Diff of the two buildlogs:

--
--- b1/build.log	2024-06-14 07:06:17.532409577 +0000
+++ b2/build.log	2024-06-14 07:09:18.732698116 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Jun 13 19:05:09 -12 2024
-I: pbuilder-time-stamp: 1718348709
+I: Current time: Fri Jun 14 21:06:26 +14 2024
+I: pbuilder-time-stamp: 1718348786
 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 0001-Perl-5.38-compatibility.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/6857/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/21148/tmp/hooks/D01_modify_environment starting
+debug: Running on virt32a.
+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 Jun 14 07:06 /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/21148/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/21148/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="21" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.21(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='d388fb4dad1f4993940068371b408dcd'
-  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='6857'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=ac55553f833c47288e6de18850e689ca
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=21148
   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.ZWzNyKsp/pbuilderrc_aAVf --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.ZWzNyKsp/b1 --logfile b1/build.log libapp-stacktrace-perl_0.09-5.dsc'
-  SUDO_GID='110'
-  SUDO_UID='103'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.ZWzNyKsp/pbuilderrc_xIS8 --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.ZWzNyKsp/b2 --logfile b2/build.log libapp-stacktrace-perl_0.09-5.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux virt64z 6.1.0-21-arm64 #1 SMP Debian 6.1.90-1 (2024-05-03) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-armmp-lpae #1 SMP Debian 6.1.90-1 (2024-05-03) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Jun  5 22:35 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/6857/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/21148/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -180,7 +212,7 @@
 Get: 62 http://deb.debian.org/debian unstable/main armhf gdb armhf 13.2-1+b2 [3378 kB]
 Get: 63 http://deb.debian.org/debian unstable/main armhf libperl-dev armhf 5.38.2-5 [974 kB]
 Get: 64 http://deb.debian.org/debian unstable/main armhf perl-debug armhf 5.38.2-5 [12.3 MB]
-Fetched 43.8 MB in 3s (15.0 MB/s)
+Fetched 43.8 MB in 1s (49.4 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 ... 19460 files and directories currently installed.)
@@ -406,8 +438,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Fri Jun 14 07:05:53 UTC 2024.
-Universal Time is now:  Fri Jun 14 07:05:53 UTC 2024.
+Local time is now:      Fri Jun 14 07:07:08 UTC 2024.
+Universal Time is now:  Fri Jun 14 07:07:08 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -463,7 +495,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libapp-stacktrace-perl-0.09/ && 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  > ../libapp-stacktrace-perl_0.09-5_source.changes
+I: user script /srv/workspace/pbuilder/21148/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/21148/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libapp-stacktrace-perl-0.09/ && 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  > ../libapp-stacktrace-perl_0.09-5_source.changes
 dpkg-buildpackage: info: source package libapp-stacktrace-perl
 dpkg-buildpackage: info: source version 0.09-5
 dpkg-buildpackage: info: source distribution unstable
@@ -485,15 +521,15 @@
 Writing Makefile for App::Stacktrace
 Writing MYMETA.yml and MYMETA.json
    dh_auto_build
-	make -j3
+	make -j4
 make[1]: Entering directory '/build/reproducible-path/libapp-stacktrace-perl-0.09'
 Running Mkbootstrap for Stacktrace ()
 "/usr/bin/perl" "/usr/share/perl/5.38/ExtUtils/xsubpp"  -typemap '/usr/share/perl/5.38/ExtUtils/typemap'  Stacktrace.xs > Stacktrace.xsc
 chmod 644 "Stacktrace.bs"
-cp lib/App/Stacktrace/perl_backtrace_symbols.txt blib/lib/App/Stacktrace/perl_backtrace_symbols.txt
+"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Stacktrace.bs blib/arch/auto/App/Stacktrace/Stacktrace.bs 644
 cp lib/App/Stacktrace.pm blib/lib/App/Stacktrace.pm
+cp lib/App/Stacktrace/perl_backtrace_symbols.txt blib/lib/App/Stacktrace/perl_backtrace_symbols.txt
 cp lib/App/Stacktrace/perl_backtrace_raw.txt blib/lib/App/Stacktrace/perl_backtrace_raw.txt
-"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Stacktrace.bs blib/arch/auto/App/Stacktrace/Stacktrace.bs 644
 Please specify prototyping behavior for Stacktrace.xs (see perlxs manual)
 mv Stacktrace.xsc Stacktrace.c
 arm-linux-gnueabihf-gcc -c   -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libapp-stacktrace-perl-0.09=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"0.09\" -DXS_VERSION=\"0.09\" -fPIC "-I/usr/lib/arm-linux-gnueabihf/perl/5.38/CORE"   Stacktrace.c
@@ -796,7 +832,7 @@
 Manifying 1 pod document
 make[1]: Leaving directory '/build/reproducible-path/libapp-stacktrace-perl-0.09'
    dh_auto_test
-	make -j3 test TEST_VERBOSE=1
+	make -j4 test TEST_VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/libapp-stacktrace-perl-0.09'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Stacktrace.bs blib/arch/auto/App/Stacktrace/Stacktrace.bs 644
 PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(1, 'blib/lib', 'blib/arch')" t/*.t
@@ -2124,7 +2160,7 @@
 t/release-pod-syntax.t .... skipped: these tests are for release candidate testing
 # [Thread debugging using libthread_db enabled]
 # Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
-# 0xf77429c4 in ?? () from /lib/arm-linux-gnueabihf/libc.so.6
+# 0xb6dff9c4 in ?? () from /lib/arm-linux-gnueabihf/libc.so.6
 # t/unthreaded.t:101
 # t/unthreaded.t:106
 # t/unthreaded.t:106
@@ -2136,7 +2172,7 @@
 # t/unthreaded.t:106
 # t/unthreaded.t:106
 # t/unthreaded.t:106
-# [Inferior 1 (process 8564) detached]
+# [Inferior 1 (process 22457) detached]
 t/unthreaded.t ............ 
 1..5
 ok 1
@@ -2144,17 +2180,17 @@
 ok 3 - exit(0)
 ok 4 - No signals
 ok 5 - No core dump
-# Alive top 1718348763: 1 middle: 1
-# Alive top 1718348765: 1 middle: 0
+# Alive top 1718348942: 1 middle: 1
+# Alive top 1718348944: 1 middle: 0
 ok
 All tests successful.
-Files=4, Tests=6,  2 wallclock secs ( 0.06 usr  0.00 sys +  1.62 cusr  0.30 csys =  1.98 CPU)
+Files=4, Tests=6,  3 wallclock secs ( 0.07 usr  0.02 sys +  2.31 cusr  0.42 csys =  2.82 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/libapp-stacktrace-perl-0.09'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/perl-stacktrace/
-	make -j3 install DESTDIR=/build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace AM_UPDATE_INFO_DIR=no PREFIX=/usr
+	make -j4 install DESTDIR=/build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/reproducible-path/libapp-stacktrace-perl-0.09'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Stacktrace.bs blib/arch/auto/App/Stacktrace/Stacktrace.bs 644
 Manifying 1 pod document
@@ -2162,8 +2198,8 @@
 Files found in blib/arch: installing files in blib/lib into architecture dependent library tree
 Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/lib/arm-linux-gnueabihf/perl5/5.38/auto/App/Stacktrace/Stacktrace.so
 Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/lib/arm-linux-gnueabihf/perl5/5.38/App/Stacktrace.pm
-Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/lib/arm-linux-gnueabihf/perl5/5.38/App/Stacktrace/perl_backtrace_raw.txt
 Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/lib/arm-linux-gnueabihf/perl5/5.38/App/Stacktrace/perl_backtrace_symbols.txt
+Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/lib/arm-linux-gnueabihf/perl5/5.38/App/Stacktrace/perl_backtrace_raw.txt
 Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/share/man/man1/perl-stacktrace.1p
 Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/share/man/man3/App::Stacktrace.3pm
 Installing /build/reproducible-path/libapp-stacktrace-perl-0.09/debian/perl-stacktrace/usr/bin/perl-stacktrace
@@ -2190,8 +2226,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'perl-stacktrace-dbgsym' in '../perl-stacktrace-dbgsym_0.09-5_armhf.deb'.
 dpkg-deb: building package 'perl-stacktrace' in '../perl-stacktrace_0.09-5_armhf.deb'.
+dpkg-deb: building package 'perl-stacktrace-dbgsym' in '../perl-stacktrace-dbgsym_0.09-5_armhf.deb'.
  dpkg-genbuildinfo --build=binary -O../libapp-stacktrace-perl_0.09-5_armhf.buildinfo
  dpkg-genchanges --build=binary -O../libapp-stacktrace-perl_0.09-5_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -2199,12 +2235,14 @@
 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/21148/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/21148/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/6857 and its subdirectories
-I: Current time: Thu Jun 13 19:06:12 -12 2024
-I: pbuilder-time-stamp: 1718348772
+I: removing directory /srv/workspace/pbuilder/21148 and its subdirectories
+I: Current time: Fri Jun 14 21:09:13 +14 2024
+I: pbuilder-time-stamp: 1718348953