@User: Magic is a bit over-aggressive in wanting to update timestamps. I think the intended behavior is that the standard cells should not be user writable, but that makes it more of a pain to do the PDK installation. I should probably introduce concept like a "readonly path" so that magic will know to ignore such files and not try to do things like timestamp updating. It has the concept; there's a "read-only" flag that can be set in the cell, but right now that's just based on the actual read/write status of the source file in the filesystem.