1diff --git a/third-party/py/pex/pex/common.py b/third-party/py/pex/pex/common.py
2index 76459ce23..eff411b20 100644
3--- a/third-party/py/pex/pex/common.py
4+++ b/third-party/py/pex/pex/common.py
5@@ -328,4 +328,7 @@ class Chroot(object):
6 def zip(self, filename, mode='wb'):
7 with contextlib.closing(zipfile.ZipFile(filename, mode)) as zf:
8 for f in sorted(self.files()):
9- zf.write(os.path.join(self.chroot, f), arcname=f, compress_type=zipfile.ZIP_DEFLATED)
10+ path = os.path.join(self.chroot, f)
11+ instant = 615532801
12+ os.utime(path, (instant, instant))
13+ zf.write(path, arcname=f, compress_type=zipfile.ZIP_DEFLATED)