diff --git a/swh/lister/nixguix/lister.py b/swh/lister/nixguix/lister.py
index 0471b91..cd07caa 100644
--- a/swh/lister/nixguix/lister.py
+++ b/swh/lister/nixguix/lister.py
@@ -19,10 +19,9 @@ import base64
 from dataclasses import dataclass
 from enum import Enum
 import logging
-from pathlib import Path
 import random
 from typing import Any, Dict, Iterator, List, Optional, Tuple, Union
-from urllib.parse import parse_qsl, urlparse
+from urllib.parse import parse_qs, urlparse
 
 import requests
 from requests.exceptions import ConnectionError, InvalidSchema, SSLError
@@ -157,22 +156,15 @@ def is_tarball(urls: List[str], request: Optional[Any] = None) -> Tuple[bool, st
         if urlparsed.scheme not in ("http", "https", "ftp"):
             raise ArtifactNatureMistyped(f"Mistyped artifact '{url}'")
 
-        errors = []
-        query_params = dict(parse_qsl(urlparsed.query))
-        for path in [query_params.get(key) for key in ["f", "file", "url", "name"]] + [
-            urlparsed.path
-        ]:
-            if not path:
-                continue
-            try:
-                file_ = Path(path).suffixes[-1]
-                break
-            except IndexError as e:
-                errors.append(ArtifactWithoutExtension(e))
-
-        if errors:
-            raise errors[-1]
-        return file_.lstrip(".") in TARBALL_EXTENSIONS
+        tarball_ext = any(
+            path.endswith(tuple(TARBALL_EXTENSIONS))
+            for path in (urlparsed.path,) + tuple(parse_qs(urlparsed.query).keys())
+        )
+
+        if tarball_ext:
+            return True
+
+        raise ArtifactWithoutExtension()
 
     index = random.randrange(len(urls))
     url = urls[index]