From 054b938c5cd7e675c5526eaf888845e721286aea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6rg=20Thalheim?= <joerg@thalheim.io>
Date: Wed, 12 Dec 2018 00:53:20 +0000
Subject: [PATCH] libXt: fix cross-build

---
 pkgs/servers/x11/xorg/overrides.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index 68a2e93cb5f..faabd30fa08 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -145,7 +145,8 @@ self: super:
     configureFlags = attrs.configureFlags or []
       ++ malloc0ReturnsNullCrossFlag;
     propagatedBuildInputs = [ self.libSM ];
-    CPP = stdenv.lib.optionalString stdenv.isDarwin "clang -E -";
+    depsBuildBuild = [ buildPackages.stdenv.cc ];
+    CPP = if stdenv.isDarwin then "clang -E -" else "${stdenv.cc.targetPrefix}cc -E -";
     outputs = [ "out" "dev" "devdoc" ];
   });