diff --git a/extra/mason/server/server.factor b/extra/mason/server/server.factor
index a57dfb714e..71de2cf7b6 100644
--- a/extra/mason/server/server.factor
+++ b/extra/mason/server/server.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2010 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: accessors calendar db db.sqlite db.tuples db.types kernel
-math math.order sequences ;
+math math.order sequences combinators.short-circuit ;
 IN: mason.server
 
 CONSTANT: +starting+ "starting"
@@ -64,6 +64,13 @@ counter "COUNTER" {
     builder new select-tuples
     [ current-timestamp>> 5 hours ago before? ] filter ;
 
+: broken-builders ( -- seq )
+    builder new select-tuples
+    [
+        clean-timestamp>>
+        { [ not ] [ 1 weeks ago before? ] } 1||
+    ] filter ;
+
 : mason-db ( -- db ) "resource:mason.db" <sqlite-db> ;
 
 : with-mason-db ( quot -- )
diff --git a/extra/webapps/mason/dashboard.xml b/extra/webapps/mason/dashboard.xml
index 8ab1ccdc82..4ce01bff83 100644
--- a/extra/webapps/mason/dashboard.xml
+++ b/extra/webapps/mason/dashboard.xml
@@ -9,8 +9,15 @@
 	</t:form>
 
 	<h1>Crashed build machines</h1>
+	<p>Crashed machines have not sent a heartbeat for several hours.</p>
+
 	<t:xml t:name="crashed" />
 
+	<h1>Broken build machines</h1>
+	<p>Broken machines have not had a successful build for over a week.</p>
+
+	<t:xml t:name="broken" />
+
 	<h1>Make a release</h1>
 	<t:form t:action="$mason-app/dashboard/make-release">
 		<table>
diff --git a/extra/webapps/mason/dashboard/dashboard.factor b/extra/webapps/mason/dashboard/dashboard.factor
index 57ce008006..c6edd2ec99 100644
--- a/extra/webapps/mason/dashboard/dashboard.factor
+++ b/extra/webapps/mason/dashboard/dashboard.factor
@@ -4,8 +4,8 @@ USING: accessors kernel mason.server furnace.actions
 html.forms sequences xml.syntax webapps.mason.utils ;
 IN: webapps.mason.downloads
 
-: crashed-builder-list ( -- xml )
-    crashed-builders [
+: builder-list ( seq -- xml )
+    [
         [ package-url ] [ [ os>> ] [ cpu>> ] bi "/" glue ] bi
         [XML <li><a href=<->><-></a></li> XML]
     ] map
@@ -15,6 +15,7 @@ IN: webapps.mason.downloads
     <page-action>
     [
         [
-            crashed-builder-list "crashed" set-value
+            crashed-builders builder-list "crashed" set-value
+            broken-builders builder-list "broken" set-value
         ] with-mason-db
     ] >>init ;