diff --git a/pandora/manage.py b/pandora/manage.py
index 4800a366..56cc6a7b 100755
--- a/pandora/manage.py
+++ b/pandora/manage.py
@@ -10,7 +10,8 @@ def activate_venv(base):
         bin_path = os.path.join(base, 'bin')
         if bin_path not in old_os_path:
             os.environ['PATH'] = os.path.join(base, 'bin') + os.pathsep + old_os_path
-        site_packages = os.path.join(base, 'lib', 'python%s' % sys.version[:3], 'site-packages')
+        version = '%s.%s' % (sys.version_info.major, sys.version_info.minor)
+        site_packages = os.path.join(base, 'lib', 'python%s' % version, 'site-packages')
         prev_sys_path = list(sys.path)
         import site
         site.addsitedir(site_packages)