diff --git a/vollerei/common/functions.py b/vollerei/common/functions.py
index 5192290..d1e2e17 100644
--- a/vollerei/common/functions.py
+++ b/vollerei/common/functions.py
@@ -228,12 +228,12 @@ def install_archive(game: GameABC, archive_file: Path | IOBase) -> None:
     archive_path = Path(archive_file)
     target_archive = None
     if archive_path.suffix == ".001":
-        archive_path = archive_path.with_suffix("")
-        if archive_path.suffix == ".zip":
+        archive_path_merged = archive_path.with_suffix("")
+        if archive_path_merged.suffix == ".zip":
             # .zip split archive
             archive = zipfile.ZipFile(archive_path, "r")
         else:
-            target_archive = multivolumefile.open(archive_path, mode='rb')
+            target_archive = multivolumefile.open(archive_path_merged, mode='rb')
             archive = py7zr.SevenZipFile(target_archive, "r")
     else:
         archive = _open_archive(archive_file)