Cache path info lookups in SQLite

This re-implements the binary cache database in C++, allowing it to be
used by other Store backends, in particular the S3 backend.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstore/download.cc b/src/libstore/download.cc
index 8cd3ad741e..eed630517d 100644
--- a/src/libstore/download.cc
+++ b/src/libstore/download.cc
@@ -225,7 +225,7 @@ Path Downloader::downloadCached(ref<Store> store, const string & url_, bool unpa
 {
     auto url = resolveUri(url_);
 
-    Path cacheDir = getEnv("XDG_CACHE_HOME", getEnv("HOME", "") + "/.cache") + "/nix/tarballs";
+    Path cacheDir = getCacheDir() + "/nix/tarballs";
     createDirs(cacheDir);
 
     string urlHash = printHash32(hashString(htSHA256, url));