diff --git a/pkgs/os-specific/linux/ffado/default.nix b/pkgs/os-specific/linux/ffado/default.nix
index 3b3d56052485..cdf8d8d2de5a 100644
--- a/pkgs/os-specific/linux/ffado/default.nix
+++ b/pkgs/os-specific/linux/ffado/default.nix
@@ -53,6 +53,11 @@ in stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
 
+  postInstall = ''
+    # prevent build tools from leaking into closure
+    echo 'See `nix-store --query --tree ${placeholder "out"}`.' > $out/lib/libffado/static_info.txt
+  '';
+
   meta = with stdenv.lib; {
     homepage = http://www.ffado.org;
     description = "FireWire audio drivers";