Diff of the two buildlogs:

--
--- b1/build.log	2023-04-26 08:42:42.092065670 +0000
+++ b2/build.log	2023-04-26 08:44:52.282294686 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Apr 25 20:37:49 -12 2023
-I: pbuilder-time-stamp: 1682498269
+I: Current time: Wed May 29 05:05:44 +14 2024
+I: pbuilder-time-stamp: 1716908744
 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 [./libtickit_0.4.3.orig.tar.gz]
 I: copying [./libtickit_0.4.3-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sat Feb  4 08:43:45 2023 -12
+gpgv: Signature made Sun Feb  5 10:43:45 2023 +14
 gpgv:                using RSA key 91BFBF4D6956BD5DF7B72D23DFE691AE331BA3DB
 gpgv:                issuer "jamessan@debian.org"
 gpgv: Can't check signature: No public key
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking libtickit_0.4.3-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/15915/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/21968/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink11-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 May 29 05:05 /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/21968/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/21968/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='15915'
-  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=21968
   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.0chHkBsf/pbuilderrc_EYdc --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.0chHkBsf/b1 --logfile b1/build.log libtickit_0.4.3-1.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.0chHkBsf/pbuilderrc_2R1E --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.0chHkBsf/b2 --logfile b2/build.log --extrapackages usrmerge libtickit_0.4.3-1.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 codethink14-arm64 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 24 22:27 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/15915/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 25 06:47 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/21968/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -154,7 +186,7 @@
 Get: 37 http://deb.debian.org/debian bookworm/main arm64 pkgconf-bin arm64 1.8.1-1 [28.9 kB]
 Get: 38 http://deb.debian.org/debian bookworm/main arm64 pkgconf arm64 1.8.1-1 [25.9 kB]
 Get: 39 http://deb.debian.org/debian bookworm/main arm64 pkg-config arm64 1.8.1-1 [13.7 kB]
-Fetched 19.0 MB in 1s (14.4 MB/s)
+Fetched 19.0 MB in 1s (17.8 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.)
@@ -324,8 +356,17 @@
 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/libtickit-0.4.3/ && 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  > ../libtickit_0.4.3-1_source.changes
+I: user script /srv/workspace/pbuilder/21968/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/21968/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/libtickit-0.4.3/ && 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  > ../libtickit_0.4.3-1_source.changes
 dpkg-buildpackage: info: source package libtickit
 dpkg-buildpackage: info: source version 0.4.3-1
 dpkg-buildpackage: info: source distribution unstable
@@ -750,7 +791,7 @@
 t/59tickit-tick.t ......... ok
 t/60tickit-setup.t ........ ok
 All tests successful.
-Files=44, Tests=1021,  5 wallclock secs ( 0.44 usr  0.11 sys +  0.89 cusr  0.61 csys =  2.05 CPU)
+Files=44, Tests=1021,  1 wallclock secs ( 0.34 usr  0.05 sys +  0.74 cusr  0.47 csys =  1.60 CPU)
 Result: PASS
 rm t/taplib-tickit.lo t/18term-builder.lo t/33renderbuffer-clip.lo t/19term-driver.lo t/13term-pen.lo t/35renderbuffer-mask.lo t/53tickit-later.lo t/40rootwindow.lo t/48window-refcount.lo t/03rect.lo t/32renderbuffer-char.lo t/15term-input.lo t/01utf8.lo t/31renderbuffer-line.lo t/12term-modes.lo t/59tickit-tick.lo t/11term-output-screen.lo t/55tickit-process.lo t/14term-resize.lo t/17term-buffer.lo t/43window-scrolling.lo t/41window.lo t/45window-input.lo t/42window-expose.lo t/52tickit-timer.lo t/44window-focus.lo t/04rectset.lo t/09debug.lo t/37renderbuffer-copy.lo t/50tickit.lo t/46window-float.lo t/20mockterm.lo t/02pen.lo t/47window-dragndrop.lo t/taplib.lo t/51tickit-io.lo t/05string.lo t/36renderbuffer-blit.lo t/60tickit-setup.lo t/54tickit-signal.lo t/16term-read.lo t/30renderbuffer-span.lo t/34renderbuffer-save.lo t/mockterm.lo t/11term-output-xterm.lo t/10term-write.lo t/08bindings.lo
 make[2]: Leaving directory '/build/libtickit-0.4.3'
@@ -789,7 +830,7 @@
   fi; \
 done < man/also
 libtool --mode=finish /build/libtickit-0.4.3/debian/tmp/usr/lib/aarch64-linux-gnu
-libtool: finish: PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/sbin" ldconfig -n /build/libtickit-0.4.3/debian/tmp/usr/lib/aarch64-linux-gnu
+libtool: finish: PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path:/sbin" ldconfig -n /build/libtickit-0.4.3/debian/tmp/usr/lib/aarch64-linux-gnu
 ----------------------------------------------------------------------
 Libraries have been installed in:
    /build/libtickit-0.4.3/debian/tmp/usr/lib/aarch64-linux-gnu
@@ -833,9 +874,9 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'libtickit3-dbgsym' in '../libtickit3-dbgsym_0.4.3-1_arm64.deb'.
-dpkg-deb: building package 'libtickit-dev' in '../libtickit-dev_0.4.3-1_arm64.deb'.
 dpkg-deb: building package 'libtickit3' in '../libtickit3_0.4.3-1_arm64.deb'.
+dpkg-deb: building package 'libtickit-dev' in '../libtickit-dev_0.4.3-1_arm64.deb'.
+dpkg-deb: building package 'libtickit3-dbgsym' in '../libtickit3-dbgsym_0.4.3-1_arm64.deb'.
  dpkg-genbuildinfo --build=binary -O../libtickit_0.4.3-1_arm64.buildinfo
  dpkg-genchanges --build=binary -O../libtickit_0.4.3-1_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -843,12 +884,14 @@
 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/21968/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/21968/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/15915 and its subdirectories
-I: Current time: Tue Apr 25 20:42:40 -12 2023
-I: pbuilder-time-stamp: 1682498560
+I: removing directory /srv/workspace/pbuilder/21968 and its subdirectories
+I: Current time: Wed May 29 05:07:50 +14 2024
+I: pbuilder-time-stamp: 1716908870