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-rw-r--r--third_party/nix/src/nix/optimise-store.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/nix/optimise-store.cc b/third_party/nix/src/nix/optimise-store.cc
index 594cc0e637a7..1b33ea3ec270 100644
--- a/third_party/nix/src/nix/optimise-store.cc
+++ b/third_party/nix/src/nix/optimise-store.cc
@@ -6,7 +6,7 @@
 
 using namespace nix;
 
-struct CmdOptimiseStore : StoreCommand {
+struct CmdOptimiseStore final : StoreCommand {
   CmdOptimiseStore() = default;
 
   std::string name() override { return "optimise-store"; }