diff --git a/pkgs/top-level/release.nix b/pkgs/top-level/release.nix
index b74976438c8..0a9030f8e50 100644
--- a/pkgs/top-level/release.nix
+++ b/pkgs/top-level/release.nix
@@ -32,7 +32,7 @@ let
               jobs.manual
               jobs.stdenv.x86_64-linux
               jobs.stdenv.i686-linux
-              #jobs.stdenv.x86_64-darwin
+              jobs.stdenv.x86_64-darwin
               jobs.linux.x86_64-linux
               jobs.linux.i686-linux
               # Ensure that X11/GTK+ are in order.
@@ -371,6 +371,12 @@ let
       linuxPackages_grsec_testing_server = { };
       linuxPackages_grsec_testing_server_xen = { };
 
-    } ));
+    } ))
+
+    # Temporary hack: build some stuff on Darwin.
+    // (with import ./release-lib.nix { supportedSystems = [ "x86_64-linux" "i686-linux" "x86_64-darwin" ]; }; mapTestOn {
+      stdenv = all;
+      hello = all;
+    });
 
 in jobs