Diff of the two buildlogs:

--
--- b1/build.log	2025-01-14 17:17:21.324965384 +0000
+++ b2/build.log	2025-01-14 17:14:47.308024532 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 14 05:14:55 -12 2025
-I: pbuilder-time-stamp: 1736874895
+I: Current time: Wed Jan 15 07:12:13 +14 2025
+I: pbuilder-time-stamp: 1736874733
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: applying py313-maxsplit-keyword.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/16153/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/13679/tmp/hooks/D01_modify_environment starting
+debug: Running on virt32z.
+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 Jan 14 17:12 /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/13679/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/13679/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]="37" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.37(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='e486313ecb564316b4dfe42efcf01f88'
-  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='16153'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=96c7ba6c3f154d7ebe04d8eb3069527b
+  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=13679
   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.njKfCjav/pbuilderrc_VAf5 --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.njKfCjav/b1 --logfile b1/build.log dnarrange_1.5.3-1.1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  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.njKfCjav/pbuilderrc_vcgX --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.njKfCjav/b2 --logfile b2/build.log dnarrange_1.5.3-1.1.dsc'
+  SUDO_GID=110
+  SUDO_UID=103
+  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 virt64b 6.1.0-29-arm64 #1 SMP Debian 6.1.123-1 (2025-01-02) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-29-armmp-lpae #1 SMP Debian 6.1.123-1 (2025-01-02) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/16153/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/13679/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -183,7 +215,7 @@
 Get: 68 http://deb.debian.org/debian unstable/main armhf libpython3.12-stdlib armhf 3.12.8-5 [1832 kB]
 Get: 69 http://deb.debian.org/debian unstable/main armhf python3.12 armhf 3.12.8-5 [677 kB]
 Get: 70 http://deb.debian.org/debian unstable/main armhf python3-all armhf 3.13.1-2 [1056 B]
-Fetched 32.6 MB in 1s (38.4 MB/s)
+Fetched 32.6 MB in 8s (4336 kB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:armhf.
 (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 ... 19563 files and directories currently installed.)
@@ -428,8 +460,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Jan 14 17:16:22 UTC 2025.
-Universal Time is now:  Tue Jan 14 17:16:22 UTC 2025.
+Local time is now:      Tue Jan 14 17:13:29 UTC 2025.
+Universal Time is now:  Tue Jan 14 17:13:29 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -492,7 +524,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/dnarrange-1.5.3/ && 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  > ../dnarrange_1.5.3-1.1_source.changes
+I: user script /srv/workspace/pbuilder/13679/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/13679/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/dnarrange-1.5.3/ && 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  > ../dnarrange_1.5.3-1.1_source.changes
 dpkg-buildpackage: info: source package dnarrange
 dpkg-buildpackage: info: source version 1.5.3-1.1
 dpkg-buildpackage: info: source distribution unstable
@@ -598,16 +634,16 @@
 Skipping SOURCES.txt
 running install_scripts
 creating /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
-copying build/scripts-3.12/dnarrange-merge -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
-copying build/scripts-3.12/dnarrange -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
-copying build/scripts-3.12/dnarrange-link -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
 copying build/scripts-3.12/last-multiplot -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
 copying build/scripts-3.12/dnarrange-genes -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+copying build/scripts-3.12/dnarrange-link -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+copying build/scripts-3.12/dnarrange-merge -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+copying build/scripts-3.12/dnarrange -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/last-multiplot to 775
+changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-genes to 755
+changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-link to 755
 changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-merge to 755
 changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange to 755
-changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-link to 755
-changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/last-multiplot to 755
-changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-genes to 755
 I: pybuild base:311: /usr/bin/python3 setup.py install --root /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange 
 running install
 /usr/lib/python3/dist-packages/setuptools/_distutils/cmd.py:66: SetuptoolsDeprecationWarning: setup.py install is deprecated.
@@ -636,16 +672,16 @@
 Copying dnarrange.egg-info to /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/lib/python3.13/dist-packages/dnarrange-1.5.3.egg-info
 Skipping SOURCES.txt
 running install_scripts
-copying build/scripts-3.13/dnarrange-merge -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
-copying build/scripts-3.13/dnarrange -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
-copying build/scripts-3.13/dnarrange-link -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
 copying build/scripts-3.13/last-multiplot -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
 copying build/scripts-3.13/dnarrange-genes -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+copying build/scripts-3.13/dnarrange-link -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+copying build/scripts-3.13/dnarrange-merge -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+copying build/scripts-3.13/dnarrange -> /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin
+changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/last-multiplot to 775
+changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-genes to 755
+changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-link to 755
 changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-merge to 755
 changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange to 755
-changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-link to 755
-changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/last-multiplot to 755
-changing mode of /build/reproducible-path/dnarrange-1.5.3/debian/dnarrange/usr/bin/dnarrange-genes to 755
    dh_installdocs -O--buildsystem=pybuild
    dh_installchangelogs -O--buildsystem=pybuild
    dh_python3 -O--buildsystem=pybuild
@@ -669,12 +705,14 @@
 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/13679/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/13679/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/16153 and its subdirectories
-I: Current time: Tue Jan 14 05:17:17 -12 2025
-I: pbuilder-time-stamp: 1736875037
+I: removing directory /srv/workspace/pbuilder/13679 and its subdirectories
+I: Current time: Wed Jan 15 07:14:43 +14 2025
+I: pbuilder-time-stamp: 1736874883