diff --git a/docs/source/conf.py b/docs/source/conf.py
index ebebcce..e18817c 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,9 +1,8 @@
 #!/usr/bin/env python3
-import os
 import sys
+import os
 
-sys.path += [os.path.join(os.path.dirname(__file__),
-                          "..", "..", "sbysrc")]
+sys.path.append(os.path.abspath(f"{__file__}/../../../sbysrc"))
 
 project = 'YosysHQ SBY'
 author = 'YosysHQ GmbH'