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-rw-r--r--third_party/nix/src/nix/doctor.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/nix/doctor.cc b/third_party/nix/src/nix/doctor.cc
index 3a5cd987a9..97c31d0376 100644
--- a/third_party/nix/src/nix/doctor.cc
+++ b/third_party/nix/src/nix/doctor.cc
@@ -19,7 +19,7 @@ std::string formatProtocol(unsigned int proto) {
   return "unknown";
 }
 
-struct CmdDoctor : StoreCommand {
+struct CmdDoctor final : StoreCommand {
   bool success = true;
 
   std::string name() override { return "doctor"; }