1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix/hash.cc b/src/nix/hash.cc
index 8d4bc7826..d9079d551 100644
--- a/src/nix/hash.cc
+++ b/src/nix/hash.cc
@@ -85,7 +85,7 @@ struct CmdHashBase : Command
 
             switch (mode) {
             case FileIngestionMethod::Flat:
-                readFileSource(path)->drainInto(*hashSink);
+                *hashSink << readFileSource(path);
                 break;
             case FileIngestionMethod::Recursive:
                 *hashSink << dumpPath(path);