diff -Nru launchpad-buildd-138/buildsnap launchpad-buildd-139/buildsnap
--- launchpad-buildd-138/buildsnap	2016-02-29 14:34:09.000000000 +0000
+++ launchpad-buildd-139/buildsnap	2016-04-01 13:35:01.000000000 +0000
@@ -80,10 +80,14 @@
         """
         args = [shell_escape(arg) for arg in args]
         path = shell_escape(path)
+        full_env = {
+            "LANG": "C.UTF-8",
+            }
         if env:
-            args = ["env"] + [
-                "%s=%s" % (key, shell_escape(value))
-                for key, value in env.items()] + args
+            full_env.update(env)
+        args = ["env"] + [
+            "%s=%s" % (key, shell_escape(value))
+            for key, value in full_env.items()] + args
         command = "cd %s && %s" % (path, " ".join(args))
         self.chroot(["/bin/sh", "-c", command], echo=echo)
 
diff -Nru launchpad-buildd-138/debian/changelog launchpad-buildd-139/debian/changelog
--- launchpad-buildd-138/debian/changelog	2016-03-03 18:44:13.000000000 +0000
+++ launchpad-buildd-139/debian/changelog	2016-04-05 15:11:02.000000000 +0000
@@ -1,3 +1,9 @@
+launchpad-buildd (139) trusty; urgency=medium
+
+  * buildsnap: Set LANG=C.UTF-8 when running snapcraft.
+
+ -- Colin Watson <cjwatson@ubuntu.com>  Tue, 05 Apr 2016 16:11:01 +0100
+
 launchpad-buildd (138) trusty; urgency=medium
 
   [ Colin Watson ]