1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstore/download.cc b/src/libstore/download.cc
index 61e88c5c1..c7c1b93ad 100644
--- a/src/libstore/download.cc
+++ b/src/libstore/download.cc
@@ -907,7 +907,7 @@ CachedDownloadResult Downloader::downloadCached(
             printInfo("unpacking '%s'...", url);
             Path tmpDir = createTempDir();
             AutoDelete autoDelete(tmpDir, true);
-            unpackTarfile(store->toRealPath(storePath), tmpDir, baseNameOf(url));
+            unpackTarfile(store->toRealPath(storePath), tmpDir);
             auto members = readDirectory(tmpDir);
             if (members.size() != 1)
                 throw nix::Error("tarball '%s' contains an unexpected number of top-level files", url);