upgrader_test.go:228:
    // Make it upgrade to some newer tools that can be
    // downloaded ok; it should stop retrying, download
    // the newer tools and exit.
    newerTools := envtesting.AssertUploadFakeToolsVersions(
        c, stor, s.Environ.Config().AgentStream(), s.Environ.Config().AgentStream(), version.MustParseBinary("5.4.6-precise-amd64"))[0]
c:/users/admini~1/appdata/local/temp/tmpxiwvw9/gogo/src/github.com/juju/juju/environs/testing/tools.go:200:
    c.Assert(err, jc.ErrorIsNil)
... value *os.LinkError = &os.LinkError{Op:"replace", Old:"c:\\users\\admini~1\\appdata\\local\\temp\\tmpxiwvw9\\gogo\\tmp-juju-testciki9w\\check-4037200794235010051\\30\\.tmp\\juju-filestorage-060037639", New:"c:\\users\\admini~1\\appdata\\local\\temp\\tmpxiwvw9\\gogo\\tmp-juju-testciki9w\\check-4037200794235010051\\30\\tools\\streams\\v1\\index2.json", Err:0x5} ("replace c:\\users\\admini~1\\appdata\\local\\temp\\tmpxiwvw9\\gogo\\tmp-juju-testciki9w\\check-4037200794235010051\\30\\.tmp\\juju-filestorage-060037639 c:\\users\\admini~1\\appdata\\local\\temp\\tmpxiwvw9\\gogo\\tmp-juju-testciki9w\\check-4037200794235010051\\30\\tools\\streams\\v1\\index2.json: Access is denied.")