Diff of the two buildlogs:

--
--- b1/build.log	2023-05-12 11:46:14.278839136 +0000
+++ b2/build.log	2023-05-12 11:47:10.868357960 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Jun 13 06:08:00 -12 2024
-I: pbuilder-time-stamp: 1718302080
+I: Current time: Sat May 13 01:46:17 +14 2023
+I: pbuilder-time-stamp: 1683891977
 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 [./libnet-proxy-perl_0.12.orig.tar.gz]
 I: copying [./libnet-proxy-perl_0.12-6.2.diff.gz]
 I: Extracting source
-gpgv: Signature made Sun Dec 26 07:26:04 2021 -12
+gpgv: Signature made Mon Dec 27 09:26:04 2021 +14
 gpgv:                using RSA key D1E1316E93A760A8104D85FABB3A68018649AA06
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./libnet-proxy-perl_0.12-6.2.dsc: no acceptable signature found
@@ -25,52 +25,84 @@
 dpkg-source: info: applying libnet-proxy-perl_0.12-6.2.diff.gz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3860/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/25017/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 May 13 01:46 /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/25017/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/25017/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='3860'
-  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=25017
   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.YWM1InNI/pbuilderrc_p3zF --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.YWM1InNI/b1 --logfile b1/build.log libnet-proxy-perl_0.12-6.2.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.YWM1InNI/pbuilderrc_y7U7 --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.YWM1InNI/b2 --logfile b2/build.log --extrapackages usrmerge libnet-proxy-perl_0.12-6.2.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 codethink9-arm64 4.15.0-210-generic #221-Ubuntu SMP Tue Apr 18 08:32:48 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-210-generic #221-Ubuntu SMP Tue Apr 18 08:32:48 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun 13 04:49 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3860/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 11 00:25 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/25017/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -139,7 +171,7 @@
 Get: 29 http://deb.debian.org/debian bookworm/main arm64 po-debconf all 1.0.21+nmu1 [248 kB]
 Get: 30 http://deb.debian.org/debian bookworm/main arm64 debhelper all 13.11.4 [942 kB]
 Get: 31 http://deb.debian.org/debian bookworm/main arm64 libmodule-build-perl all 0.423200-1 [253 kB]
-Fetched 18.6 MB in 5s (3668 kB/s)
+Fetched 18.6 MB in 2s (9892 kB/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.)
@@ -282,10 +314,15 @@
 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/libnet-proxy-perl-0.12/ && 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  > ../libnet-proxy-perl_0.12-6.2_source.changes
+I: user script /srv/workspace/pbuilder/25017/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/25017/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/libnet-proxy-perl-0.12/ && 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  > ../libnet-proxy-perl_0.12-6.2_source.changes
 dpkg-buildpackage: info: source package libnet-proxy-perl
 dpkg-buildpackage: info: source version 0.12-6.2
 dpkg-buildpackage: info: source distribution unstable
@@ -330,51 +367,51 @@
 t/20dummy.t ............. ok
 t/21connect.t ........... skipped: LWP::UserAgent not available
 t/22dual.t .............. ok
-# Random seed 1649122041
-# ports: 55503 50905
+# Random seed 372300101
+# ports: 33511 50733
 t/30tcp_tcp.t ........... ok
-# Random seed 1630676930
-# ports: 43313 54433 44455
+# Random seed 1789061247
+# ports: 46761 38069 53891
 t/31tcp_tcp_multi.t ..... ok
-# Random seed 988048295
+# Random seed 1589645251
 t/32tcp_connect.t ....... ok
-# Random seed 1191854670
-# ports: 45507 39567 34621
+# Random seed 1313508593
+# ports: 39211 43285 60593
 t/33dual.t .............. ok
-# Random seed 1665450582
-# ports: 56727 39811
+# Random seed 857327101
+# ports: 42911 56963
 t/34hook_in.t ........... ok
-# Random seed 258064300
-# ports: 56461 48845
+# Random seed 258509618
+# ports: 40347 60005
 t/34hook_out.t .......... ok
-# Random seed 449454316
-# ports: 51205 46215 55217
+# Random seed 443449609
+# ports: 50813 52193 51747
 t/35hook_dual.t ......... ok
 t/35signal.t ............ ok
-# Random seed 1600290212
-# ports: 52523 41371
+# Random seed 949425779
+# ports: 51279 47837
 t/36ctssl_tcp.t ......... ok
-# Random seed 1558662669
-# ports: 40993 57033
+# Random seed 1199203470
+# ports: 37797 49147
 t/36ssl_tcp.t ........... ok
-# Random seed 1651752557
-# ports: 60463 46127
+# Random seed 407727013
+# ports: 38575 56901
 t/36tcp_ctssl.t ......... ok
-# Random seed 1887374495
-# ports: 54045 58751
+# Random seed 330140024
+# ports: 60807 37425
 t/36tcp_ssl.t ........... ok
-# Random seed 954545682
+# Random seed 1327954907
 t/37connectssl_tcp.t .... ok
-# ports: 56599 54999
+# ports: 50291 48041
 connect() failed with error 'Connection refused'
 t/40tcp_fail.t .......... ok
-# ports: 38117 60319
+# ports: 37025 36331
 t/41listen_fail.t ....... ok
 t/90compile.t ........... ok
 t/pod-coverage.t ........ skipped: Test::Pod::Coverage 1.04 required for testing POD coverage
 t/pod.t ................. skipped: Test::Pod 1.14 required for testing POD
 All tests successful.
-Files=28, Tests=177, 21 wallclock secs ( 0.28 usr  0.07 sys +  7.95 cusr  1.03 csys =  9.33 CPU)
+Files=28, Tests=173, 18 wallclock secs ( 0.17 usr  0.08 sys +  5.78 cusr  0.71 csys =  6.74 CPU)
 Result: PASS
 touch build-stamp
  fakeroot debian/rules binary
@@ -436,12 +473,14 @@
 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/25017/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/25017/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/3860 and its subdirectories
-I: Current time: Thu Jun 13 06:09:13 -12 2024
-I: pbuilder-time-stamp: 1718302153
+I: removing directory /srv/workspace/pbuilder/25017 and its subdirectories
+I: Current time: Sat May 13 01:47:10 +14 2023
+I: pbuilder-time-stamp: 1683892030