From 995f419d84f8693960dec300899b95e67010fcc2 Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Sat, 14 Mar 2026 11:32:34 +0100
Subject: [PATCH] lowdown: sanity check output in installCheckPhase

---
 pkgs/by-name/lo/lowdown/package.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/by-name/lo/lowdown/package.nix b/pkgs/by-name/lo/lowdown/package.nix
index 6a4cadc42939..ba2e5c7c505a 100644
--- a/pkgs/by-name/lo/lowdown/package.nix
+++ b/pkgs/by-name/lo/lowdown/package.nix
@@ -98,7 +98,7 @@ stdenv.mkDerivation rec {
     runHook preInstallCheck
 
     echo '# TEST' > test.md
-    $out/bin/lowdown test.md
+    $out/bin/lowdown test.md | grep '[hH]1'
 
     runHook postInstallCheck
   '';