diff --git a/archivebox/extractors/mercury.py b/archivebox/extractors/mercury.py
index 741c3291..07c02420 100644
--- a/archivebox/extractors/mercury.py
+++ b/archivebox/extractors/mercury.py
@@ -28,7 +28,7 @@ def ShellError(cmd: List[str], result: CompletedProcess, lines: int=20) -> Archi
     # parse out last line of stderr
     return ArchiveError(
         f'Got {cmd[0]} response code: {result.returncode}).',
-        *(
+        " ".join(
             line.strip()
             for line in (result.stdout + result.stderr).decode().rsplit('\n', lines)[-lines:]
             if line.strip()
diff --git a/archivebox/extractors/wget.py b/archivebox/extractors/wget.py
index 331f636b..b7adbea0 100644
--- a/archivebox/extractors/wget.py
+++ b/archivebox/extractors/wget.py
@@ -180,5 +180,9 @@ def wget_output_path(link: Link) -> Optional[str]:
 
         if str(search_dir) == link.link_dir:
             break
+    
+    search_dir = Path(link.link_dir) / domain(link.url).replace(":", "+") / urldecode(full_path)
+    if not search_dir.is_dir():
+        return str(search_dir.relative_to(link.link_dir))
 
     return None