diff --git a/pkgs/development/libraries/libglvnd/default.nix b/pkgs/development/libraries/libglvnd/default.nix
index 4047c7bbefd08..fa9562947f815 100644
--- a/pkgs/development/libraries/libglvnd/default.nix
+++ b/pkgs/development/libraries/libglvnd/default.nix
@@ -33,7 +33,10 @@ stdenv.mkDerivation rec {
     "-DDEFAULT_EGL_VENDOR_CONFIG_DIRS=\"${addOpenGLRunpath.driverLink}/share/glvnd/egl_vendor.d:/etc/glvnd/egl_vendor.d:/usr/share/glvnd/egl_vendor.d\""
 
     "-Wno-error=array-bounds"
-  ] ++ lib.optional stdenv.cc.isClang "-Wno-error");
+  ] ++ lib.optionals stdenv.cc.isClang [
+    "-Wno-error"
+    "-Wno-int-conversion"
+  ]);
 
   configureFlags  = []
     # Indirectly: https://bugs.freedesktop.org/show_bug.cgi?id=35268