Diff of the two buildlogs:

--
--- b1/build.log	2024-01-07 19:40:53.904150424 +0000
+++ b2/build.log	2024-01-07 19:41:24.322909118 +0000
@@ -1,7 +1,6 @@
-W: cgroups are not available on the host, not using them.
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Jan  7 07:40:36 -12 2024
-I: pbuilder-time-stamp: 1704656436
+I: Current time: Sun Feb  9 16:03:56 +14 2025
+I: pbuilder-time-stamp: 1739066636
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -26,48 +25,81 @@
 dpkg-source: info: unpacking libxml-filter-sort-perl_1.01-4.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2503184/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3621574/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink03-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 Feb  9 02:04 /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/3621574/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3621574/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='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/reproducible-path
+  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=12 '
-  DISTRIBUTION='bookworm'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  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='2503184'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=b4a3783c0b514ea8b517f8a6f5ee880b
+  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=3621574
   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.3uSSwtc5/pbuilderrc_KrpO --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.3uSSwtc5/b1 --logfile b1/build.log libxml-filter-sort-perl_1.01-4.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/sbin/chroot'
-  http_proxy='http://192.168.101.104:3128'
+  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.3uSSwtc5/pbuilderrc_C91V --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.3uSSwtc5/b2 --logfile b2/build.log libxml-filter-sort-perl_1.01-4.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.104:3128
 I: uname -a
-  Linux codethink04-arm64 6.1.0-17-cloud-arm64 #1 SMP Debian 6.1.69-1 (2023-12-30) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-17-cloud-arm64 #1 SMP Debian 6.1.69-1 (2023-12-30) aarch64 GNU/Linux
 I: ls -l /bin
   total 7104
   -rwxr-xr-x 1 root root 1346480 Apr 23  2023 bash
@@ -125,15 +157,15 @@
   -rwxr-xr-x 1 root root   68456 Sep 20  2022 readlink
   -rwxr-xr-x 1 root root   68592 Sep 20  2022 rm
   -rwxr-xr-x 1 root root   68480 Sep 20  2022 rmdir
-  -rwxr-xr-x 1 root root   68392 Jul 28 23:46 run-parts
+  -rwxr-xr-x 1 root root   68392 Jul 28  2023 run-parts
   -rwxr-xr-x 1 root root  134536 Jan  5  2023 sed
-  lrwxrwxrwx 1 root root       4 Jan  5  2023 sh -> dash
+  lrwxrwxrwx 1 root root       9 Feb  9 02:04 sh -> /bin/bash
   -rwxr-xr-x 1 root root   68432 Sep 20  2022 sleep
   -rwxr-xr-x 1 root root  134088 Sep 20  2022 stty
   -rwsr-xr-x 1 root root  133312 Mar 23  2023 su
   -rwxr-xr-x 1 root root   68448 Sep 20  2022 sync
   -rwxr-xr-x 1 root root  539896 Apr  6  2023 tar
-  -rwxr-xr-x 1 root root   67904 Jul 28 23:46 tempfile
+  -rwxr-xr-x 1 root root   67904 Jul 28  2023 tempfile
   -rwxr-xr-x 1 root root  134160 Sep 20  2022 touch
   -rwxr-xr-x 1 root root   68384 Sep 20  2022 true
   -rwxr-xr-x 1 root root   67664 Mar 23  2023 ulockmgr_server
@@ -153,7 +185,7 @@
   -rwxr-xr-x 1 root root    2206 Apr 10  2022 zless
   -rwxr-xr-x 1 root root    1842 Apr 10  2022 zmore
   -rwxr-xr-x 1 root root    4577 Apr 10  2022 znew
-I: user script /srv/workspace/pbuilder/2503184/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/3621574/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -232,7 +264,7 @@
 Get: 35 http://deb.debian.org/debian bookworm/main arm64 libxml-filter-buffertext-perl all 1.01-7 [7136 B]
 Get: 36 http://deb.debian.org/debian bookworm/main arm64 libxml-sax-writer-perl all 0.57-2 [23.1 kB]
 Get: 37 http://deb.debian.org/debian bookworm/main arm64 libxml-sax-machines-perl all 0.46-2 [74.9 kB]
-Fetched 18.6 MB in 0s (88.3 MB/s)
+Fetched 18.6 MB in 0s (109 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 ... 18171 files and directories currently installed.)
@@ -400,7 +432,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libxml-filter-sort-perl-1.01/ && 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  > ../libxml-filter-sort-perl_1.01-4_source.changes
+I: user script /srv/workspace/pbuilder/3621574/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for bookworm
+I: user script /srv/workspace/pbuilder/3621574/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libxml-filter-sort-perl-1.01/ && 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  > ../libxml-filter-sort-perl_1.01-4_source.changes
 dpkg-buildpackage: info: source package libxml-filter-sort-perl
 dpkg-buildpackage: info: source version 1.01-4
 dpkg-buildpackage: info: source distribution unstable
@@ -416,8 +452,8 @@
    dh_autoreconf
    dh_auto_configure
 	/usr/bin/perl -I. Makefile.PL INSTALLDIRS=vendor "OPTIMIZE=-g -O2 -ffile-prefix-map=/build/reproducible-path/libxml-filter-sort-perl-1.01=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2" "LD=aarch64-linux-gnu-gcc -g -O2 -ffile-prefix-map=/build/reproducible-path/libxml-filter-sort-perl-1.01=. -fstack-protector-strong -Wformat -Werror=format-security -Wl,-z,relro"
-Undefined requirement for XML::SAX treated as '0' at /usr/share/perl/5.36/ExtUtils/MakeMaker.pm line 474.
 Undefined requirement for XML::SAX::Writer treated as '0' at /usr/share/perl/5.36/ExtUtils/MakeMaker.pm line 474.
+Undefined requirement for XML::SAX treated as '0' at /usr/share/perl/5.36/ExtUtils/MakeMaker.pm line 474.
 Checking if your kit is complete...
 Looks good
 Generating a Unix-style Makefile
@@ -426,10 +462,10 @@
    dh_auto_build
 	make -j12
 make[1]: Entering directory '/build/reproducible-path/libxml-filter-sort-perl-1.01'
-cp lib/XML/Filter/Sort/DiskBuffer.pm blib/lib/XML/Filter/Sort/DiskBuffer.pm
 cp lib/XML/Filter/Sort/BufferMgr.pm blib/lib/XML/Filter/Sort/BufferMgr.pm
-cp lib/XML/Filter/Sort.pm blib/lib/XML/Filter/Sort.pm
 cp lib/XML/Filter/Sort/DiskBufferMgr.pm blib/lib/XML/Filter/Sort/DiskBufferMgr.pm
+cp lib/XML/Filter/Sort/DiskBuffer.pm blib/lib/XML/Filter/Sort/DiskBuffer.pm
+cp lib/XML/Filter/Sort.pm blib/lib/XML/Filter/Sort.pm
 cp lib/XML/Filter/Sort/Buffer.pm blib/lib/XML/Filter/Sort/Buffer.pm
 cp bin/xmlsort blib/script/xmlsort
 "/usr/bin/perl" -MExtUtils::MY -e 'MY->fixin(shift)' -- blib/script/xmlsort
@@ -565,8 +601,8 @@
 ok 17 - Successfully created a XML::Filter::Sort::DiskBufferMgr object
 ok 18 - Successfully created a slave buffer manager
 ok 19 - Slave is a XML::Filter::Sort::DiskBufferMgr too
-ok 20 - Temp directory was created (t/temp/oOtPIVxReE)
-ok 21 - Temp file was created (t/temp/oOtPIVxReE/0)
+ok 20 - Temp directory was created (t/temp/msnm_PXocc)
+ok 21 - Temp file was created (t/temp/msnm_PXocc/0)
 ok 22 - Disk file size is plausible (1997)
 ok 23 - XML from disk buffer looks good
 ok 24 - Temp file was deleted
@@ -618,7 +654,7 @@
 ok 26 - No problem with text content of "0" even in sort key
 ok
 All tests successful.
-Files=7, Tests=117,  2 wallclock secs ( 0.04 usr  0.00 sys +  0.78 cusr  0.14 csys =  0.96 CPU)
+Files=7, Tests=117,  2 wallclock secs ( 0.08 usr  0.02 sys +  1.06 cusr  0.18 csys =  1.34 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/libxml-filter-sort-perl-1.01'
    create-stamp debian/debhelper-build-stamp
@@ -630,9 +666,9 @@
 Manifying 5 pod documents
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/perl5/XML/Filter/Sort.pm
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/perl5/XML/Filter/Sort/Buffer.pm
+Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/perl5/XML/Filter/Sort/DiskBuffer.pm
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/perl5/XML/Filter/Sort/DiskBufferMgr.pm
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/perl5/XML/Filter/Sort/BufferMgr.pm
-Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/perl5/XML/Filter/Sort/DiskBuffer.pm
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/man/man1/xmlsort.1p
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/man/man3/XML::Filter::Sort::DiskBufferMgr.3pm
 Installing /build/reproducible-path/libxml-filter-sort-perl-1.01/debian/libxml-filter-sort-perl/usr/share/man/man3/XML::Filter::Sort::DiskBuffer.3pm
@@ -662,12 +698,14 @@
 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/3621574/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3621574/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/2503184 and its subdirectories
-I: Current time: Sun Jan  7 07:40:52 -12 2024
-I: pbuilder-time-stamp: 1704656452
+I: removing directory /srv/workspace/pbuilder/3621574 and its subdirectories
+I: Current time: Sun Feb  9 16:04:22 +14 2025
+I: pbuilder-time-stamp: 1739066662