Inplace plugin and "You cannot upgrade a plugin that is configured via BuildConfig" in Grails 1.3.5

My project stopped building from a fresh sandbox. I have an inplace plugin configured in BuildConfig.groovy:

grails.plugin.location.'cxf' = "modified-p开发者_如何学编程lugins/cxf-0.5.1"

It's also in application.properties.

When I try to build the project, I get an error:

Plugin [cxf] is aliased as [grails.plugin.location.cxf] to the location [modified-plugins/cxf-0.5.1] in grails-app/conf/BuildConfig.groovy You cannot upgrade a plugin that is configured via BuildConfig.groovy, remove the configuration to continue.

If I comment the plugin out of application.properties, it doesn't get packaged into war.

What can be possibly wrong with my project? How do I fix it?

Got this one. It's an empty plugin.xml generated, a known issue.