIBPL')]
 
     return None