diff --git a/lib/spack/spack/util/compression.py b/lib/spack/spack/util/compression.py
index e381b11..a42744d 100644
--- a/lib/spack/spack/util/compression.py
+++ b/lib/spack/spack/util/compression.py
@@ -197,7 +197,7 @@ def _py_untar(archive_file: str, remove_archive_file: bool = False) -> str:
         archive_file = archive_file_no_ext + "-input"
         shutil.move(archive_file_no_ext, archive_file)
     f_tar = tarfile.open(archive_file)
-    f_members = _data_filter(member=f_tar.getmembers(), dest_path=".")
+    f_members = [_data_filter(member=m, dest_path=".") for m in f_tar.getmembers()]
     f_tar.extractall(members=f_members)
     f_tar.close()
     if remove_archive_file: