diff -Nru distro-info-0.5/debian/changelog distro-info-0.5.1/debian/changelog
--- distro-info-0.5/debian/changelog	2012-01-23 18:18:57.000000000 +0000
+++ distro-info-0.5.1/debian/changelog	2012-02-25 15:15:02.000000000 +0000
@@ -1,3 +1,15 @@
+distro-info (0.5.1) unstable; urgency=low
+
+  [ Stefano Rivera ]
+  * Bump Standards-Version to 3.9.3, no changes needed.
+  * Update machine-readable copyright Format to 1.0.
+
+  [ Benjamin Drung ]
+  * DebianDistroInfo.hs, UbuntuDistroInfo.hs: Replace System import by
+    System.Environment and System.Exit import to fix build failure.
+
+ -- Benjamin Drung <bdrung@debian.org>  Sat, 25 Feb 2012 16:11:25 +0100
+
 distro-info (0.5) unstable; urgency=low
 
   * Allow retrieving the release version and full name with the Python module.
diff -Nru distro-info-0.5/debian/control distro-info-0.5.1/debian/control
--- distro-info-0.5/debian/control	2011-10-25 21:15:00.000000000 +0000
+++ distro-info-0.5.1/debian/control	2012-02-25 14:44:00.000000000 +0000
@@ -12,7 +12,7 @@
                python-all (>= 2.6.3-3~),
                python-setuptools,
                python-unittest2
-Standards-Version: 3.9.2
+Standards-Version: 3.9.3
 X-Python-Version: >= 2.6
 Vcs-Git: git://git.debian.org/git/collab-maint/distro-info.git
 Vcs-Browser: http://git.debian.org/?p=collab-maint/distro-info.git
diff -Nru distro-info-0.5/debian/copyright distro-info-0.5.1/debian/copyright
--- distro-info-0.5/debian/copyright	2012-01-23 14:07:43.000000000 +0000
+++ distro-info-0.5.1/debian/copyright	2012-02-25 14:45:38.000000000 +0000
@@ -1,4 +1,4 @@
-Format: http://svn.debian.org/wsvn/dep/web/deps/dep5.mdwn?op=file&rev=174
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: distro-info
 Upstream-Contact: Benjamin Drung <bdrung@debian.org>
 
diff -Nru distro-info-0.5/DebianDistroInfo.hs distro-info-0.5.1/DebianDistroInfo.hs
--- distro-info-0.5/DebianDistroInfo.hs	2011-10-11 16:11:32.000000000 +0000
+++ distro-info-0.5.1/DebianDistroInfo.hs	2012-02-25 15:10:38.000000000 +0000
@@ -18,9 +18,10 @@
 import Data.List
 import Data.Time
 import System.Console.GetOpt
+import System.Environment
+import System.Exit
 import System.IO
 import System.Locale
-import System
 
 import Text.CSV
 
diff -Nru distro-info-0.5/UbuntuDistroInfo.hs distro-info-0.5.1/UbuntuDistroInfo.hs
--- distro-info-0.5/UbuntuDistroInfo.hs	2011-10-11 16:11:54.000000000 +0000
+++ distro-info-0.5.1/UbuntuDistroInfo.hs	2012-02-25 15:10:20.000000000 +0000
@@ -18,9 +18,10 @@
 import Data.List
 import Data.Time
 import System.Console.GetOpt
+import System.Environment
+import System.Exit
 import System.IO
 import System.Locale
-import System
 
 import Text.CSV