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Reland #13918 (#14023)

* Revert "Reverting package changes until I can figure out how to fix Windows. (#14007)"

This reverts commit 6fda8ee821dd2e63e7949e57b10efde84bb0a3cc.

* Make prepare_package run on Windows
M
Michael Goderbauer committed
9e51a602993f33dd156230985391bbbbbaca8a74
Parent: 0c5dd8d
Committed by GitHub <noreply@github.com> on 1/10/2018, 9:37:36 PM