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Notes about issue varying_mtimes_in_data_tar_gz_or_control_tar_gz in unstable

Identifier: varying_mtimes_in_data_tar_gz_or_control_tar_gz
Suites: stretch / buster / bullseye / unstable / experimental
URL: https://wiki.debian.org/ReproducibleBuilds/Howto#Members_of_control.tar_and_data.tar_have_varying_mtimes
Description: We currently adjust the file mtimes in dh_builddeb. Packages which
calls `dpkg --build` directly should have a prior call to:
`export SOURCE_DATE_EPOCH = $(shell date -d "$$(dpkg-parsechangelog --count 1 -SDate)" +%s)`
and
`find debian/tmp -newermt "@$$SOURCE_DATE_EPOCH" -print0 | \
xargs -0r touch --no-dereference --date="@$$SOURCE_DATE_EPOCH"`
Another option is to convert the build system to `dh`.
Packages in 'unstable' known to be affected by this issue:
(the 1/4 most-popular ones (within this issue) are underlined)

FTBFS icon 1 FTBFS packages in unstable/amd64: libguestfs

FTBR icon 4 unreproducible packages in unstable/amd64: kawari8 lcov libscout sympy

 

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