Diff of the two buildlogs:

--
--- b1/build.log	2025-03-07 13:02:29.133582528 +0000
+++ b2/build.log	2025-03-07 13:06:46.885952855 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Apr  9 07:24:25 -12 2026
-I: pbuilder-time-stamp: 1775762665
+I: Current time: Sat Mar  8 03:02:32 +14 2025
+I: pbuilder-time-stamp: 1741352552
 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: applying 0002-disable-tests.diff
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3701279/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3184918/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 Mar  7 13:02 /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/3184918/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3184918/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='984549ec09374abe8480519d6ddf8f14'
-  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='3701279'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=33270d5e7f0b45cf9d17a49509ea1770
+  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=3184918
   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.454keAOu/pbuilderrc_FTyb --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.454keAOu/b1 --logfile b1/build.log emacs-python-environment_0.0.2-7.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.454keAOu/pbuilderrc_8OBr --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.454keAOu/b2 --logfile b2/build.log emacs-python-environment_0.0.2-7.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 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) 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/3701279/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3184918/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -230,7 +262,7 @@
 Get: 116 http://deb.debian.org/debian trixie/main amd64 python3-wheel-whl all 0.45.1-1 [75.3 kB]
 Get: 117 http://deb.debian.org/debian trixie/main amd64 python3-virtualenv all 20.29.1+ds-1 [71.6 kB]
 Get: 118 http://deb.debian.org/debian trixie/main amd64 virtualenv all 20.29.1+ds-1 [7136 B]
-Fetched 90.5 MB in 5s (17.4 MB/s)
+Fetched 90.5 MB in 8s (10.9 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-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 ... 19800 files and directories currently installed.)
@@ -629,8 +661,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Apr  9 19:25:11 UTC 2026.
-Universal Time is now:  Thu Apr  9 19:25:11 UTC 2026.
+Local time is now:      Fri Mar  7 13:05:11 UTC 2025.
+Universal Time is now:  Fri Mar  7 13:05:11 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up liberror-perl (0.17030-1) ...
@@ -750,7 +782,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/emacs-python-environment-0.0.2/ && 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  > ../emacs-python-environment_0.0.2-7_source.changes
+I: user script /srv/workspace/pbuilder/3184918/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3184918/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/emacs-python-environment-0.0.2/ && 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  > ../emacs-python-environment_0.0.2-7_source.changes
 dpkg-buildpackage: info: source package emacs-python-environment
 dpkg-buildpackage: info: source version 0.0.2-7
 dpkg-buildpackage: info: source distribution unstable
@@ -760,7 +796,7 @@
  debian/rules clean
 dh clean --with elpa
    dh_auto_clean
-	make -j42 clean
+	make -j20 clean
 make[1]: Entering directory '/build/reproducible-path/emacs-python-environment-0.0.2'
 rm -f *.elc
 make[1]: Leaving directory '/build/reproducible-path/emacs-python-environment-0.0.2'
@@ -776,9 +812,9 @@
 make[1]: Leaving directory '/build/reproducible-path/emacs-python-environment-0.0.2'
    dh_elpa_test
 	emacs -batch -Q -l package --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa\")" --eval "(add-to-list 'package-directory-list \"/usr/share/emacs/site-lisp/elpa-src\")" --eval "(setq ert-batch-backtrace-right-margin nil)" -f package-initialize -L . -l test-python-environment.el -f ert-run-tests-batch-and-exit
-Running 14 tests (2026-04-09 07:25:21-1200, selector `t')
-Making virtualenv at /tmp/pye-test-MMu9NX/default (SYNC)...
-Making virtualenv at /tmp/pye-test-MMu9NX/default (SYNC)...Done
+Running 14 tests (2025-03-08 03:06:25+1400, selector `t')
+Making virtualenv at /tmp/pye-test-8yntzI/default (SYNC)...
+Making virtualenv at /tmp/pye-test-8yntzI/default (SYNC)...Done
 Running: python -c 1/0 (SYNC)...
 Traceback (most recent call last):
   File "<string>", line 1, in <module>
@@ -787,52 +823,52 @@
 ZeroDivisionError: division by zero
 
 Running: python -c 1/0 (SYNC)...Done
-   passed   1/14  pye-test-block-error (0.700006 sec)
+   passed   1/14  pye-test-block-error (2.989569 sec)
 DUMMY-MESSAGE (SYNC)...
 
 DUMMY-MESSAGE (SYNC)...Done
-   passed   2/14  pye-test-blocking-process-error-with-verbose (0.001330 sec)
+   passed   2/14  pye-test-blocking-process-error-with-verbose (0.022284 sec)
 DUMMY-MESSAGE (SYNC)...
 
 DUMMY-MESSAGE (SYNC)...Done
-   passed   3/14  pye-test-blocking-process-error-without-verbose (0.001338 sec)
+   passed   3/14  pye-test-blocking-process-error-without-verbose (0.019715 sec)
 DUMMY-MESSAGE (SYNC)...
 
 DUMMY-MESSAGE (SYNC)...Done
-   passed   4/14  pye-test-blocking-process-noerror-with-verbose (0.001146 sec)
+   passed   4/14  pye-test-blocking-process-noerror-with-verbose (0.019651 sec)
 DUMMY-MESSAGE (SYNC)...
 DUMMY-MESSAGE (SYNC)...Done
-   passed   5/14  pye-test-blocking-process-noerror-without-verbose (0.001149 sec)
+   passed   5/14  pye-test-blocking-process-noerror-without-verbose (0.023613 sec)
 DUMMY-MESSAGE (SYNC)...
 DUMMY-ECHO-MESSAGE
 
 DUMMY-MESSAGE (SYNC)...Done
-   passed   6/14  pye-test-blocking-process-output-message (0.001401 sec)
+   passed   6/14  pye-test-blocking-process-output-message (0.008041 sec)
 DUMMY-MESSAGE...
 DUMMY-MESSAGE...Done
-   passed   7/14  pye-test-deferred-process-error-with-verbose (0.302800 sec)
+   passed   7/14  pye-test-deferred-process-error-with-verbose (0.310952 sec)
 DUMMY-MESSAGE...
 DUMMY-MESSAGE...Done
-   passed   8/14  pye-test-deferred-process-error-without-verbose (0.302621 sec)
+   passed   8/14  pye-test-deferred-process-error-without-verbose (0.311513 sec)
 DUMMY-MESSAGE...
 DUMMY-MESSAGE...Done
 
-   passed   9/14  pye-test-deferred-process-noerror-with-verbose (0.302636 sec)
+   passed   9/14  pye-test-deferred-process-noerror-with-verbose (0.311503 sec)
 DUMMY-MESSAGE...
 DUMMY-MESSAGE...Done
-   passed  10/14  pye-test-deferred-process-noerror-without-verbose (0.302614 sec)
+   passed  10/14  pye-test-deferred-process-noerror-without-verbose (0.309094 sec)
 DUMMY-MESSAGE...
 DUMMY-MESSAGE...Done
 DUMMY-ECHO-MESSAGE
 
-   passed  11/14  pye-test-deferred-process-output-message (0.302709 sec)
-   passed  12/14  pye-test-eval-in-subprocess (0.284704 sec)
-   passed  13/14  pye-test-make-environment-with-non-existing-command (0.000554 sec)
+   passed  11/14  pye-test-deferred-process-output-message (0.309388 sec)
+   passed  12/14  pye-test-eval-in-subprocess (0.999830 sec)
+   passed  13/14  pye-test-make-environment-with-non-existing-command (0.000801 sec)
 test-1
 test-2
-   passed  14/14  pye-test-test-with-capture-message (0.000115 sec)
+   passed  14/14  pye-test-test-with-capture-message (0.000721 sec)
 
-Ran 14 tests, 14 results as expected, 0 unexpected (2026-04-09 07:25:24-1200, 2.507232 sec)
+Ran 14 tests, 14 results as expected, 0 unexpected (2025-03-08 03:06:31+1400, 5.648840 sec)
 
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -858,12 +894,14 @@
 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/3184918/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3184918/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/3701279 and its subdirectories
-I: Current time: Thu Apr  9 07:25:27 -12 2026
-I: pbuilder-time-stamp: 1775762727
+I: removing directory /srv/workspace/pbuilder/3184918 and its subdirectories
+I: Current time: Sat Mar  8 03:06:45 +14 2025
+I: pbuilder-time-stamp: 1741352805