diff --git a/extra/builder/util/util.factor b/extra/builder/util/util.factor
index 1081d3256d..9682fc1346 100644
--- a/extra/builder/util/util.factor
+++ b/extra/builder/util/util.factor
@@ -3,7 +3,7 @@ USING: kernel words namespaces classes parser continuations
        io io.files io.launcher io.sockets
        math math.parser
        combinators sequences splitting quotations arrays strings tools.time
-       parser-combinators new-slots accessors assocs.lib
+       sequences.deep new-slots accessors assocs.lib
        combinators.cleave bake calendar calendar.format ;
 
 IN: builder.util
@@ -108,4 +108,4 @@ USE: prettyprint
 
 ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
-: failsafe ( quot -- ) [ drop ] recover ;
\ No newline at end of file
+: failsafe ( quot -- ) [ drop ] recover ;