diff -u sbuild-0.59.0/debian/changelog sbuild-0.59.0/debian/changelog
--- sbuild-0.59.0/debian/changelog
+++ sbuild-0.59.0/debian/changelog
@@ -1,3 +1,10 @@
+sbuild (0.59.0-1ubuntu2.1) lucid-proposed; urgency=low
+
+  * buildd: Declare Replaces and Breaks on ubuntu-dev-tools (<= 0.83) as
+    both packages contain /usr/bin/buildd. (LP: #558461)
+
+ -- Felix Geyer <debfx-pkg@fobos.de>  Fri, 14 May 2010 23:51:27 +0200
+
 sbuild (0.59.0-1ubuntu2) lucid; urgency=low
 
   * lib/Sbuild.pm: correctly calculate free space, and not used space. Fix
diff -u sbuild-0.59.0/debian/control sbuild-0.59.0/debian/control
--- sbuild-0.59.0/debian/control
+++ sbuild-0.59.0/debian/control
@@ -60,6 +60,8 @@
 Architecture: all
 Depends: ${perl:Depends}, libsbuild-perl, adduser, sbuild (>= 0.58), dupload, cron, exim4 | mail-transport-agent
 Suggests: wanna-build
+Replaces: ubuntu-dev-tools (<= 0.83)
+Breaks: ubuntu-dev-tools (<= 0.83)
 Description: Daemon for automatically building Debian binary packages from Debian sources
  The sbuild suite of programs (wanna-build, buildd and sbuild) are
  used to build binary packages from source packages.  The wanna-build