Rewrite URL for marklogic 8

Question

I need to redirect requests, and I try to use this rewriter:

<rewriter xmlns="http://marklogic.com/xdmp/rewriter">
  <match-path matches="^/(\w+\.xqy)$">
    <set-path>/subfolder/$1</set-path>
  </match-path>
  <dispatch/>
</rewriter>

URL: http://marklogic:9012/query.xqy

Script is placed under /subfolder/query.xqy

But it gives "page not found, 404" result.

I also tried to check what path is at the end using following:

<match-path matches="^.*(\w+\.xqy)$">
  <set-path>$0</set-path>
  <set-query-param name="test">/smth/$1</set-query-param>
</match-path>

and then I print $test, and it has "/smth/$1" value, although the following

<set-query-param name="test">$1</set-query-param>

gives "script.xqy" value.

Seems like a bug in Marklogic?!