Diff of the two buildlogs:

--
--- b1/build.log	2025-09-06 11:12:42.076579359 +0000
+++ b2/build.log	2025-09-06 11:15:42.812812146 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Oct  9 05:31:56 -12 2026
-I: pbuilder-time-stamp: 1791567116
+I: Current time: Sun Sep  7 01:12:55 +14 2025
+I: pbuilder-time-stamp: 1757157175
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/forky-reproducible-base.tgz]
 I: copying local configuration
@@ -22,53 +22,85 @@
 dpkg-source: info: unpacking libtime-format-perl_1.16-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/815918/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3681468/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos1-amd64.
+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 Sep  6 11:13 /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/3681468/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3681468/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
-  DISTRIBUTION='forky'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="37" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=40 '
+  DIRSTACK=()
+  DISTRIBUTION=forky
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='3f81220cf1f643ab9b2215940233693d'
-  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='815918'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=75eb1c80c20844a38239a255daeecdd2
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-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=3681468
   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.cplohzW4/pbuilderrc_7d8S --distribution forky --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/forky-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.cplohzW4/b1 --logfile b1/build.log libtime-format-perl_1.16-2.dsc'
-  SUDO_GID='111'
-  SUDO_HOME='/var/lib/jenkins'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.cplohzW4/pbuilderrc_r4Bv --distribution forky --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/forky-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.cplohzW4/b2 --logfile b2/build.log libtime-format-perl_1.16-2.dsc'
+  SUDO_GID=110
+  SUDO_HOME=/var/lib/jenkins
+  SUDO_UID=105
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos15-amd64 6.12.41+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.41-1 (2025-08-12) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.41+deb13-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.41-1 (2025-08-12) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug 10  2025 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/815918/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug 10 12:30 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3681468/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -187,7 +219,7 @@
 Get: 73 http://deb.debian.org/debian forky/main amd64 libdatetime-format-builder-perl all 0.8300-1 [63.8 kB]
 Get: 74 http://deb.debian.org/debian forky/main amd64 libdatetime-format-iso8601-perl all 0.17-1 [21.9 kB]
 Get: 75 http://deb.debian.org/debian forky/main amd64 libmodule-build-perl all 0.423400-3 [234 kB]
-Fetched 17.1 MB in 16s (1101 kB/s)
+Fetched 17.1 MB in 1s (18.8 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package tzdata.
 (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 ... 19897 files and directories currently installed.)
@@ -441,8 +473,8 @@
 Setting up tzdata (2025b-5) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Fri Oct  9 17:35:17 UTC 2026.
-Universal Time is now:  Fri Oct  9 17:35:17 UTC 2026.
+Local time is now:      Sat Sep  6 11:15:16 UTC 2025.
+Universal Time is now:  Sat Sep  6 11:15:16 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20240727.1) ...
@@ -510,7 +542,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libtime-format-perl-1.16/ && 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  > ../libtime-format-perl_1.16-2_source.changes
+I: user script /srv/workspace/pbuilder/3681468/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for forky
+I: user script /srv/workspace/pbuilder/3681468/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libtime-format-perl-1.16/ && 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  > ../libtime-format-perl_1.16-2_source.changes
 dpkg-buildpackage: info: source package libtime-format-perl
 dpkg-buildpackage: info: source version 1.16-2
 dpkg-buildpackage: info: source distribution unstable
@@ -703,46 +739,46 @@
 t/msec.t ......... 
 1..41
 ok 1 - use Time::Format;
-ok 2 - Bug test 1 (1: 2026/10/09 17:35:32.617    -- milli)
-ok 3 - Bug test 2 (1: 2026/10/09 17:35:32.618499 -- micro)
-ok 4 - Bug test 3 (2: 2026/10/09 17:35:32.798    -- milli)
-ok 5 - Bug test 4 (2: 2026/10/09 17:35:32.798819 -- micro)
-ok 6 - Bug test 5 (3: 2026/10/09 17:35:32.979    -- milli)
-ok 7 - Bug test 6 (3: 2026/10/09 17:35:32.979125 -- micro)
-ok 8 - Bug test 7 (4: 2026/10/09 17:35:33.159    -- milli)
-ok 9 - Bug test 8 (4: 2026/10/09 17:35:33.159514 -- micro)
-ok 10 - Bug test 9 (5: 2026/10/09 17:35:33.339    -- milli)
-ok 11 - Bug test 10 (5: 2026/10/09 17:35:33.339828 -- micro)
-ok 12 - Bug test 11 (6: 2026/10/09 17:35:33.520    -- milli)
-ok 13 - Bug test 12 (6: 2026/10/09 17:35:33.520148 -- micro)
-ok 14 - Bug test 13 (7: 2026/10/09 17:35:33.700    -- milli)
-ok 15 - Bug test 14 (7: 2026/10/09 17:35:33.700463 -- micro)
-ok 16 - Bug test 15 (8: 2026/10/09 17:35:33.880    -- milli)
-ok 17 - Bug test 16 (8: 2026/10/09 17:35:33.880774 -- micro)
-ok 18 - Bug test 17 (9: 2026/10/09 17:35:34.060    -- milli)
-ok 19 - Bug test 18 (9: 2026/10/09 17:35:34.061160 -- micro)
-ok 20 - Bug test 19 (10: 2026/10/09 17:35:34.241    -- milli)
-ok 21 - Bug test 20 (10: 2026/10/09 17:35:34.241457 -- micro)
-ok 22 - Bug test 21 (11: 2026/10/09 17:35:34.421    -- milli)
-ok 23 - Bug test 22 (11: 2026/10/09 17:35:34.421766 -- micro)
-ok 24 - Bug test 23 (12: 2026/10/09 17:35:34.601    -- milli)
-ok 25 - Bug test 24 (12: 2026/10/09 17:35:34.602066 -- micro)
-ok 26 - Bug test 25 (13: 2026/10/09 17:35:34.782    -- milli)
-ok 27 - Bug test 26 (13: 2026/10/09 17:35:34.782367 -- micro)
-ok 28 - Bug test 27 (14: 2026/10/09 17:35:34.962    -- milli)
-ok 29 - Bug test 28 (14: 2026/10/09 17:35:34.962654 -- micro)
-ok 30 - Bug test 29 (15: 2026/10/09 17:35:35.142    -- milli)
-ok 31 - Bug test 30 (15: 2026/10/09 17:35:35.143050 -- micro)
-ok 32 - Bug test 31 (16: 2026/10/09 17:35:35.323    -- milli)
-ok 33 - Bug test 32 (16: 2026/10/09 17:35:35.323386 -- micro)
-ok 34 - Bug test 33 (17: 2026/10/09 17:35:35.503    -- milli)
-ok 35 - Bug test 34 (17: 2026/10/09 17:35:35.503806 -- micro)
-ok 36 - Bug test 35 (18: 2026/10/09 17:35:35.684    -- milli)
-ok 37 - Bug test 36 (18: 2026/10/09 17:35:35.684153 -- micro)
-ok 38 - Bug test 37 (19: 2026/10/09 17:35:35.864    -- milli)
-ok 39 - Bug test 38 (19: 2026/10/09 17:35:35.864494 -- micro)
-ok 40 - Bug test 39 (20: 2026/10/09 17:35:36.044    -- milli)
-ok 41 - Bug test 40 (20: 2026/10/09 17:35:36.044905 -- micro)
+ok 2 - Bug test 1 (1: 2025/09/06 11:15:30.930    -- milli)
+ok 3 - Bug test 2 (1: 2025/09/06 11:15:30.931209 -- micro)
+ok 4 - Bug test 3 (2: 2025/09/06 11:15:31.111    -- milli)
+ok 5 - Bug test 4 (2: 2025/09/06 11:15:31.111622 -- micro)
+ok 6 - Bug test 5 (3: 2025/09/06 11:15:31.291    -- milli)
+ok 7 - Bug test 6 (3: 2025/09/06 11:15:31.291970 -- micro)
+ok 8 - Bug test 7 (4: 2025/09/06 11:15:31.472    -- milli)
+ok 9 - Bug test 8 (4: 2025/09/06 11:15:31.472287 -- micro)
+ok 10 - Bug test 9 (5: 2025/09/06 11:15:31.652    -- milli)
+ok 11 - Bug test 10 (5: 2025/09/06 11:15:31.652553 -- micro)
+ok 12 - Bug test 11 (6: 2025/09/06 11:15:31.832    -- milli)
+ok 13 - Bug test 12 (6: 2025/09/06 11:15:31.832864 -- micro)
+ok 14 - Bug test 13 (7: 2025/09/06 11:15:32.013    -- milli)
+ok 15 - Bug test 14 (7: 2025/09/06 11:15:32.013303 -- micro)
+ok 16 - Bug test 15 (8: 2025/09/06 11:15:32.193    -- milli)
+ok 17 - Bug test 16 (8: 2025/09/06 11:15:32.193584 -- micro)
+ok 18 - Bug test 17 (9: 2025/09/06 11:15:32.373    -- milli)
+ok 19 - Bug test 18 (9: 2025/09/06 11:15:32.373919 -- micro)
+ok 20 - Bug test 19 (10: 2025/09/06 11:15:32.554    -- milli)
+ok 21 - Bug test 20 (10: 2025/09/06 11:15:32.554244 -- micro)
+ok 22 - Bug test 21 (11: 2025/09/06 11:15:32.734    -- milli)
+ok 23 - Bug test 22 (11: 2025/09/06 11:15:32.734569 -- micro)
+ok 24 - Bug test 23 (12: 2025/09/06 11:15:32.914    -- milli)
+ok 25 - Bug test 24 (12: 2025/09/06 11:15:32.914910 -- micro)
+ok 26 - Bug test 25 (13: 2025/09/06 11:15:33.095    -- milli)
+ok 27 - Bug test 26 (13: 2025/09/06 11:15:33.095335 -- micro)
+ok 28 - Bug test 27 (14: 2025/09/06 11:15:33.275    -- milli)
+ok 29 - Bug test 28 (14: 2025/09/06 11:15:33.275674 -- micro)
+ok 30 - Bug test 29 (15: 2025/09/06 11:15:33.455    -- milli)
+ok 31 - Bug test 30 (15: 2025/09/06 11:15:33.455960 -- micro)
+ok 32 - Bug test 31 (16: 2025/09/06 11:15:33.636    -- milli)
+ok 33 - Bug test 32 (16: 2025/09/06 11:15:33.636286 -- micro)
+ok 34 - Bug test 33 (17: 2025/09/06 11:15:33.816    -- milli)
+ok 35 - Bug test 34 (17: 2025/09/06 11:15:33.816616 -- micro)
+ok 36 - Bug test 35 (18: 2025/09/06 11:15:33.996    -- milli)
+ok 37 - Bug test 36 (18: 2025/09/06 11:15:33.996937 -- micro)
+ok 38 - Bug test 37 (19: 2025/09/06 11:15:34.177    -- milli)
+ok 39 - Bug test 38 (19: 2025/09/06 11:15:34.177352 -- micro)
+ok 40 - Bug test 39 (20: 2025/09/06 11:15:34.357    -- milli)
+ok 41 - Bug test 40 (20: 2025/09/06 11:15:34.357685 -- micro)
 ok
 t/past.t ......... 
 1..4
@@ -1156,7 +1192,7 @@
 ok 102 - m test: Hour12: (cur)
 ok
 All tests successful.
-Files=26, Tests=533,  8 wallclock secs ( 0.15 usr  0.03 sys +  2.98 cusr  0.40 csys =  3.56 CPU)
+Files=26, Tests=533,  7 wallclock secs ( 0.12 usr  0.06 sys +  2.76 cusr  0.49 csys =  3.43 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/libtime-format-perl-1.16'
    create-stamp debian/debhelper-build-stamp
@@ -1187,12 +1223,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/3681468/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3681468/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/815918 and its subdirectories
-I: Current time: Fri Oct  9 05:35:40 -12 2026
-I: pbuilder-time-stamp: 1791567340
+I: removing directory /srv/workspace/pbuilder/3681468 and its subdirectories
+I: Current time: Sun Sep  7 01:15:41 +14 2025
+I: pbuilder-time-stamp: 1757157341