Diff of the two buildlogs:

--
--- b1/build.log	2024-10-28 19:04:21.189767016 +0000
+++ b2/build.log	2024-10-28 19:05:14.103892811 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Oct 28 07:02:13 -12 2024
-I: pbuilder-time-stamp: 1730142133
+I: Current time: Mon Dec  1 15:27:26 +14 2025
+I: pbuilder-time-stamp: 1764552446
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking yarsync_0.2.1-3.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2235763/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1282251/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos5-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 Dec  1 01:27 /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/1282251/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1282251/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='trixie'
-  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]="32" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.32(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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='4724116bda7541cabbc50f9f306adb2b'
-  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='2235763'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=f63ce49ef422445fa68467fc0f6ffc75
+  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=1282251
   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.Fun2evgJ/pbuilderrc_MgoT --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.Fun2evgJ/b1 --logfile b1/build.log yarsync_0.2.1-3.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.Fun2evgJ/pbuilderrc_ZsuU --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.Fun2evgJ/b2 --logfile b2/build.log yarsync_0.2.1-3.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  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 6.1.0-26-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.112-1 (2024-09-30) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.10.11+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.10.11-1~bpo12+1 (2024-10-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2235763/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1282251/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -206,7 +238,7 @@
 Get: 82 http://deb.debian.org/debian trixie/main amd64 python3-pytest all 8.3.3-1 [249 kB]
 Get: 83 http://deb.debian.org/debian trixie/main amd64 python3-pytest-cov all 5.0.0-1 [26.8 kB]
 Get: 84 http://deb.debian.org/debian trixie/main amd64 python3-pytest-mock all 3.14.0-1 [18.2 kB]
-Fetched 29.9 MB in 7s (4383 kB/s)
+Fetched 29.9 MB in 0s (103 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libjs-jquery.
 (Reading database ... 
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(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19947 files and directories currently installed.)
@@ -493,8 +525,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Oct 28 19:03:42 UTC 2024.
-Universal Time is now:  Mon Oct 28 19:03:42 UTC 2024.
+Local time is now:      Mon Dec  1 01:27:53 UTC 2025.
+Universal Time is now:  Mon Dec  1 01:27:53 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -573,7 +605,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/yarsync-0.2.1/ && 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  > ../yarsync_0.2.1-3_source.changes
+I: user script /srv/workspace/pbuilder/1282251/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/1282251/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/yarsync-0.2.1/ && 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  > ../yarsync_0.2.1-3_source.changes
 dpkg-buildpackage: info: source package yarsync
 dpkg-buildpackage: info: source version 0.2.1-3
 dpkg-buildpackage: info: source distribution unstable
@@ -600,18 +636,18 @@
 creating build
 creating build/lib
 creating build/lib/yarsync
+copying yarsync/yarsync.py -> build/lib/yarsync
 copying yarsync/version.py -> build/lib/yarsync
 copying yarsync/__init__.py -> build/lib/yarsync
-copying yarsync/yarsync.py -> build/lib/yarsync
 installing to build/bdist.linux-x86_64/wheel
 running install
 running install_lib
 creating build/bdist.linux-x86_64
 creating build/bdist.linux-x86_64/wheel
 creating build/bdist.linux-x86_64/wheel/yarsync
+copying build/lib/yarsync/yarsync.py -> build/bdist.linux-x86_64/wheel/./yarsync
 copying build/lib/yarsync/version.py -> build/bdist.linux-x86_64/wheel/./yarsync
 copying build/lib/yarsync/__init__.py -> build/bdist.linux-x86_64/wheel/./yarsync
-copying build/lib/yarsync/yarsync.py -> build/bdist.linux-x86_64/wheel/./yarsync
 running install_egg_info
 running egg_info
 creating yarsync.egg-info
@@ -626,7 +662,7 @@
 Copying yarsync.egg-info to build/bdist.linux-x86_64/wheel/./yarsync-0.2.1.egg-info
 running install_scripts
 creating build/bdist.linux-x86_64/wheel/yarsync-0.2.1.dist-info/WHEEL
-creating '/build/reproducible-path/yarsync-0.2.1/.pybuild/cpython3_3.12_yarsync/.tmp-8rd2xcwj/yarsync-0.2.1-py3-none-any.whl' and adding 'build/bdist.linux-x86_64/wheel' to it
+creating '/build/reproducible-path/yarsync-0.2.1/.pybuild/cpython3_3.12_yarsync/.tmp-euhham8_/yarsync-0.2.1-py3-none-any.whl' and adding 'build/bdist.linux-x86_64/wheel' to it
 adding 'yarsync/__init__.py'
 adding 'yarsync/version.py'
 adding 'yarsync/yarsync.py'
@@ -645,7 +681,7 @@
 platform linux -- Python 3.12.6, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/yarsync-0.2.1/.pybuild/cpython3_3.12_yarsync/build
 configfile: pytest.ini
-plugins: mock-3.14.0, typeguard-4.3.0, cov-5.0.0
+plugins: cov-5.0.0, mock-3.14.0, typeguard-4.3.0
 collected 31 items
 
 tests/test_commit.py ......                                              [ 19%]
@@ -657,7 +693,7 @@
 tests/test_sync.py ..                                                    [ 74%]
 tests/test_ys_helpers.py ........                                        [100%]
 
-============================== 31 passed in 2.13s ==============================
+============================== 31 passed in 1.58s ==============================
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -686,12 +722,14 @@
 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/1282251/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1282251/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/2235763 and its subdirectories
-I: Current time: Mon Oct 28 07:04:20 -12 2024
-I: pbuilder-time-stamp: 1730142260
+I: removing directory /srv/workspace/pbuilder/1282251 and its subdirectories
+I: Current time: Mon Dec  1 15:28:11 +14 2025
+I: pbuilder-time-stamp: 1764552491