Diff of the two buildlogs:

--
--- b1/build.log	2023-04-15 09:39:46.111742144 +0000
+++ b2/build.log	2023-04-15 09:40:51.600835132 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri May 17 04:01:49 -12 2024
-I: pbuilder-time-stamp: 1715961709
+I: Current time: Sat Apr 15 23:39:50 +14 2023
+I: pbuilder-time-stamp: 1681551590
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./libdate-extract-perl_0.07.orig.tar.gz]
 I: copying [./libdate-extract-perl_0.07-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Mon Jan 23 07:18:00 2023 -12
+gpgv: Signature made Tue Jan 24 09:18:00 2023 +14
 gpgv:                using RSA key D1E1316E93A760A8104D85FABB3A68018649AA06
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./libdate-extract-perl_0.07-1.dsc: no acceptable signature found
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking libdate-extract-perl_0.07-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/19582/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink14-arm64.
+I: Changing host+domainname to test build reproducibility
+I: Adding a custom variable just for the fun of it...
+I: Changing /bin/sh to bash
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Apr 15 23:40 /bin/sh -> /bin/bash
+I: Setting pbuilder2's login shell to /bin/bash
+I: Setting pbuilder2's GECOS to second user,second room,second work-phone,second home-phone,second other
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="15" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.15(1)-release'
+  BUILDDIR=/build
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=8'
-  DISTRIBUTION='bookworm'
-  HOME='/var/lib/jenkins'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/var/lib/jenkins
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='19582'
-  PS1='# '
-  PS2='> '
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path
+  PBCURRENTCOMMANDLINEOPERATION=build
+  PBUILDER_OPERATION=build
+  PBUILDER_PKGDATADIR=/usr/share/pbuilder
+  PBUILDER_PKGLIBDIR=/usr/lib/pbuilder
+  PBUILDER_SYSCONFDIR=/etc
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=10454
   PS4='+ '
-  PWD='/'
-  SHELL='/bin/bash'
-  SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.1mN2q4h8/pbuilderrc_Z0p6 --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.1mN2q4h8/b1 --logfile b1/build.log libdate-extract-perl_0.07-1.dsc'
-  SUDO_GID='117'
-  SUDO_UID='110'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  USERNAME='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.16:3128'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.1mN2q4h8/pbuilderrc_pfl5 --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.1mN2q4h8/b2 --logfile b2/build.log --extrapackages usrmerge libdate-extract-perl_0.07-1.dsc'
+  SUDO_GID=117
+  SUDO_UID=110
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  USERNAME=root
+  _='I: set'
+  http_proxy=http://192.168.101.16:3128
 I: uname -a
-  Linux codethink13-arm64 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 16 07:10 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/19582/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 14 00:50 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -190,7 +222,7 @@
 Get: 76 http://deb.debian.org/debian bookworm/main arm64 libdatetime-format-natural-perl all 1.16-1 [79.8 kB]
 Get: 77 http://deb.debian.org/debian bookworm/main arm64 libtest-mocktime-perl all 0.17-2 [8612 B]
 Get: 78 http://deb.debian.org/debian bookworm/main arm64 libtest-mocktime-hires-perl all 0.08-2 [5972 B]
-Fetched 22.6 MB in 1s (30.4 MB/s)
+Fetched 22.6 MB in 1s (31.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19616 files and directories currently installed.)
@@ -516,8 +548,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/libdate-extract-perl-0.07/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../libdate-extract-perl_0.07-1_source.changes
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/libdate-extract-perl-0.07/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../libdate-extract-perl_0.07-1_source.changes
 dpkg-buildpackage: info: source package libdate-extract-perl
 dpkg-buildpackage: info: source version 0.07-1
 dpkg-buildpackage: info: source distribution unstable
@@ -727,58 +768,58 @@
 ok
 t/04-formats.t ......... 
 1..40
-ok 1 - got a date out of last Friday
-ok 2 - last Friday
-ok 3 - last Friday
-ok 4 - got a date out of Nov 13
-ok 5 - Nov 13
-ok 6 - got a date out of tomorrow
-ok 7 - tomorrow
-ok 8 - got a date out of 1986-11-13
-ok 9 - 1986-11-13
-ok 10 - got a date out of November 13th, 1986
-ok 11 - November 13th, 1986
-ok 12 - got a date out of Monday
-ok 13 - Monday
-ok 14 - got a date out of 1986/11/13
-ok 15 - 1986/11/13
-ok 16 - got a date out of 13th November
-ok 17 - 13th November
-ok 18 - got a date out of November 13th
-ok 19 - November 13th
-ok 20 - got a date out of next Monday
-ok 21 - next Monday
-ok 22 - next Monday
-not ok 23 - got a date out of 11-13-86 # TODO Not handled by us or DTFN yet
-#   Failed (TODO) test 'got a date out of 11-13-86'
+ok 1 - got a date out of 1986/11/13
+ok 2 - 1986/11/13
+not ok 3 - got a date out of previous Sat # TODO Not handled by us or DTFN yet
+#   Failed (TODO) test 'got a date out of previous Sat'
 #   at t/04-formats.t line 72.
-not ok 24 - No date parsed, so no use running the checker # TODO Not handled by us or DTFN yet
+not ok 4 - No date parsed, so no use running the checker # TODO Not handled by us or DTFN yet
 #   Failed (TODO) test 'No date parsed, so no use running the checker'
 #   at t/04-formats.t line 75.
-ok 25 - got a date out of 13 Nov
-ok 26 - 13 Nov
-ok 27 - got a date out of today
-ok 28 - today
-ok 29 - got a date out of Nov 13, 1986
-ok 30 - Nov 13th, 1986
-ok 31 - got a date out of 13 November 1986
-ok 32 - 13 November 1986
-ok 33 - got a date out of yesterday
-ok 34 - yesterday
-not ok 35 - got a date out of previous Sat # TODO Not handled by us or DTFN yet
-#   Failed (TODO) test 'got a date out of previous Sat'
+ok 5 - got a date out of Nov 13
+ok 6 - Nov 13
+ok 7 - got a date out of Nov 13, 1986
+ok 8 - Nov 13th, 1986
+ok 9 - got a date out of 13 Nov
+ok 10 - 13 Nov
+not ok 11 - got a date out of 11-13-86 # TODO Not handled by us or DTFN yet
+#   Failed (TODO) test 'got a date out of 11-13-86'
 #   at t/04-formats.t line 72.
-not ok 36 - No date parsed, so no use running the checker # TODO Not handled by us or DTFN yet
+not ok 12 - No date parsed, so no use running the checker # TODO Not handled by us or DTFN yet
 #   Failed (TODO) test 'No date parsed, so no use running the checker'
 #   at t/04-formats.t line 75.
-not ok 37 - got a date out of 11/13/1986 # TODO Not handled by us or DTFN yet
+ok 13 - got a date out of 13th November
+ok 14 - 13th November
+ok 15 - got a date out of 1986-11-13
+ok 16 - 1986-11-13
+ok 17 - got a date out of Monday
+ok 18 - Monday
+ok 19 - got a date out of Mon
+ok 20 - Mon
+not ok 21 - got a date out of 11/13/1986 # TODO Not handled by us or DTFN yet
 #   Failed (TODO) test 'got a date out of 11/13/1986'
 #   at t/04-formats.t line 72.
-not ok 38 - No date parsed, so no use running the checker # TODO Not handled by us or DTFN yet
+not ok 22 - No date parsed, so no use running the checker # TODO Not handled by us or DTFN yet
 #   Failed (TODO) test 'No date parsed, so no use running the checker'
 #   at t/04-formats.t line 75.
-ok 39 - got a date out of Mon
-ok 40 - Mon
+ok 23 - got a date out of tomorrow
+ok 24 - tomorrow
+ok 25 - got a date out of yesterday
+ok 26 - yesterday
+ok 27 - got a date out of November 13th, 1986
+ok 28 - November 13th, 1986
+ok 29 - got a date out of November 13th
+ok 30 - November 13th
+ok 31 - got a date out of today
+ok 32 - today
+ok 33 - got a date out of next Monday
+ok 34 - next Monday
+ok 35 - next Monday
+ok 36 - got a date out of last Friday
+ok 37 - last Friday
+ok 38 - last Friday
+ok 39 - got a date out of 13 November 1986
+ok 40 - 13 November 1986
 ok
 t/05-format.t .......... 
 1..3
@@ -792,7 +833,7 @@
 ok 2 - extracted the date as today
 ok
 All tests successful.
-Files=7, Tests=148,  8 wallclock secs ( 0.15 usr  0.02 sys +  7.04 cusr  0.47 csys =  7.68 CPU)
+Files=7, Tests=148,  8 wallclock secs ( 0.16 usr  0.02 sys +  7.68 cusr  0.54 csys =  8.40 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/libdate-extract-perl-0.07'
    create-stamp debian/debhelper-build-stamp
@@ -825,12 +866,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/10454/tmp/hooks/B01_cleanup finished
 I: unmounting dev/ptmx filesystem
 I: unmounting dev/pts filesystem
 I: unmounting dev/shm filesystem
 I: unmounting proc filesystem
 I: unmounting sys filesystem
 I: cleaning the build env 
-I: removing directory /srv/workspace/pbuilder/19582 and its subdirectories
-I: Current time: Fri May 17 04:02:45 -12 2024
-I: pbuilder-time-stamp: 1715961765
+I: removing directory /srv/workspace/pbuilder/10454 and its subdirectories
+I: Current time: Sat Apr 15 23:40:50 +14 2023
+I: pbuilder-time-stamp: 1681551650