diff --git a/.xmonad/nixpkgs.nix b/.xmonad/nixpkgs.nix
index cc52ae8..b425619 100644
--- a/.xmonad/nixpkgs.nix
+++ b/.xmonad/nixpkgs.nix
@@ -4,7 +4,6 @@ let ghc = haskell.packages.ghc802;
 in
 stdenv.mkDerivation {
   name = "xmonad-testing";
-
   buildInputs = [
     # GHC and friends:
     (ghc.ghcWithPackages (p: with p; [
@@ -27,6 +26,8 @@ stdenv.mkDerivation {
     rsync # Needed by xmonad-web/gen-docs.sh
   ];

+  LD_LIBRARY_PATH = "${xorg.libXinerama}/lib:${xorg.libXext}/lib:${xorg.libX11}/lib:${xorg.libXrandr}/lib";
+
   shellHook = ''
     # Generate the configure script in X11:
     ( test -d x11 && cd x11 && autoreconf -f )