It's hard to statically determine what parts of an executable affect the running of it. Many executable have timestamps in them that do affect how they run, so

It's hard to statically determine what parts of an executable affect the running of it. Many executable have timestamps in them that do affect how they run, so you can't just ignore all timestamps if you want reproducible builds. See https://reproducible-builds.org/docs/timestamps/ https://reproducible-builds.org/docs/timestamps/