Diff of the two buildlogs:

--
--- b1/build.log	2025-01-01 20:13:49.400530460 +0000
+++ b2/build.log	2025-01-01 20:15:04.465100305 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Feb  3 14:35:28 -12 2026
-I: pbuilder-time-stamp: 1770172528
+I: Current time: Thu Jan  2 10:13:53 +14 2025
+I: pbuilder-time-stamp: 1735762433
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -28,52 +28,84 @@
 dpkg-source: info: applying 0006-fix-some-spelling-errors.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2491124/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/291313/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-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 Jan  1 20:14 /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/291313/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/291313/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='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]="37" [3]="1" [4]="release" [5]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='e907cd6861904c088aae134bd3c05890'
-  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='2491124'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=35a7b99f1007459a9714ee6049b0a6ea
+  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=291313
   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.OmWwLGkO/pbuilderrc_qcub --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.OmWwLGkO/b1 --logfile b1/build.log ircii_20240918-1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.OmWwLGkO/pbuilderrc_Rnh1 --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.OmWwLGkO/b2 --logfile b2/build.log ircii_20240918-1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink01-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2491124/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/291313/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -146,7 +178,7 @@
 Get: 31 http://deb.debian.org/debian unstable/main arm64 libncurses6 arm64 6.5-2+b1 [96.1 kB]
 Get: 32 http://deb.debian.org/debian unstable/main arm64 libncurses-dev arm64 6.5-2+b1 [338 kB]
 Get: 33 http://deb.debian.org/debian unstable/main arm64 libssl-dev arm64 3.3.2-2 [3185 kB]
-Fetched 23.5 MB in 0s (122 MB/s)
+Fetched 23.5 MB in 0s (133 MB/s)
 Preconfiguring packages ...
 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 ... 19975 files and directories currently installed.)
@@ -293,7 +325,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/ircii-20240918/ && 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  > ../ircii_20240918-1_source.changes
+I: user script /srv/workspace/pbuilder/291313/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/291313/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/ircii-20240918/ && 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  > ../ircii_20240918-1_source.changes
 dpkg-buildpackage: info: source package ircii
 dpkg-buildpackage: info: source version 20240918-1
 dpkg-buildpackage: info: source distribution unstable
@@ -461,11 +497,11 @@
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -DDEFAULT_HELP_PATH=\"/usr/share/ircII//help\" -c /build/reproducible-path/ircii-20240918/source/help.c
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/history.c
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/hold.c
+gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/hook.c
 /build/reproducible-path/ircii-20240918/source/dcc.c: In function 'dcc_message_transmit':
 /build/reproducible-path/ircii-20240918/source/dcc.c:1510:23: warning: ignoring return value of 'writev' declared with attribute 'warn_unused_result' [-Wunused-result]
  1510 |                 (void)writev(Client->write, iov, 2);
       |                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/hook.c
 /build/reproducible-path/ircii-20240918/source/exec.c: In function 'start_process':
 /build/reproducible-path/ircii-20240918/source/exec.c:783:23: warning: ignoring return value of 'write' declared with attribute 'warn_unused_result' [-Wunused-result]
   783 |                 (void)write(1, buffer, my_strlen(buffer));
@@ -530,8 +566,6 @@
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/window.c
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/ircio.c
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/ircflush.c
-gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/wserv.c
-gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/wterm.c
 /build/reproducible-path/ircii-20240918/source/ircflush.c: In function 'main':
 /build/reproducible-path/ircii-20240918/source/ircflush.c:136:17: warning: ignoring return value of 'setuid' declared with attribute 'warn_unused_result' [-Wunused-result]
   136 |                 setuid(getuid());
@@ -539,9 +573,11 @@
 /build/reproducible-path/ircii-20240918/source/ircflush.c:137:17: warning: ignoring return value of 'setgid' declared with attribute 'warn_unused_result' [-Wunused-result]
   137 |                 setgid(getgid());
       |                 ^~~~~~~~~~~~~~~~
+gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/wserv.c
+gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -DHAVE_CONFIG_H -c /build/reproducible-path/ircii-20240918/source/wterm.c
+gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -DHAVE_CONFIG_H -o ircflush ircflush.o ircsig.o -ltermcap  -lssl -lcrypto -lcrypt
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -DHAVE_CONFIG_H  -o ircio ircio.o newio.o ircsig.o -ltermcap  -lssl -lcrypto -lcrypt
 gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -DHAVE_CONFIG_H -o wserv wserv.o wterm.o ircsig.o -ltermcap  -lssl -lcrypto -lcrypt
-gcc -iquote . -iquote /build/reproducible-path/ircii-20240918/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -DHAVE_CONFIG_H -o ircflush ircflush.o ircsig.o -ltermcap  -lssl -lcrypto -lcrypt
 gcc -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/ircii-20240918=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -DHAVE_CONFIG_H -o irc alias.o crypt.o ctcp.o dcc.o debug.o edit.o exec.o flood.o funny.o help.o history.o hold.o hook.o icb.o if.o ignore.o input.o irc.o ircaux.o ircsig.o keys.o lastlog.o list.o log.o mail.o menu.o names.o newio.o notice.o notify.o numbers.o output.o parse.o queue.o reg.o scandir.o screen.o server.o sl.o sl_irc.o signals.o ssl.o status.o strsep.o strcasestr.o term.o translat.o vars.o whois.o window.o -ltermcap  -lssl -lcrypto -lcrypt
 make[2]: Leaving directory '/build/reproducible-path/ircii-20240918'
 make[1]: Leaving directory '/build/reproducible-path/ircii-20240918'
@@ -597,12 +633,14 @@
 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/291313/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/291313/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/2491124 and its subdirectories
-I: Current time: Tue Feb  3 14:36:48 -12 2026
-I: pbuilder-time-stamp: 1770172608
+I: removing directory /srv/workspace/pbuilder/291313 and its subdirectories
+I: Current time: Thu Jan  2 10:15:03 +14 2025
+I: pbuilder-time-stamp: 1735762503