       @previous()? and @previous().build_num
 
     @duration = komp () =>
-      if @build_time_millis
-        Circle.time.as_duration(@build_time_millis)
+      if @build_time_millis()?
+        Circle.time.as_duration(@build_time_millis())
       else
         "still running"
 

    @start_to_end_string = komp =>
      "#{@start_time()} to #{@end_time()}"

    @duration = Circle.time.as_duration(@run_time_millis)

  toggle_minimize: =>
    if not @user_minimized?

class Build extends Obj
  observables: =>
    messages: []
    build_time_millis: null
    committer_name: null
    committer_email: null
    committer_date: null
