posix/posix-2017-3-any.pkg.tar.zst build reproducible in our test framework:
c831aed29cda6dedd0baa731cbf6fe60fc18b79520b3f6bf0f5fe3e27ddcc88e posix-2017-3-any.pkg.tar.zst
cf394c1728ad019439125e0c09701a418af661f30e737cdaa4244e30a4da0e93 posix-2017-3-any.pkg.tar.zst-b1.BUILDINFO.txt
cf394c1728ad019439125e0c09701a418af661f30e737cdaa4244e30a4da0e93 posix-2017-3-any.pkg.tar.zst-b2.BUILDINFO.txt