diff --git a/mozilla/webtools/bugzilla/.bzrrev b/mozilla/webtools/bugzilla/.bzrrev
index a2af0fcd029..4a1c63bf916 100644
--- a/mozilla/webtools/bugzilla/.bzrrev
+++ b/mozilla/webtools/bugzilla/.bzrrev
@@ -1 +1 @@
-7120
\ No newline at end of file
+7121
\ No newline at end of file
diff --git a/mozilla/webtools/bugzilla/Bugzilla/Install/CPAN.pm b/mozilla/webtools/bugzilla/Bugzilla/Install/CPAN.pm
index af50b52e41b..52f762a9a20 100644
--- a/mozilla/webtools/bugzilla/Bugzilla/Install/CPAN.pm
+++ b/mozilla/webtools/bugzilla/Bugzilla/Install/CPAN.pm
@@ -77,7 +77,6 @@ use constant CPAN_DEFAULTS => {
     scan_cache => 'atstart',
 
     inhibit_startup_message => 1,
-    mbuild_install_build_command => './Build',
 
     bzip2 => bin_loc('bzip2'),
     curl => bin_loc('curl'),