Methods part of incremental build of Copy, Zip, Jar and similar tasks should be rejected in execution phase

I had the same problem with lazy evaluation of classpath for manifest attributes. I found this solution and after further search, it think it should be possible to use lazy string evaluation like this (lazy expressions):

manifest {
        attributes {
            "${ -> configuration.collect { it.toURI() } .join(' ') }"
        }
}