Don't unzip the sources which were bundled originally. Guix strips them from

the source and uses pre-build packages.

Taken from https://anonscm.debian.org/viewvc/pkg-java/trunk/libxerces2-java/debian/patches/02_build_dont_unzip.patch?revision=14507

Index: b/build.xml

===================================================================

--- a/build.xml

+++ b/build.xml

@@ -247,7 +247,7 @@

     <copy file="${src.dir}/org/apache/xerces/impl/xpath/regex/message.properties"

       tofile="${build.src}/org/apache/xerces/impl/xpath/regex/message_en.properties"/>

-    <!-- now deal with API's:  -->

+    <!-- not needed for Debian

     <unzip src="${src.apis.zip}" dest="${build.src}">

         <patternset

             includes="org/xml/sax/** 

@@ -270,6 +270,7 @@

                 org/w3c/dom/xpath/**"

         />

     </unzip>

+    -->

     <!-- substitute tokens as needed -->

     <replace file="${build.dir}/src/org/apache/xerces/impl/Version.java" 

@@ -1232,7 +1233,7 @@

     <replace file="${build.dir}/src/org/apache/xerces/parsers/AbstractSAXParser.java"

              token="return (fConfiguration instanceof XML11Configurable);" value="return false;"/>

-    <!-- now deal with API's:  -->

+    <!-- not needed for Debian

     <unzip src="${src.apis.zip}" dest="${build.src}">

         <patternset

             includes="org/xml/sax/** 

@@ -1255,7 +1256,7 @@

                 org/w3c/dom/xpath/**"

         />

     </unzip>

-

+    -->

     <!-- substitute tokens as needed -->

     <replace file="${build.dir}/src/org/apache/xerces/impl/Version.java"