Ok, we have this in guix/build/ant-builde-system.scm, it is called strip-jar-timestamps.
This should be done also on ant-bootstrap. 2018-01-18 9:58 GMT+01:00 Gábor Boskovits <boskov...@gmail.com>: > This is due to the modification times of files included in the jar. > No other difference is listed in the diffoscope output. > > How do we deal with this in other packages? > That fix should be migrated to apply for this package also. >