diff --git a/nixos/tests/openldap.nix b/nixos/tests/openldap.nix
index 075bb5d1f6405..47d6a91843f11 100644
--- a/nixos/tests/openldap.nix
+++ b/nixos/tests/openldap.nix
@@ -118,7 +118,7 @@ in {
     };
   };
   testScript = { nodes, ... }: let
-    specializations = "${nodes.machine.config.system.build.toplevel}/specialisation";
+    specializations = "${nodes.machine.system.build.toplevel}/specialisation";
     changeRootPw = ''
       dn: olcDatabase={1}mdb,cn=config
       changetype: modify
diff --git a/pkgs/development/libraries/openldap/default.nix b/pkgs/development/libraries/openldap/default.nix
index ad4654d88b3e5..f853688af011e 100644
--- a/pkgs/development/libraries/openldap/default.nix
+++ b/pkgs/development/libraries/openldap/default.nix
@@ -12,15 +12,18 @@
 , openssl
 , systemdMinimal
 , libxcrypt
+
+# passthru
+, nixosTests
 }:
 
 stdenv.mkDerivation rec {
   pname = "openldap";
-  version = "2.6.3";
+  version = "2.6.4";
 
   src = fetchurl {
     url = "https://www.openldap.org/software/download/OpenLDAP/openldap-release/${pname}-${version}.tgz";
-    hash = "sha256-0qKh1x3z13OWscFq11AuZ030RuBgcrDlpOlBw9BsDUY=";
+    hash = "sha256-1RcE5QF4QwwGzz2KoXTaZrrfVZdHpH2SC7VLLUqkCZE=";
   };
 
   # TODO: separate "out" and "bin"
@@ -117,6 +120,10 @@ stdenv.mkDerivation rec {
     chmod +x "$out"/lib/*.{so,dylib}
   '';
 
+  passthru.tests = {
+    inherit (nixosTests) openldap;
+  };
+
   meta = with lib; {
     homepage = "https://www.openldap.org/";
     description = "An open source implementation of the Lightweight Directory Access Protocol";