diff --git a/pkgs/development/libraries/sphinxbase/default.nix b/pkgs/development/libraries/sphinxbase/default.nix
index a02c11cba5b..17768a28ee0 100644
--- a/pkgs/development/libraries/sphinxbase/default.nix
+++ b/pkgs/development/libraries/sphinxbase/default.nix
@@ -1,13 +1,15 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchurl, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "sphinxbase-0.6.1";
 
   src = fetchurl {
-    url = "mirror://sourceforge/cmusphinx/sphinxbase/${name}.tar.gz";
+    url = "mirror://sourceforge/cmusphinx/${name}.tar.gz";
     sha256 = "1blra8igkqbqr7m2izbis1h3kkzblsqj9rkbw0f00025li8i1z55";
   };
 
+  buildInputs = [ pkgconfig ];
+
   meta = {
     description = "Support Library for Pocketsphinx";
     homepage = http://cmusphinx.sourceforge.net;