diff -Nru sbuild-0.64.1/debian/changelog sbuild-0.64.1/debian/changelog
--- sbuild-0.64.1/debian/changelog	2014-02-25 09:09:46.000000000 +0000
+++ sbuild-0.64.1/debian/changelog	2014-03-05 00:18:12.000000000 +0000
@@ -1,3 +1,10 @@
+sbuild (0.64.1-1ubuntu3) trusty; urgency=medium
+
+  * debian/tests/build_procenv: on Ubuntu, select the correct archive mirror
+    for the build architecture.
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Tue, 04 Mar 2014 16:18:11 -0800
+
 sbuild (0.64.1-1ubuntu2) trusty; urgency=medium
 
   * debian/tests/control: Add missing debootstrap test dependency.
diff -Nru sbuild-0.64.1/debian/tests/build_procenv sbuild-0.64.1/debian/tests/build_procenv
--- sbuild-0.64.1/debian/tests/build_procenv	2013-11-04 12:57:38.000000000 +0000
+++ sbuild-0.64.1/debian/tests/build_procenv	2014-03-05 00:17:19.000000000 +0000
@@ -36,7 +36,14 @@
     release=$(distro-info --devel)
     components=main,universe
 
-    url=http://archive.ubuntu.com/ubuntu
+    case $(dpkg --print-architecture) in
+        amd64|i386)
+            url=http://archive.ubuntu.com/ubuntu
+            ;;
+        *)
+            url=http://ports.ubuntu.com/ubuntu-ports
+            ;;
+    esac
 elif [ "$distro" = debian ]
 then
     # Build chroot for latest stable release since