Diff of the two buildlogs:

--
--- b1/build.log	2024-12-20 07:54:15.681852138 +0000
+++ b2/build.log	2024-12-20 08:02:37.990922348 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Dec 19 19:51:01 -12 2024
-I: pbuilder-time-stamp: 1734681061
+I: Current time: Fri Jan 23 04:17:18 +14 2026
+I: pbuilder-time-stamp: 1769091438
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -30,52 +30,84 @@
 dpkg-source: info: applying remove_psycopg2-binary
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1462617/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4075506/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink01-arm64.
+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 22 14:17 /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/4075506/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4075506/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='9f48fc87fe4649b29f58b060c5d963df'
-  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='1462617'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=170398fa62d74248be23f0508d4e0ddc
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=4075506
   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.gdcCX45z/pbuilderrc_9Rul --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.gdcCX45z/b1 --logfile b1/build.log pybel_0.15.5-1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.gdcCX45z/pbuilderrc_NLFY --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.gdcCX45z/b2 --logfile b2/build.log pybel_0.15.5-1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink04-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1462617/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/4075506/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -276,7 +308,7 @@
 Get: 123 http://deb.debian.org/debian unstable/main arm64 python3-ratelimit all 2.2.1-2 [6108 B]
 Get: 124 http://deb.debian.org/debian unstable/main arm64 python3-sqlalchemy all 2.0.32+ds1-1 [1196 kB]
 Get: 125 http://deb.debian.org/debian unstable/main arm64 python3-tabulate all 0.9.0-1 [45.9 kB]
-Fetched 72.2 MB in 1s (68.9 MB/s)
+Fetched 72.2 MB in 2s (37.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.12-minimal:arm64.
 (Reading database ... 
(Reading database ... 5%
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(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 20084 files and directories currently installed.)
@@ -685,8 +717,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Fri Dec 20 07:51:58 UTC 2024.
-Universal Time is now:  Fri Dec 20 07:51:58 UTC 2024.
+Local time is now:      Thu Jan 22 14:18:48 UTC 2026.
+Universal Time is now:  Thu Jan 22 14:18:48 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libpython3.13-minimal:arm64 (3.13.1-2) ...
@@ -814,7 +846,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/pybel-0.15.5/ && 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  > ../pybel_0.15.5-1_source.changes
+I: user script /srv/workspace/pbuilder/4075506/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/4075506/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/pybel-0.15.5/ && 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  > ../pybel_0.15.5-1_source.changes
 dpkg-buildpackage: info: source package pybel
 dpkg-buildpackage: info: source version 0.15.5-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1720,7 +1756,7 @@
 Copying src/pybel.egg-info to build/bdist.linux-aarch64/wheel/./pybel-0.15.5.egg-info
 running install_scripts
 creating build/bdist.linux-aarch64/wheel/pybel-0.15.5.dist-info/WHEEL
-creating '/build/reproducible-path/pybel-0.15.5/.pybuild/cpython3_3.13_pybel/.tmp-rfzkckky/pybel-0.15.5-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
+creating '/build/reproducible-path/pybel-0.15.5/.pybuild/cpython3_3.13_pybel/.tmp-z89e2gwm/pybel-0.15.5-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
 adding 'pybel/__init__.py'
 adding 'pybel/__main__.py'
 adding 'pybel/canonicalize.py'
@@ -2576,7 +2612,7 @@
 Copying src/pybel.egg-info to build/bdist.linux-aarch64/wheel/./pybel-0.15.5.egg-info
 running install_scripts
 creating build/bdist.linux-aarch64/wheel/pybel-0.15.5.dist-info/WHEEL
-creating '/build/reproducible-path/pybel-0.15.5/.pybuild/cpython3_3.12_pybel/.tmp-5kaa14fq/pybel-0.15.5-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
+creating '/build/reproducible-path/pybel-0.15.5/.pybuild/cpython3_3.12_pybel/.tmp-pcab82he/pybel-0.15.5-py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
 adding 'pybel/__init__.py'
 adding 'pybel/__main__.py'
 adding 'pybel/canonicalize.py'
@@ -2957,7 +2993,7 @@
     return self.dict().get(metaprefix) or dict()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-======== 550 passed, 6 skipped, 171 deselected, 9011 warnings in 6.63s =========
+======== 550 passed, 6 skipped, 171 deselected, 9011 warnings in 40.90s ========
 I: pybuild base:311: cd /build/reproducible-path/pybel-0.15.5/.pybuild/cpython3_3.12_pybel/build; python3.12 -m pytest --ignore=tests/test_grounding.py -k ' not test_seeding and not test_import and not test_manager_graph and not test_insert_namespace_persistent and not test_parse_metadata and not test_bel_simple and not test_bel_thorough and not test_update_matrix_activation and not test_update_matrix_activation_phosphorylation and not test_update_matrix_activation_ubiquination and not test_update_matrix_association and not test_update_matrix_expression and not test_update_matrix_inhibition and not test_update_matrix_inhibition_phosphorylation and not test_update_matrix_inhibition_ubiquination and not test_update_matrix_pmods and not test_update_matrix_repression and not test_reset_citation and not test_set_regex and not test_get_random_path '
 ============================= test session starts ==============================
 platform linux -- Python 3.12.8, pytest-8.3.4, pluggy-1.5.0
@@ -3108,7 +3144,7 @@
     return self.dict().get(metaprefix) or dict()
 
 -- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
-======== 550 passed, 6 skipped, 171 deselected, 9011 warnings in 9.24s =========
+======== 550 passed, 6 skipped, 171 deselected, 9011 warnings in 44.79s ========
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild
    dh_prep -O--buildsystem=pybuild
@@ -3152,12 +3188,14 @@
 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/4075506/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4075506/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/1462617 and its subdirectories
-I: Current time: Thu Dec 19 19:54:14 -12 2024
-I: pbuilder-time-stamp: 1734681254
+I: removing directory /srv/workspace/pbuilder/4075506 and its subdirectories
+I: Current time: Fri Jan 23 04:25:36 +14 2026
+I: pbuilder-time-stamp: 1769091936