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-rw-r--r--src/libstore/download.hh11
1 files changed, 6 insertions, 5 deletions
diff --git a/src/libstore/download.hh b/src/libstore/download.hh
index efddc55281fe..1f6098759a2d 100644
--- a/src/libstore/download.hh
+++ b/src/libstore/download.hh
@@ -9,10 +9,11 @@ namespace nix {
 
 struct DownloadOptions
 {
-    string expectedETag;
-    bool verifyTLS{true};
-    enum { yes, no, automatic } showProgress{yes};
-    bool head{false};
+    std::string expectedETag;
+    bool verifyTLS = true;
+    enum { yes, no, automatic } showProgress = yes;
+    bool head = false;
+    size_t tries = 1;
 };
 
 struct DownloadResult
@@ -31,7 +32,7 @@ struct Downloader
     Path downloadCached(ref<Store> store, const string & url, bool unpack,
         const Hash & expectedHash = Hash());
 
-    enum Error { NotFound, Forbidden, Misc };
+    enum Error { NotFound, Forbidden, Misc, Transient };
 };
 
 ref<Downloader> makeDownloader();