Ignore stderr when doing the git revision check

(and use the older --git-dir instead of -C)

1 files changed, 2 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index d947bc58..1b517838 100755
--- a/setup.py
+++ b/setup.py
@@ -29,8 +29,9 @@ git_dir = os.path.join(current_dir, '.git')
 if os.path.exists(git_dir):
     try:
         import subprocess
-        result = subprocess.Popen(['git', '-C', git_dir, 'describe'],
+        result = subprocess.Popen(['git', '--git-dir', git_dir, 'describe'],
                                   stdout=subprocess.PIPE)
+                                  stderr=subprocess.DEVNULL)
         result.wait()
         data = result.stdout.read().decode('utf-8', errors='ignore')
         version = '.dev' + data.split('-')[1]