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-rw-r--r--third_party/nix/src/nix/command.hh4
1 files changed, 2 insertions, 2 deletions
diff --git a/third_party/nix/src/nix/command.hh b/third_party/nix/src/nix/command.hh
index 4122bdd0e5..c297bfbd38 100644
--- a/third_party/nix/src/nix/command.hh
+++ b/third_party/nix/src/nix/command.hh
@@ -27,7 +27,7 @@ struct Command : virtual Args {
 
   virtual Examples examples() { return Examples(); }
 
-  void printHelp(const string& programName, std::ostream& out) override;
+  void printHelp(const std::string& programName, std::ostream& out) override;
 };
 
 class Store;
@@ -151,7 +151,7 @@ class MultiCommand : virtual Args {
 
   MultiCommand(Commands commands);
 
-  void printHelp(const string& programName, std::ostream& out) override;
+  void printHelp(const std::string& programName, std::ostream& out) override;
 
   bool processFlag(Strings::iterator& pos, Strings::iterator end) override;