Diff of the two buildlogs:

--
--- b1/build.log	2024-06-01 14:24:10.608996049 +0000
+++ b2/build.log	2024-06-01 14:25:31.737538083 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Jun  1 02:19:27 -12 2024
-I: pbuilder-time-stamp: 1717251567
+I: Current time: Sat Jul  5 10:47:12 +14 2025
+I: pbuilder-time-stamp: 1751662032
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -23,52 +23,84 @@
 dpkg-source: info: unpacking pkg-perl-tools_0.79.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1701056/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3826440/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-amd64.
+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 Jul  4 20:47 /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/3826440/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3826440/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='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="x86_64-pc-linux-gnu")
+  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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='e501f4cf8b0f468e8e81e31e66a523f1'
-  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='1701056'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=374724451409494e8da1ea437ef5e21a
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-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=3826440
   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.KsTpShsL/pbuilderrc_P0aL --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.KsTpShsL/b1 --logfile b1/build.log pkg-perl-tools_0.79.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  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.KsTpShsL/pbuilderrc_olSz --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.KsTpShsL/b2 --logfile b2/build.log pkg-perl-tools_0.79.dsc'
+  SUDO_GID=111
+  SUDO_UID=106
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://213.165.73.152:3128
 I: uname -a
-  Linux ionos1-amd64 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.7.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1~bpo12+1 (2024-05-06) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun  1 07:43 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1701056/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun 30 14:05 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3826440/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -445,7 +477,7 @@
 Get: 282 http://deb.debian.org/debian unstable/main amd64 unzip amd64 6.0-28 [166 kB]
 Get: 283 http://deb.debian.org/debian unstable/main amd64 lintian all 2.117.0 [1052 kB]
 Get: 284 http://deb.debian.org/debian unstable/main amd64 spell amd64 1.1-2 [24.3 kB]
-Fetched 56.1 MB in 2s (28.1 MB/s)
+Fetched 56.1 MB in 8s (6737 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-minimal:amd64.
 (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 ... 19719 files and directories currently installed.)
@@ -1394,8 +1426,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Jun  1 14:22:04 UTC 2024.
-Universal Time is now:  Sat Jun  1 14:22:04 UTC 2024.
+Local time is now:      Fri Jul  4 20:48:04 UTC 2025.
+Universal Time is now:  Fri Jul  4 20:48:04 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libsystem-command-perl (1.122-1) ...
@@ -1629,7 +1661,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/pkg-perl-tools-0.79/ && 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  > ../pkg-perl-tools_0.79_source.changes
+I: user script /srv/workspace/pbuilder/3826440/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3826440/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/pkg-perl-tools-0.79/ && 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  > ../pkg-perl-tools_0.79_source.changes
 dpkg-buildpackage: info: source package pkg-perl-tools
 dpkg-buildpackage: info: source version 0.79
 dpkg-buildpackage: info: source distribution unstable
@@ -1650,12 +1686,12 @@
    dh_autoreconf
    dh_auto_configure
    dh_auto_build
-	make -j20 "INSTALL=install --strip-program=true"
+	make -j42 "INSTALL=install --strip-program=true"
 make[1]: Entering directory '/build/reproducible-path/pkg-perl-tools-0.79'
 make[1]: Nothing to be done for 'all'.
 make[1]: Leaving directory '/build/reproducible-path/pkg-perl-tools-0.79'
    dh_auto_test
-	make -j20 test
+	make -j42 test
 make[1]: Entering directory '/build/reproducible-path/pkg-perl-tools-0.79'
 for f in `find bin scripts -maxdepth 1 -type f`; do \
     if head -1 $f | grep -q bin/perl; then \
@@ -1668,53 +1704,53 @@
 	sh -n $f && echo "$f shell script OK" || exit 1; \
     fi \
 done
+bin/dpt shell script OK
 bin/pristine-orig shell script OK
 bin/dh-make-perl-dev shell script OK
-bin/dpt shell script OK
+bin/patchedit syntax OK
 bin/bts-retitle bash script OK
 bin/bts-srcpkg syntax OK
-bin/patchedit syntax OK
-scripts/import-orig bash script OK
-scripts/github-oauth syntax OK
-scripts/uscan shell script OK
-scripts/checkout shell script OK
-scripts/packagecheck bash script OK
+scripts/ci-failures syntax OK
 scripts/debian-upstream syntax OK
-scripts/upstream-repo shell script OK
-scripts/fixup shell script OK
-scripts/missing-upstream syntax OK
+scripts/gc shell script OK
 scripts/shell-lib shell script OK
-scripts/invite-github syntax OK
-scripts/salsa syntax OK
+scripts/get-ubuntu-packages shell script OK
+scripts/uscan shell script OK
+scripts/lp-mass-subscribe python script OK
+scripts/cd shell script OK
 scripts/dch-note shell script OK
-scripts/repack.sh shell script OK
+scripts/rename-uploader shell script OK
+scripts/invite-github syntax OK
+scripts/new-upstream syntax OK
+scripts/github-oauth syntax OK
+scripts/fixup shell script OK
+scripts/missing-upstream syntax OK
+scripts/import-orig bash script OK
 scripts/forward syntax OK
-scripts/get-ubuntu-packages shell script OK
-scripts/missing-upload shell script OK
+scripts/never-uploaded syntax OK
 scripts/push shell script OK
-scripts/gen-itp syntax OK
-scripts/gc shell script OK
-scripts/new-upstream syntax OK
 scripts/clean-mr-repos syntax OK
+scripts/missing-upload shell script OK
+scripts/missing-pristine-tar shell script OK
+scripts/checkout shell script OK
+scripts/takeover shell script OK
+scripts/gen-itp syntax OK
+scripts/salsa syntax OK
+scripts/packagecheck bash script OK
 scripts/ready-for-upload syntax OK
-scripts/lp-mass-subscribe python script OK
+scripts/upstream-repo shell script OK
+scripts/repack.sh shell script OK
 scripts/prepare shell script OK
-scripts/rename-uploader shell script OK
-scripts/takeover shell script OK
-scripts/cd shell script OK
-scripts/never-uploaded syntax OK
-scripts/missing-pristine-tar shell script OK
-scripts/ci-failures syntax OK
 for f in `find . -name '*.pm' -type f`; do \
     perl -Ilib -c $f || exit 1; \
 done
 ./lintian/checks/PkgPerl/Nocheck.pm syntax OK
 ./lintian/checks/PkgPerl/Changelog.pm syntax OK
-./lib/Debian/PkgPerl/Patch.pm syntax OK
+./lib/Debian/PkgPerl/Bug.pm syntax OK
 ./lib/Debian/PkgPerl/Util.pm syntax OK
+./lib/Debian/PkgPerl/Patch.pm syntax OK
 ./lib/Debian/PkgPerl/GitHub.pm syntax OK
 ./lib/Debian/PkgPerl/Message.pm syntax OK
-./lib/Debian/PkgPerl/Bug.pm syntax OK
 prove -l --verbose --recurse t/
 t/bug.t ..................... skipped: Set AUTHOR_TESTING to perform these tests
 t/github.t .................. skipped: Set AUTHOR_TESTING to perform this test
@@ -1765,7 +1801,7 @@
 ok 40 - POD test for man5/dpt-lib.sh.pod
 ok
 All tests successful.
-Files=6, Tests=40,  4 wallclock secs ( 0.07 usr  0.04 sys +  2.37 cusr  0.26 csys =  2.74 CPU)
+Files=6, Tests=40,  1 wallclock secs ( 0.03 usr  0.01 sys +  0.91 cusr  0.11 csys =  1.06 CPU)
 Result: PASS
 prove -l --verbose --recurse --ext .st t/
 t/spelling.st .. 
@@ -1815,7 +1851,7 @@
 1..43
 ok
 All tests successful.
-Files=1, Tests=43, 13 wallclock secs ( 0.05 usr  0.01 sys +  1.31 cusr  0.25 csys =  1.62 CPU)
+Files=1, Tests=43,  1 wallclock secs ( 0.04 usr  0.00 sys +  0.55 cusr  0.12 csys =  0.71 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/pkg-perl-tools-0.79'
    create-stamp debian/debhelper-build-stamp
@@ -1976,12 +2012,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/3826440/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3826440/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/1701056 and its subdirectories
-I: Current time: Sat Jun  1 02:24:09 -12 2024
-I: pbuilder-time-stamp: 1717251849
+I: removing directory /srv/workspace/pbuilder/3826440 and its subdirectories
+I: Current time: Sat Jul  5 10:48:31 +14 2025
+I: pbuilder-time-stamp: 1751662111