1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix/main.cc b/src/nix/main.cc
index d78312944..7172b4bd2 100644
--- a/src/nix/main.cc
+++ b/src/nix/main.cc
@@ -200,7 +200,7 @@ static void showHelp(std::vector<std::string> subcommand, MultiCommand & topleve
     if (!attr)
         throw UsageError("Nix has no subcommand '%s'", concatStringsSep("", subcommand));
 
-    auto markdown = state.forceString(*attr->value);
+    auto markdown = state.forceString(*attr->value, noPos, "while evaluating the lowdown help text");
 
     RunPager pager;
     std::cout << renderMarkdownToTerminal(markdown) << "\n";