From d2eb1ebfc2b71462b3431a49fab5aa512194bb04 Mon Sep 17 00:00:00 2001
From: Diogo Correia <me@diogotc.com>
Date: Thu, 21 May 2026 23:33:06 +0100
Subject: [PATCH] mup: fix build with gcc 15

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

diff --git a/pkgs/by-name/mu/mup/package.nix b/pkgs/by-name/mu/mup/package.nix
index 280e8d9ec1ed..b8a1ec2e0d88 100644
--- a/pkgs/by-name/mu/mup/package.nix
+++ b/pkgs/by-name/mu/mup/package.nix
@@ -60,6 +60,10 @@ stdenv.mkDerivation {
       --replace-fail /usr/share/doc $out/share/doc
   '';
 
+  env = {
+    NIX_CFLAGS_COMPILE = "-std=gnu17";
+  };
+
   enableParallelBuilding = false; # Undeclared dependencies + https://stackoverflow.com/a/19822767/1687334 for prolog.ps.
 
   meta = {