diff --git a/pkgs/by-name/li/libtcod/package.nix b/pkgs/by-name/li/libtcod/package.nix
index 78128320f587..75969c606f62 100644
--- a/pkgs/by-name/li/libtcod/package.nix
+++ b/pkgs/by-name/li/libtcod/package.nix
@@ -6,6 +6,7 @@
   SDL,
   libGLU,
   libGL,
+  libX11,
   upx,
   zlib,
 }:
@@ -36,10 +37,16 @@ stdenv.mkDerivation {
     SDL
     libGLU
     libGL
+    libX11
     upx
     zlib
   ];
 
+  env.NIX_CFLAGS_COMPILE = lib.concatStringsSep " " [
+    "-Wno-error=implicit-int"
+    "-Wno-error=incompatible-pointer-types"
+  ];
+
   meta = {
     description = "API for roguelike games";
     homepage = "http://roguecentral.org/doryen/libtcod/";