Controlling output files from xproc

<?xml version="1.0" encoding="UTF-8"?>
<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
    version="1.0">
    <p:input port="source"/>
   <!--  <p:output port="result" primary="true" sequence="false"/>-->
    <p:output port="secondary" primary="false" sequence="true"/>

    <p:variable name="input-base" select="p:base-uri(/*)"/>
    <p:variable name="output-wadl" select="p:resolve-uri('foo.xml',$input-base)"/>

    <p:validate-with-xml-schema assert-valid="true" mode="strict" name="validate">
        <p:input port="schema">
            <p:document  href="xsd/wadl.xsd"/>
        </p:input>
    </p:validate-with-xml-schema>
    <p:xslt name="style" version="2.0">
        <p:input port="source">
            <p:pipe step="validate" port="result"/>
        </p:input>
        <p:input port="stylesheet">
            <p:document href="xsl/normalizeWadl.xsl"/>
        </p:input>
        <p:input port="parameters">
            <p:empty/>
        </p:input>
    </p:xslt>
    <p:validate-with-xml-schema assert-valid="true" mode="strict" name="post-validate">
        <p:input port="schema">
            <p:document  href="xsd/wadl.xsd"/>
        </p:input>
    </p:validate-with-xml-schema>
    <!-- This doesn't work. Guess you can't use AVTs in pipelines.
         But how do you get it to dereference the variable?-->
    <p:store href="{$output-wadl}">
        <p:log port="result" href="xproc1.log"/>
    </p:store>
    <p:for-each>
        <p:iteration-source>
            <p:pipe step="style" port="secondary"/>
        </p:iteration-source>
        <p:store encoding="utf-8" indent="true" omit-xml-declaration="false">
            <p:log port="result" href="xproc2.log"/>
            <!-- This has no apparent effect. The files still land in my home dir -->
            <p:with-option name="href" select="resolve-uri(base-uri(/*),$input-base)"/>
        </p:store>
    </p:for-each>

</p:declare-step>