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-rw-r--r--src/libstore/legacy-ssh-store.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libstore/legacy-ssh-store.cc b/src/libstore/legacy-ssh-store.cc
index 4a2ac42f31c3..d804b27c1c8b 100644
--- a/src/libstore/legacy-ssh-store.cc
+++ b/src/libstore/legacy-ssh-store.cc
@@ -45,7 +45,7 @@ struct LegacySSHStore : public Store
     ref<Connection> openConnection()
     {
         auto conn = make_ref<Connection>();
-        conn->sshConn = master.startCommand("nix-store --serve");
+        conn->sshConn = master.startCommand("nix-store --serve --write");
         conn->to = FdSink(conn->sshConn->in.get());
         conn->from = FdSource(conn->sshConn->out.get());