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-rw-r--r--src/libstore/download.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/libstore/download.cc b/src/libstore/download.cc
index da31029b4f87..56560203a092 100644
--- a/src/libstore/download.cc
+++ b/src/libstore/download.cc
@@ -169,7 +169,11 @@ struct CurlDownloader : public Downloader
 
         int progressCallback(double dltotal, double dlnow)
         {
-            act.progress(dlnow, dltotal);
+            try {
+              act.progress(dlnow, dltotal);
+            } catch (nix::Interrupted &) {
+              assert(_isInterrupted);
+            }
             return _isInterrupted;
         }