diff --git a/vollerei/common/functions.py b/vollerei/common/functions.py
index d1e2e17..02a9613 100644
--- a/vollerei/common/functions.py
+++ b/vollerei/common/functions.py
@@ -229,11 +229,11 @@ def install_archive(game: GameABC, archive_file: Path | IOBase) -> None:
     target_archive = None
     if archive_path.suffix == ".001":
         archive_path_merged = archive_path.with_suffix("")
+        target_archive = multivolumefile.open(archive_path_merged, mode='rb')
         if archive_path_merged.suffix == ".zip":
             # .zip split archive
-            archive = zipfile.ZipFile(archive_path, "r")
+            archive = zipfile.ZipFile(target_archive, "r")
         else:
-            target_archive = multivolumefile.open(archive_path_merged, mode='rb')
             archive = py7zr.SevenZipFile(target_archive, "r")
     else:
         archive = _open_archive(archive_file)