diff --git a/pkgs/development/libraries/libfakekey/default.nix b/pkgs/development/libraries/libfakekey/default.nix
index fa04655341d..2a8e461d27e 100644
--- a/pkgs/development/libraries/libfakekey/default.nix
+++ b/pkgs/development/libraries/libfakekey/default.nix
@@ -11,6 +11,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ libX11 libXi libXtst xextproto ];
+  NIX_LDFLAGS = [
+    "-lX11"
+  ];
 
   meta = with stdenv.lib; {
     description = "X virtual keyboard library";