Index: test/java/org/apache/ivy/plugins/resolver/PackagerResolverTest.java
===================================================================
--- test/java/org/apache/ivy/plugins/resolver/PackagerResolverTest.java	(revision 676039)
+++ test/java/org/apache/ivy/plugins/resolver/PackagerResolverTest.java	(working copy)
@@ -110,6 +110,7 @@
         resolver.setBuildRoot(_builddir.getAbsolutePath());
         resolver.setResourceCache(_cachedir.getAbsolutePath());
         resolver.setPreserveBuildDirectories(true);
+        resolver.setVerbose(true);
 
         resolver.setName("packager");
         assertEquals("packager", resolver.getName());
Index: src/java/org/apache/ivy/plugins/resolver/packager/PackagerCacheEntry.java
===================================================================
--- src/java/org/apache/ivy/plugins/resolver/packager/PackagerCacheEntry.java	(revision 676039)
+++ src/java/org/apache/ivy/plugins/resolver/packager/PackagerCacheEntry.java	(working copy)
@@ -25,11 +25,20 @@
 import java.io.OutputStream;
 import java.util.ArrayList;
 
+import org.apache.ivy.ant.IvyTask;
+import org.apache.ivy.core.IvyContext;
 import org.apache.ivy.core.IvyPatternHelper;
 import org.apache.ivy.core.module.descriptor.Artifact;
 import org.apache.ivy.core.module.id.ModuleRevisionId;
 import org.apache.ivy.plugins.resolver.util.ResolvedResource;
 import org.apache.ivy.util.FileUtil;
+import org.apache.ivy.util.Message;
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.BuildLogger;
+import org.apache.tools.ant.DefaultLogger;
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.taskdefs.Ant;
+import org.apache.tools.ant.taskdefs.Property;
 
 /**
  * Represents one entry in the cache of a {@link PackagerResolver}.
@@ -100,42 +109,54 @@
         // Write master ant build file
         saveFile("build.xml");
 
-        // Create new process argument list
-        ArrayList paramList = new ArrayList();
-        paramList.add("ant");
-        if (this.verbose) {
-            paramList.add("-verbose");
+        // Create ant sub-task
+        Ant ant = new Ant();
+        Project project = (Project) IvyContext.peekInContextStack(IvyTask.ANT_PROJECT_CONTEXT_KEY);
+        if (project == null) {
+            project = new Project();
+            project.init();
+            project.setName("packager");
         }
-        if (this.quiet) {
-            paramList.add("-quiet");
-        }
-        paramList.add("-Divy.packager.organisation=" + this.mr.getModuleId().getOrganisation());
-        paramList.add("-Divy.packager.module=" + this.mr.getModuleId().getName());
-        paramList.add("-Divy.packager.revision=" + this.mr.getRevision());
-        paramList.add("-Divy.packager.branch=" + this.mr.getBranch());
+        ant.setProject(project);
+        ant.setTaskName("packager");
+        ant.setDir(this.dir);
+        ant.setInheritAll(false);
+        ant.setInheritRefs(false);
+        ant.setTarget("build");
+
+        // Configure logging verbosity
+        BuildLogger logger = new DefaultLogger();
+        logger.setMessageOutputLevel(this.verbose ? Project.MSG_VERBOSE :
+          this.quiet ? Project.MSG_WARN : Project.MSG_INFO);
+        logger.setOutputPrintStream(System.out);
+        logger.setErrorPrintStream(System.err);
+        project.addBuildListener(logger);
+
+        // Set properties
+        setProperty(ant, "ivy.packager.organisation", "" + this.mr.getModuleId().getOrganisation());
+        setProperty(ant, "ivy.packager.module", "" + this.mr.getModuleId().getName());
+        setProperty(ant, "ivy.packager.revision", "" + this.mr.getRevision());
+        setProperty(ant, "ivy.packager.branch", "" + this.mr.getBranch());
         if (this.resourceCache != null) {
-            paramList.add("-Divy.packager.resourceCache=" + this.resourceCache.getCanonicalPath());
+            setProperty(ant, "ivy.packager.resourceCache", "" + this.resourceCache.getCanonicalPath());
         }
         if (this.resourceURL != null) {
-            paramList.add("-Divy.packager.resourceURL=" + getResourceURL());
+            setProperty(ant, "ivy.packager.resourceURL", "" + getResourceURL());
         }
         if (this.validate) {
-            paramList.add("-Divy.packager.validate=true");
+            setProperty(ant, "ivy.packager.validate", "true");
         }
-        String[] params = (String[]) paramList.toArray(new String[paramList.size()]);
 
-        // Run ant
-        SubProcess proc = new SubProcess(params, null, this.dir);
-        int result;
+        // Execute task
+        Message.verbose("performing packager resolver build in " + this.dir);
         try {
-            result = proc.run();
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
+            ant.execute();
+            this.built = true;
+        } catch (BuildException e) {
+e.printStackTrace(System.out);
+            Message.verbose("packager resolver build failed: " + e);
+            throw e;
         }
-        if (result != 0) {
-            throw new IOException("build in directory `" + this.dir + "' failed");
-        }
-        this.built = true;
     }
 
     /**
@@ -192,6 +213,13 @@
         }
     }
 
+    private Property setProperty(Ant ant, String name, String value) {
+        Property p = ant.createProperty();
+        p.setName(name);
+        p.setValue(value);
+        return p;
+    }
+
     private String getResourceURL() {
         String baseURL = IvyPatternHelper.substitute(this.resourceURL, this.mr.getOrganisation(),
           this.mr.getName(), this.mr.getRevision(), null, null, null, null,