String xml = new DefaultToolchainsXmlFactory().toXmlString(persistedToolchains.getDelegate());
        ToolchainsBuildingRequest request = new DefaultToolchainsBuildingRequest();
        request.setGlobalToolchainsSource(new StringSource(xml));

        ToolchainsBuildingResult result = toolchainBuilder.build(request);
        assertNotNull(result.getEffectiveToolchains());