diff --git a/pkgs/servers/x11/xorg/overrides.nix b/pkgs/servers/x11/xorg/overrides.nix
index 268c3fbc72f1..6014bd7fb19c 100644
--- a/pkgs/servers/x11/xorg/overrides.nix
+++ b/pkgs/servers/x11/xorg/overrides.nix
@@ -594,6 +594,8 @@ self: super:
   xf86videonouveau = super.xf86videonouveau.overrideAttrs (attrs: {
     nativeBuildInputs = attrs.nativeBuildInputs ++ [ autoreconfHook ];
     buildInputs =  attrs.buildInputs ++ [ xorg.utilmacros ];
+    # fixes `implicit declaration of function 'wfbScreenInit'; did you mean 'fbScreenInit'?`
+    NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
   });
 
   xf86videoglint = super.xf86videoglint.overrideAttrs (attrs: {