diff --git a/pkgs/os-specific/linux/pam_ldap/default.nix b/pkgs/os-specific/linux/pam_ldap/default.nix
index 1eee7dbdac2..e7f2c8278e1 100644
--- a/pkgs/os-specific/linux/pam_ldap/default.nix
+++ b/pkgs/os-specific/linux/pam_ldap/default.nix
@@ -1,18 +1,23 @@
-{stdenv, fetchurl, pam, openldap}:
-   
+{ stdenv, fetchurl, pam, openldap, perl }:
+
 stdenv.mkDerivation rec {
-  name = "pam_ldap-183";
-   
+  name = "pam_ldap-186";
+
   src = fetchurl {
     url = "http://www.padl.com/download/${name}.tar.gz";
-    sha256 = "1l0mlwvas9dnsfcgbszbzq3bzhdkibn1c3x15fczq3i82faf5g5a";
+    sha256 = "0lv4f7hc02jrd2l3gqxd247qq62z11sp3fafn8lgb8ymb7aj5zn8";
   };
 
+  postPatch = ''
+    patchShebangs ./vers_string
+  '';
+
   preInstall = "
     substituteInPlace Makefile --replace '-o root -g root' ''
   ";
 
-  buildInputs = [pam openldap];
+  nativeBuildInputs = [ perl ];
+  buildInputs = [ pam openldap ];
 
   meta = {
     homepage = http://www.padl.com/OSS/pam_ldap.html;