--- a/rakelib/rbspec.rb	Mon Dec 12 22:43:48 2016 +0000
+++ b/rakelib/rbspec.rb	Tue Dec 13 13:33:24 2016 +0000
@@ -432,11 +432,16 @@
       if not (mandatory or referenced) then
         raise Exception.new("Nor mandator nor referenced prereqs asked. Must specify either `mandatoryy: true` or `referenced: true` or both")
       end
+
       # Special hack for stx:stc and stx:librun which are actually 
       # not a smalltalk packages. 
-      if @name == 'stx:stc' or @name == 'stx:librun' then
+      if @name == 'stx:stc'      
         return []
       end
+      if @name == 'stx:librun'
+        # stx:librun depends on STC
+        return ['stx:stc']
+      end
 
       root = BUILD_DIR if (not root && defined? BUILD_DIR)
       if not root then
@@ -452,7 +457,8 @@
         source << line
       end      
       source.encode!('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
-      prereqs = []      
+      # All packaged depends on STC - one cannot compile them without it!
+      prereqs = ['stx:stc']       
       if mandatory then        
         prereqs += source.scan(/^mandatoryPreRequisites(.*?)!$/m).flatten.to_s.scan(/#'([^']+)'/).flatten
       end