Diff of the two buildlogs:

--
--- b1/build.log	2023-04-13 23:39:22.876827468 +0000
+++ b2/build.log	2023-04-13 23:41:15.867814708 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Apr 13 11:37:34 -12 2023
-I: pbuilder-time-stamp: 1681429054
+I: Current time: Thu May 16 20:02:27 +14 2024
+I: pbuilder-time-stamp: 1715839347
 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 [./tcptrace_6.6.7.orig.tar.gz]
 I: copying [./tcptrace_6.6.7-6.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Thu May 23 14:51:18 2019 -12
+gpgv: Signature made Fri May 24 16:51:18 2019 +14
 gpgv:                using RSA key EB9C5A179AF62C3093CFECF257AF3E067DB25833
 gpgv:                issuer "noahm@debian.org"
 gpgv: Can't check signature: No public key
@@ -32,11 +32,20 @@
 dpkg-source: info: applying bug624296-url-decoding
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/22130/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/11120/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
+lrwxrwxrwx 1 root root 4 Jan  6  2023 /bin/sh -> dash
+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/11120/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/11120/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'
+  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'
@@ -46,38 +55,38 @@
   IFS=' 	
   '
   LANG='C'
-  LANGUAGE='en_US:en'
+  LANGUAGE='nl_BE:nl'
   LC_ALL='C'
   MAIL='/var/mail/root'
   OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
+  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'
-  PPID='22130'
+  PPID='11120'
   PS1='# '
   PS2='> '
   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.BHJtmBeA/pbuilderrc_qW0j --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.BHJtmBeA/b1 --logfile b1/build.log tcptrace_6.6.7-6.dsc'
+  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.BHJtmBeA/pbuilderrc_6ySy --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.BHJtmBeA/b2 --logfile b2/build.log --extrapackages usrmerge tcptrace_6.6.7-6.dsc'
   SUDO_GID='117'
   SUDO_UID='110'
   SUDO_USER='jenkins'
   TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
+  TZ='/usr/share/zoneinfo/Etc/GMT-14'
   USER='root'
   USERNAME='root'
   _='/usr/bin/systemd-run'
   http_proxy='http://192.168.101.16:3128'
 I: uname -a
-  Linux codethink14-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 Apr 12 22:50 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/22130/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 16 07:13 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/11120/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -158,7 +167,7 @@
 Get: 39 http://deb.debian.org/debian bookworm/main arm64 libpcap0.8 arm64 1.10.3-1 [148 kB]
 Get: 40 http://deb.debian.org/debian bookworm/main arm64 libpcap0.8-dev arm64 1.10.3-1 [271 kB]
 Get: 41 http://deb.debian.org/debian bookworm/main arm64 libpcap-dev arm64 1.10.3-1 [28.2 kB]
-Fetched 19.4 MB in 1s (28.9 MB/s)
+Fetched 19.4 MB in 0s (39.2 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sgml-base.
 (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.)
@@ -340,10 +349,15 @@
 Reading package lists...
 Building dependency tree...
 Reading state information...
+usrmerge is already the newest version (35).
 fakeroot is already the newest version (1.31-1.2).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/tcptrace-6.6.7/ && 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  > ../tcptrace_6.6.7-6_source.changes
+I: user script /srv/workspace/pbuilder/11120/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/11120/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/tcptrace-6.6.7/ && 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  > ../tcptrace_6.6.7-6_source.changes
 dpkg-buildpackage: info: source package tcptrace
 dpkg-buildpackage: info: source version 6.6.7-6
 dpkg-buildpackage: info: source distribution unstable
@@ -827,8 +841,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'tcptrace' in '../tcptrace_6.6.7-6_arm64.deb'.
 dpkg-deb: building package 'tcptrace-dbgsym' in '../tcptrace-dbgsym_6.6.7-6_arm64.deb'.
+dpkg-deb: building package 'tcptrace' in '../tcptrace_6.6.7-6_arm64.deb'.
  dpkg-genbuildinfo --build=binary -O../tcptrace_6.6.7-6_arm64.buildinfo
  dpkg-genchanges --build=binary -O../tcptrace_6.6.7-6_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -836,12 +850,14 @@
 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/11120/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/11120/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/22130 and its subdirectories
-I: Current time: Thu Apr 13 11:39:21 -12 2023
-I: pbuilder-time-stamp: 1681429161
+I: removing directory /srv/workspace/pbuilder/11120 and its subdirectories
+I: Current time: Thu May 16 20:04:14 +14 2024
+I: pbuilder-time-stamp: 1715839454