Merge pull request #230663 from xworld21/texlive-faketime-preload-pure-glibc

    # libfaketime fixes non-determinism related to timestamps ignoring FORCE_SOURCE_DATE

    # we cannot fix further randomness caused by luatex; for further details, see

    # https://salsa.debian.org/live-team/live-build/-/blob/master/examples/hooks/reproducible/2006-reproducible-texlive-binaries-fmt-files.hook.chroot#L52

    FORCE_SOURCE_DATE=1 TZ= faketime -f '@1980-01-01 00:00:00 x0.001' fmtutil --sys --all | grep '^fmtutil' # too verbose

    # note that calling faketime and fmtutil is fragile (faketime uses LD_PRELOAD, fmtutil calls /bin/sh, causing potential glibc issues on non-NixOS)

    # so we patch fmtutil to use faketime, rather than calling faketime fmtutil

    substitute "$out/bin/fmtutil" fmtutil \

      --replace 'my $cmdline = "$eng -ini ' 'my $cmdline = "faketime -f '"'"'\@1980-01-01 00:00:00 x0.001'"'"' $eng -ini '

    FORCE_SOURCE_DATE=1 TZ= perl fmtutil --sys --all | grep '^fmtutil' # too verbose

    #texlinks "$out/bin" && wrapBin # do we need to regenerate format links?

    # Disable unavailable map files