diff -urN hamcrest-1.3.old/build.xml hamcrest-1.3/build.xml
--- hamcrest-1.3.old/build.xml	2014-06-16 13:00:29.321699344 +0200
+++ hamcrest-1.3/build.xml	2014-06-16 14:24:30.160165471 +0200
@@ -27,6 +27,7 @@
     </target>
 
     <target name="core" depends="generator" description="Build core Hamcrest library">
+        <parallel threadcount="1">
         <java-to-jar srcdir="hamcrest-core/src/main/java" modulename="hamcrest-core"/>
 
         <!-- Generate one class with all static imports -->
@@ -36,7 +37,7 @@
               fork="yes"
               failonerror="yes"
               classpath="
-                build/hamcrest-core-${version}.jar;
+                build/temp/hamcrest-core-${version}.jar.contents;
                 build/hamcrest-generator-${version}.jar;
               ">
             <arg value="core-matchers.xml"/>
@@ -48,11 +49,13 @@
         <java-to-jar srcdir="build/temp/hamcrest-core/generated-code"
                      modulename="hamcrest-core"
                      classpath="build/hamcrest-core-${version}.jar"/>
+        </parallel>
     </target>
 
     <target name="library"
             depends="core,generator"
             description="Build library of matchers">
+	<parallel threadcount="1">
         <mkdir dir="build/temp/hamcrest-library/generated-code"/>
         <java-to-jar srcdir="hamcrest-library/src/main/java"
                      modulename="hamcrest-library"
@@ -75,6 +78,7 @@
         <java-to-jar srcdir="build/temp/hamcrest-library/generated-code"
                      modulename="hamcrest-library"
                      classpath="build/hamcrest-core-${version}.jar"/>
+        </parallel>
     </target>
 
     <target name="integration" depends="core, library" description="Build integration with external tools">