From e3b06a0213d06590614196ff90be2f016f139706 Mon Sep 17 00:00:00 2001
From: Tim Schumacher <timschumi@gmx.de>
Date: Mon, 5 Jan 2026 02:24:17 +0100
Subject: [PATCH] httptunnel: Compile with C17

---
 pkgs/by-name/ht/httptunnel/package.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/by-name/ht/httptunnel/package.nix b/pkgs/by-name/ht/httptunnel/package.nix
index 5f1e6a55f8b1..2b618642243e 100644
--- a/pkgs/by-name/ht/httptunnel/package.nix
+++ b/pkgs/by-name/ht/httptunnel/package.nix
@@ -16,6 +16,10 @@ stdenv.mkDerivation {
     hash = "sha256-fUaVHE3nxq3fU7DYCvaQTOoMzax/qFH8cMegFLLybNk=";
   };
 
+  # httptunnel makes liberal use of old C features, just selecting an old version
+  # is easier than patching around language updates.
+  env.NIX_CFLAGS_COMPILE = "-std=gnu17";
+
   nativeBuildInputs = [
     autoreconfHook
   ];