1 files changed, 7 insertions, 6 deletions
diff --git a/src/nix/main.cc b/src/nix/main.cc
index da920615f..c79d39459 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -54,12 +54,11 @@ static bool haveInternet()
 
 std::string programPath;
 
-struct HelpRequested { };
-
 struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
 {
     bool useNet = true;
     bool refresh = false;
+    bool helpRequested = false;
     bool showVersion = false;
 
     NixArgs() : MultiCommand(RegisterCommand::getCommandsFor({})), MixCommonArgs("nix")
@@ -74,7 +73,7 @@ struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
             .longName = "help",
             .description = "Show usage information.",
             .category = miscCategory,
-            .handler = {[&]() { throw HelpRequested(); }},
+            .handler = {[this]() { this->helpRequested = true; }},
         });
 
         addFlag({
@@ -337,7 +336,11 @@ void mainWrapped(int argc, char * * argv)
 
     try {
         args.parseCmdline(argvToStrings(argc, argv));
-    } catch (HelpRequested &) {
+    } catch (UsageError &) {
+        if (!args.helpRequested && !completions) throw;
+    }
+
+    if (args.helpRequested) {
         std::vector<std::string> subcommand;
         MultiCommand * command = &args;
         while (command) {
@@ -349,8 +352,6 @@ void mainWrapped(int argc, char * * argv)
         }
         showHelp(subcommand, args);
         return;
-    } catch (UsageError &) {
-        if (!completions) throw;
     }
 
     if (completions) {