Go ahead and hardlink to speed things up.

Change-Id: I898e8b74178be241fd47b21fa5f76c36f76cd34d
diff --git a/mendel-builder/aptly.conf b/mendel-builder/aptly.conf
index aa60d3d..905d551 100644
--- a/mendel-builder/aptly.conf
+++ b/mendel-builder/aptly.conf
@@ -3,8 +3,7 @@
   "gpgProvider": "gpg2",
   "FileSystemPublishEndpoints": {
     "unstable": {
-      "rootDir": "/var/lib/aptly/publishes/unstable",
-      "linkMethod": "copy"
+      "rootDir": "/var/lib/aptly/publishes/unstable"
     }
   }
 }