Diff of the two buildlogs:

--
--- b1/build.log	2025-01-01 08:52:45.580140612 +0000
+++ b2/build.log	2025-01-01 09:02:32.429256195 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Feb  3 03:13:12 -12 2026
-I: pbuilder-time-stamp: 1770131592
+I: Current time: Wed Jan  1 22:52:48 +14 2025
+I: pbuilder-time-stamp: 1735721568
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking qasync_0.27.1-4.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3219563/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/553492/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos11-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 Jan  1 08:53 /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/553492/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/553492/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=42 '
-  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]="37" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
+  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='99d276316f934a8cbe2390c5a0a7e041'
-  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='3219563'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=38167bad31f9493bb08954c72c7c9902
+  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=553492
   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.O0lU7TTE/pbuilderrc_q6vs --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.O0lU7TTE/b1 --logfile b1/build.log qasync_0.27.1-4.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.O0lU7TTE/pbuilderrc_HE2z --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.O0lU7TTE/b2 --logfile b2/build.log qasync_0.27.1-4.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos15-amd64 6.11.10+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.11.10-1~bpo12+1 (2024-12-19) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3219563/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/553492/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -363,7 +395,7 @@
 Get: 234 http://deb.debian.org/debian trixie/main amd64 python3-pyvirtualdisplay all 2.2-2 [13.7 kB]
 Get: 235 http://deb.debian.org/debian trixie/main amd64 xauth amd64 1:1.1.2-1.1 [35.9 kB]
 Get: 236 http://deb.debian.org/debian trixie/main amd64 python3-pytest-xvfb all 3.0.0-2 [8180 B]
-Fetched 145 MB in 3s (45.4 MB/s)
+Fetched 145 MB in 9s (15.5 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.12-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 ... 19965 files and directories currently installed.)
@@ -1141,8 +1173,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Feb  3 15:15:04 UTC 2026.
-Universal Time is now:  Tue Feb  3 15:15:04 UTC 2026.
+Local time is now:      Wed Jan  1 08:59:41 UTC 2025.
+Universal Time is now:  Wed Jan  1 08:59:41 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libxcb-present0:amd64 (1.17.0-2+b1) ...
@@ -1340,7 +1372,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/qasync-0.27.1/ && 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  > ../qasync_0.27.1-4_source.changes
+I: user script /srv/workspace/pbuilder/553492/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/553492/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/qasync-0.27.1/ && 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  > ../qasync_0.27.1-4_source.changes
 dpkg-buildpackage: info: source package qasync
 dpkg-buildpackage: info: source version 0.27.1-4
 dpkg-buildpackage: info: source distribution unstable
@@ -1382,7 +1418,7 @@
 platform linux -- Python 3.13.1, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.13_qasync/build
 configfile: pyproject.toml
-plugins: typeguard-4.4.1, xvfb-3.0.0
+plugins: xvfb-3.0.0, typeguard-4.4.1
 collected 46 items / 1 deselected / 45 selected
 
 tests/test_qeventloop.py .........................................       [ 91%]
@@ -1395,17 +1431,17 @@
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_handle_exception_in_executor[ProcessPoolExecutor]
-  /usr/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=3247251) is multi-threaded, use of fork() may lead to deadlocks in the child.
+  /usr/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=694313) is multi-threaded, use of fork() may lead to deadlocks in the child.
     self.pid = os.fork()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 45 passed, 1 deselected, 6 warnings in 0.81s =================
+================= 45 passed, 1 deselected, 6 warnings in 2.83s =================
 I: pybuild base:311: cd /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.12_qasync/build; python3.12 -m pytest -k 'not test_regression_bug13'
 ============================= test session starts ==============================
 platform linux -- Python 3.12.8, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.12_qasync/build
 configfile: pyproject.toml
-plugins: typeguard-4.4.1, xvfb-3.0.0
+plugins: xvfb-3.0.0, typeguard-4.4.1
 collected 46 items / 1 deselected / 45 selected
 
 tests/test_qeventloop.py .........................................       [ 91%]
@@ -1418,18 +1454,18 @@
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_handle_exception_in_executor[ProcessPoolExecutor]
-  /usr/lib/python3.12/multiprocessing/popen_fork.py:66: DeprecationWarning: This process (pid=3247589) is multi-threaded, use of fork() may lead to deadlocks in the child.
+  /usr/lib/python3.12/multiprocessing/popen_fork.py:66: DeprecationWarning: This process (pid=696510) is multi-threaded, use of fork() may lead to deadlocks in the child.
     self.pid = os.fork()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 45 passed, 1 deselected, 6 warnings in 0.82s =================
+================= 45 passed, 1 deselected, 6 warnings in 3.43s =================
 Testing pyqt6 ...
 I: pybuild base:311: cd /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.13_qasync/build; python3.13 -m pytest -k 'not test_regression_bug13'
 ============================= test session starts ==============================
 platform linux -- Python 3.13.1, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.13_qasync/build
 configfile: pyproject.toml
-plugins: typeguard-4.4.1, xvfb-3.0.0
+plugins: xvfb-3.0.0, typeguard-4.4.1
 collected 46 items / 1 deselected / 45 selected
 
 tests/test_qeventloop.py .........................................       [ 91%]
@@ -1442,17 +1478,17 @@
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_handle_exception_in_executor[ProcessPoolExecutor]
-  /usr/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=3249270) is multi-threaded, use of fork() may lead to deadlocks in the child.
+  /usr/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=700082) is multi-threaded, use of fork() may lead to deadlocks in the child.
     self.pid = os.fork()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 45 passed, 1 deselected, 6 warnings in 0.77s =================
+================= 45 passed, 1 deselected, 6 warnings in 4.54s =================
 I: pybuild base:311: cd /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.12_qasync/build; python3.12 -m pytest -k 'not test_regression_bug13'
 ============================= test session starts ==============================
 platform linux -- Python 3.12.8, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.12_qasync/build
 configfile: pyproject.toml
-plugins: typeguard-4.4.1, xvfb-3.0.0
+plugins: xvfb-3.0.0, typeguard-4.4.1
 collected 46 items / 1 deselected / 45 selected
 
 tests/test_qeventloop.py .........................................       [ 91%]
@@ -1465,18 +1501,18 @@
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_handle_exception_in_executor[ProcessPoolExecutor]
-  /usr/lib/python3.12/multiprocessing/popen_fork.py:66: DeprecationWarning: This process (pid=3249621) is multi-threaded, use of fork() may lead to deadlocks in the child.
+  /usr/lib/python3.12/multiprocessing/popen_fork.py:66: DeprecationWarning: This process (pid=703149) is multi-threaded, use of fork() may lead to deadlocks in the child.
     self.pid = os.fork()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 45 passed, 1 deselected, 6 warnings in 0.84s =================
+================= 45 passed, 1 deselected, 6 warnings in 4.88s =================
 Testing pyside6 ...
 I: pybuild base:311: cd /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.13_qasync/build; python3.13 -m pytest -k 'not test_regression_bug13'
 ============================= test session starts ==============================
 platform linux -- Python 3.13.1, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.13_qasync/build
 configfile: pyproject.toml
-plugins: typeguard-4.4.1, xvfb-3.0.0
+plugins: xvfb-3.0.0, typeguard-4.4.1
 collected 46 items / 1 deselected / 45 selected
 
 tests/test_qeventloop.py .........................................       [ 91%]
@@ -1489,17 +1525,17 @@
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_handle_exception_in_executor[ProcessPoolExecutor]
-  /usr/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=3249973) is multi-threaded, use of fork() may lead to deadlocks in the child.
+  /usr/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=706986) is multi-threaded, use of fork() may lead to deadlocks in the child.
     self.pid = os.fork()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 45 passed, 1 deselected, 6 warnings in 0.88s =================
+================= 45 passed, 1 deselected, 6 warnings in 3.91s =================
 I: pybuild base:311: cd /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.12_qasync/build; python3.12 -m pytest -k 'not test_regression_bug13'
 ============================= test session starts ==============================
 platform linux -- Python 3.12.8, pytest-8.3.3, pluggy-1.5.0
 rootdir: /build/reproducible-path/qasync-0.27.1/.pybuild/cpython3_3.12_qasync/build
 configfile: pyproject.toml
-plugins: typeguard-4.4.1, xvfb-3.0.0
+plugins: xvfb-3.0.0, typeguard-4.4.1
 collected 46 items / 1 deselected / 45 selected
 
 tests/test_qeventloop.py .........................................       [ 91%]
@@ -1512,11 +1548,11 @@
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_run_tasks_in_executor[ProcessPoolExecutor]
 tests/test_qeventloop.py::TestCanRunTasksInExecutor::test_can_handle_exception_in_executor[ProcessPoolExecutor]
-  /usr/lib/python3.12/multiprocessing/popen_fork.py:66: DeprecationWarning: This process (pid=3250464) is multi-threaded, use of fork() may lead to deadlocks in the child.
+  /usr/lib/python3.12/multiprocessing/popen_fork.py:66: DeprecationWarning: This process (pid=710664) is multi-threaded, use of fork() may lead to deadlocks in the child.
     self.pid = os.fork()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-================= 45 passed, 1 deselected, 6 warnings in 0.83s =================
+================= 45 passed, 1 deselected, 6 warnings in 3.75s =================
 make[1]: Leaving directory '/build/reproducible-path/qasync-0.27.1'
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
@@ -1548,12 +1584,14 @@
 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/553492/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/553492/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/3219563 and its subdirectories
-I: Current time: Tue Feb  3 03:15:43 -12 2026
-I: pbuilder-time-stamp: 1770131743
+I: removing directory /srv/workspace/pbuilder/553492 and its subdirectories
+I: Current time: Wed Jan  1 23:02:31 +14 2025
+I: pbuilder-time-stamp: 1735722151