diff -Nru launchpad-buildd-142~213~ubuntu14.04.1/buildsnap launchpad-buildd-142/buildsnap
--- launchpad-buildd-142~213~ubuntu14.04.1/buildsnap	2016-12-10 16:32:01.000000000 +0000
+++ launchpad-buildd-142/buildsnap	2017-02-10 11:39:04.000000000 +0000
@@ -126,7 +126,10 @@
     def pull(self):
         """Run pull phase."""
         print("Running pull phase...")
-        env = {"SNAPCRAFT_LOCAL_SOURCES": "1"}
+        env = {
+            "SNAPCRAFT_LOCAL_SOURCES": "1",
+            "SNAPCRAFT_SETUP_CORE": "1",
+            }
         if self.options.proxy_url:
             env["http_proxy"] = self.options.proxy_url
             env["https_proxy"] = self.options.proxy_url
diff -Nru launchpad-buildd-142~213~ubuntu14.04.1/debian/bzr-builder.manifest launchpad-buildd-142/debian/bzr-builder.manifest
--- launchpad-buildd-142~213~ubuntu14.04.1/debian/bzr-builder.manifest	2016-12-10 16:32:01.000000000 +0000
+++ launchpad-buildd-142/debian/bzr-builder.manifest	1970-01-01 00:00:00.000000000 +0000
@@ -1,2 +0,0 @@
-# bzr-builder format 0.3 deb-version {debupstream}~213
-lp:launchpad-buildd revid:cjwatson@canonical.com-20161209180521-5okp7u3tlkdniral
diff -Nru launchpad-buildd-142~213~ubuntu14.04.1/debian/changelog launchpad-buildd-142/debian/changelog
--- launchpad-buildd-142~213~ubuntu14.04.1/debian/changelog	2016-12-10 16:32:01.000000000 +0000
+++ launchpad-buildd-142/debian/changelog	2017-02-10 14:53:44.000000000 +0000
@@ -1,10 +1,4 @@
-launchpad-buildd (142~213~ubuntu14.04.1) trusty; urgency=low
-
-  * Auto build.
-
- -- Launchpad Package Builder <noreply@launchpad.net>  Sat, 10 Dec 2016 16:32:01 +0000
-
-launchpad-buildd (142) UNRELEASED; urgency=medium
+launchpad-buildd (142) trusty; urgency=medium
 
   * lpbuildd.binarypackage: Pass DEB_BUILD_OPTIONS=noautodbgsym if we have
     not been told to build debug symbols (LP: #1623256).
@@ -13,8 +7,11 @@
   * lpbuildd.pottery.intltool: Remove unused and Python-3-unfriendly
     string/file conditional from ConfigFile.__init__.
   * Use Python-3-compatible forms of "print" and "except".
+  * buildsnap: Set SNAPCRAFT_SETUP_CORE=1 during pull phase so that
+    snapcraft will fetch and unpack the core snap for classic confinement
+    when necessary (LP: #1650946).
 
- -- Colin Watson <cjwatson@ubuntu.com>  Fri, 09 Dec 2016 16:15:49 +0000
+ -- Colin Watson <cjwatson@ubuntu.com>  Fri, 10 Feb 2017 14:53:43 +0000
 
 launchpad-buildd (141) trusty; urgency=medium