1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/nix/run.cc b/third_party/nix/src/nix/run.cc
index b1ca56d751..241e0a2d78 100644
--- a/third_party/nix/src/nix/run.cc
+++ b/third_party/nix/src/nix/run.cc
@@ -17,7 +17,7 @@ using namespace nix;
 
 std::string chrootHelperName = "__run_in_chroot";
 
-struct CmdRun : InstallablesCommand {
+struct CmdRun final : InstallablesCommand {
   std::vector<std::string> command = {"bash"};
   StringSet keep, unset;
   bool ignoreEnvironment = false;