diff --git a/basis/tools/deploy/shaker/shaker.factor b/basis/tools/deploy/shaker/shaker.factor
index 5630275aa1..4a9882c2e6 100755
--- a/basis/tools/deploy/shaker/shaker.factor
+++ b/basis/tools/deploy/shaker/shaker.factor
@@ -507,7 +507,7 @@ SYMBOL: deploy-vocab
 : write-vocab-manifest ( vocab-manifest-out -- )
     "Writing vocabulary manifest to " write dup print flush
     vocabs "VOCABS:" prefix
-    deploy-libraries get [ libraries get path>> ] map "LIBRARIES:" prefix append
+    deploy-libraries get [ libraries get path>> ] map prune "LIBRARIES:" prefix append
     swap utf8 set-file-lines ;
 
 : prepare-deploy-libraries ( -- )