diff --git a/pkgs/servers/samba/4.x.nix b/pkgs/servers/samba/4.x.nix
index 3d421e7a6ec..4da3ae362c4 100644
--- a/pkgs/servers/samba/4.x.nix
+++ b/pkgs/servers/samba/4.x.nix
@@ -20,11 +20,11 @@ with lib;
 
 stdenv.mkDerivation rec {
   name = "samba-${version}";
-  version = "4.7.10";
+  version = "4.7.12";
 
   src = fetchurl {
     url = "mirror://samba/pub/samba/stable/${name}.tar.gz";
-    sha256 = "0w5y6a7kiw5ap7hd84yglzk7cjax6lxlszd0wz1sxnmqx4a6hn9l";
+    sha256 = "0jmg39xigrh48j39r4f1390kmr1p3xbfxzfabln4b0r9qdmki70f";
   };
 
   outputs = [ "out" "dev" "man" ];
@@ -72,7 +72,9 @@ stdenv.mkDerivation rec {
       "--sysconfdir=/etc"
       "--localstatedir=/var"
     ]
-    ++ optional (!enableDomainController) "--without-ad-dc"
+    ++ [(if enableDomainController
+         then "--with-experimental-mit-ad-dc"
+         else "--without-ad-dc")]
     ++ optionals (!enableLDAP) [ "--without-ldap" "--without-ads" ]
     ++ optional (!enableAcl) "--without-acl-support"
     ++ optional (!enablePam) "--without-pam";