diff --git a/sphinx_multiversion/main.py b/sphinx_multiversion/main.py
index fb847142..5e960826 100644
--- a/sphinx_multiversion/main.py
+++ b/sphinx_multiversion/main.py
@@ -232,8 +232,7 @@ def main(argv=None):
                 ]
             )
             logger.debug("Running sphinx-build with args: %r", current_argv)
-            status = sphinx_build.build_main(current_argv)
-            if status not in (0, None):
-                return 3
+            cmd = (sys.executable, "-m", "sphinx", *current_argv)
+            subprocess.check_call(cmd)
 
     return 0