If recursive transcompiling is used in the development process, some code will survive all the way through the pipeline from beginning to end, and then back to the beginning again.
If the build process simply replaces the source code which has been deleted, it is (obviously) code which has been derived from something else and is therefore, by definition, derivative code.
If the build process fails, and a human needs to re-create the deleted code by hand, this is again, by definition, hand code.
The transcompilers and other tools which create derivative code, are usually themselves either in part, or entirely hand code.
This computer science article is a stub.