diff --git a/source-builder/sb/options.py b/source-builder/sb/options.py
index 019f4ee..cf05935 100644
--- a/source-builder/sb/options.py
+++ b/source-builder/sb/options.py
@@ -114,7 +114,7 @@ class command_line:
     def _lo_path(self, opt, macro, value):
         if value is None:
             raise error.general('option requires a path: %s' % (opt))
-        value = path.shell(value)
+        value = path.abspath(value)
         self.opts[opt[2:]] = value
         self.defaults[macro] = value