From 07b331e8339250bc59916416820dea282f897364 Mon Sep 17 00:00:00 2001
From: Weijia Wang <9713184+wegank@users.noreply.github.com>
Date: Wed, 8 Nov 2023 10:20:53 +0100
Subject: [PATCH] guile-reader: fix build with clang 16

---
 pkgs/development/guile-modules/guile-reader/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/guile-modules/guile-reader/default.nix b/pkgs/development/guile-modules/guile-reader/default.nix
index edc6d73fffcc..fcb6e8c7a8a5 100644
--- a/pkgs/development/guile-modules/guile-reader/default.nix
+++ b/pkgs/development/guile-modules/guile-reader/default.nix
@@ -27,7 +27,11 @@ stdenv.mkDerivation rec {
     libffi
   ];
 
-  env.GUILE_SITE = "${guile-lib}/${guile.siteDir}";
+  env = {
+    GUILE_SITE = "${guile-lib}/${guile.siteDir}";
+  } // lib.optionalAttrs stdenv.cc.isClang {
+    NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
+  };
 
   configureFlags = [ "--with-guilemoduledir=$(out)/${guile.siteDir}" ];