Diff of the two buildlogs:

--
--- b1/build.log	2023-05-06 00:12:42.757300660 +0000
+++ b2/build.log	2023-05-06 00:13:31.315172071 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Jun  6 18:34:08 -12 2024
-I: pbuilder-time-stamp: 1717742048
+I: Current time: Sat May  6 14:12:46 +14 2023
+I: pbuilder-time-stamp: 1683331966
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -17,7 +17,7 @@
 I: copying [./mailfront_2.12.orig.tar.gz.asc]
 I: copying [./mailfront_2.12-2.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sun May 15 10:34:28 2022 -12
+gpgv: Signature made Mon May 16 12:34:28 2022 +14
 gpgv:                using EDDSA key 658073613BFCC5C7E2E45D45DC518FC87F9716AA
 gpgv:                issuer "vagrant@reproducible-builds.org"
 gpgv: Can't check signature: No public key
@@ -29,52 +29,84 @@
 dpkg-source: info: applying debian-changes
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/22731/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/32119/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink16-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  6 14:12 /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/32119/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/32119/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='22731'
-  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=32119
   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.BERfpRNa/pbuilderrc_kpLp --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.BERfpRNa/b1 --logfile b1/build.log mailfront_2.12-2.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.BERfpRNa/pbuilderrc_jDrA --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.BERfpRNa/b2 --logfile b2/build.log --extrapackages usrmerge mailfront_2.12-2.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 codethink15-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  5 04:49 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/22731/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May  6 00:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/32119/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -163,7 +195,7 @@
 Get: 41 http://deb.debian.org/debian bookworm/main arm64 libncurses-dev arm64 6.4-2 [335 kB]
 Get: 42 http://deb.debian.org/debian bookworm/main arm64 libreadline-dev arm64 8.2-1.3 [151 kB]
 Get: 43 http://deb.debian.org/debian bookworm/main arm64 liblua5.1-0-dev arm64 5.1.5-9 [128 kB]
-Fetched 20.1 MB in 1s (20.2 MB/s)
+Fetched 20.1 MB in 0s (47.3 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package readline-common.
 (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.)
@@ -349,8 +381,17 @@
 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/mailfront-2.12/ && 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  > ../mailfront_2.12-2_source.changes
+I: user script /srv/workspace/pbuilder/32119/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/32119/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/mailfront-2.12/ && 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  > ../mailfront_2.12-2_source.changes
 dpkg-buildpackage: info: source package mailfront
 dpkg-buildpackage: info: source version 2.12-2
 dpkg-buildpackage: info: source distribution unstable
@@ -407,49 +448,44 @@
   echo 'base=`echo "$source" | sed -e s:\\\\.c$::`'; \
   echo exec `head -n 1 conf-cc` -I.  '-o ${base}.o -c $source ${1+"$@"}'; \
 ) >compile
-chmod 755 makelib
-chmod 755 compile
 ( echo '#!/bin/sh'; \
   echo 'source=$1; shift'; \
   echo 'base=`echo "$source" | sed -e s:\\\\.c$::`'; \
   echo exec `head -n 1 conf-ccso` -DSHARED -I. -L. '-o ${base}.so $source ${1+"$@"}'; \
 ) >makeso
+chmod 755 makelib
 head -n 1 conf-qmail | \
   sed -e 's/"/\\"/g' \
       -e 's/^/const char conf_qmail[] = "/' \
       -e 's/$/";/' >conf_qmail.c
-./compile mailfront.c
+chmod 755 compile
 ( echo '#!/bin/sh';\
   echo 'main="$1"; shift';\
   echo exec `head -n 1 conf-ld` -L. '-o "$main" "$main.o" ${1+"$@"}'; \
 ) >load
-./compile builtins.c
-./compile getprotoenv.c
-chmod 755 load
+chmod 755 makeso
 head -n 1 conf-modules | \
   sed -e 's/"/\\"/g' \
       -e 's/^/const char conf_modules[] = "/' \
       -e 's/$/";/' >conf_modules.c
-chmod 755 makeso
 ./compile responses.c
 ./compile session.c
-Checking for socket libraries: Checking for -ldl: ./compile imapfront-auth.c
+chmod 755 load
+./compile imapfront-auth.c
 ./compile pop3front-maildir.c
-no
 ./compile pop3front-auth.c
 echo \#define TESTCVM_UID $(id -u) > auto_testcvm.c
-echo \#define TESTCVM_GID $(id -g) >> auto_testcvm.c
-echo \#define TESTCVM_PWD \"$(pwd)\" >> auto_testcvm.c
-yes
 cat warn-auto.sh qmqpfront-echo.sh >qmqpfront-echo
+echo \#define TESTCVM_GID $(id -g) >> auto_testcvm.c
 cat warn-auto.sh smtpfront-echo.sh >smtpfront-echo
 chmod 755 qmqpfront-echo
+echo \#define TESTCVM_PWD \"$(pwd)\" >> auto_testcvm.c
+chmod 755 smtpfront-echo
 cat warn-auto.sh qmtpfront-qmail.sh >qmtpfront-qmail
 cat warn-auto.sh qmtpfront-echo.sh >qmtpfront-echo
 chmod 755 qmtpfront-qmail
-chmod 755 smtpfront-echo
-chmod 755 qmtpfront-echo
 cat warn-auto.sh qmqpfront-qmail.sh >qmqpfront-qmail
+chmod 755 qmtpfront-echo
 cat warn-auto.sh smtpfront-qmail.sh >smtpfront-qmail
 chmod 755 qmqpfront-qmail
 chmod 755 smtpfront-qmail
@@ -476,14 +512,19 @@
 ./makeso plugin-qmail-validate.c  -lbg 
 ./makeso protocol-qmqp.c qmtp-respond.c netstring.c -lbg 
 ./makeso plugin-spamassassin.c  -lbg 
+./compile mailfront.c
+./compile builtins.c
+./compile getprotoenv.c
 ./compile modules.c
-./load imapfront-auth timeout.o -lcvm-sasl -lcvm-v2client -lbg `cat socket.lib`
-./compile testcvm.c
+Checking for socket libraries: Checking for -ldl: ./compile testcvm.c
+no
 ./makelib pop3.a iobytes.o timeout.o pop3-capa.o pop3-mainloop.o pop3-response.o
+./load imapfront-auth timeout.o -lcvm-sasl -lcvm-v2client -lbg `cat socket.lib`
 ./load pop3front-maildir pop3.a -lbg -lcvm-sasl -lcvm-v2client 
 ./load pop3front-auth pop3.a -lcvm-sasl -lcvm-v2client -lbg `cat socket.lib`
-./load testcvm  -lcvm-module -lbg 
+yes
 ./load mailfront builtins.o getprotoenv.o iobytes.o modules.o responses.o session.o timeout.o -lbg -rdynamic `cat socket.lib` `cat dl.lib`
+./load testcvm  -lcvm-module -lbg 
 make[2]: Leaving directory '/build/mailfront-2.12'
 dh_auto_build -- lua
 	make -j8 "INSTALL=install --strip-program=true" lua
@@ -583,12 +624,14 @@
 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/32119/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/32119/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/22731 and its subdirectories
-I: Current time: Thu Jun  6 18:35:41 -12 2024
-I: pbuilder-time-stamp: 1717742141
+I: removing directory /srv/workspace/pbuilder/32119 and its subdirectories
+I: Current time: Sat May  6 14:13:30 +14 2023
+I: pbuilder-time-stamp: 1683332010