Diff of the two buildlogs:

--
--- b1/build.log	2023-04-12 10:34:03.034091148 +0000
+++ b2/build.log	2023-04-12 10:35:08.891917012 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Apr 11 22:32:34 -12 2023
-I: pbuilder-time-stamp: 1681295554
+I: Current time: Wed May 15 06:57:06 +14 2024
+I: pbuilder-time-stamp: 1715705826
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./ruby-rotp_6.2.0.orig.tar.gz]
 I: copying [./ruby-rotp_6.2.0-2.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Thu Aug 26 23:06:24 2021 -12
+gpgv: Signature made Sat Aug 28 01:06:24 2021 +14
 gpgv:                using RSA key D30863E26020E543F4719A838F53E0193B294B75
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./ruby-rotp_6.2.0-2.dsc: no acceptable signature found
@@ -28,11 +28,20 @@
 dpkg-source: info: applying remove-require-relative.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/15857/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/11147/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink15-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
+lrwxrwxrwx 1 root root 4 Jan  6  2023 /bin/sh -> dash
+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/11147/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/11147/tmp/hooks/D02_print_environment starting
 I: set
   BUILDDIR='/build'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
+  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=8'
@@ -42,38 +51,38 @@
   IFS=' 	
   '
   LANG='C'
-  LANGUAGE='en_US:en'
+  LANGUAGE='nl_BE:nl'
   LC_ALL='C'
   MAIL='/var/mail/root'
   OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
+  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'
-  PPID='15857'
+  PPID='11147'
   PS1='# '
   PS2='> '
   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.oEYXdeci/pbuilderrc_Lmul --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.oEYXdeci/b1 --logfile b1/build.log ruby-rotp_6.2.0-2.dsc'
+  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.oEYXdeci/pbuilderrc_IzHI --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.oEYXdeci/b2 --logfile b2/build.log --extrapackages usrmerge ruby-rotp_6.2.0-2.dsc'
   SUDO_GID='117'
   SUDO_UID='110'
   SUDO_USER='jenkins'
   TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
+  TZ='/usr/share/zoneinfo/Etc/GMT-14'
   USER='root'
   USERNAME='root'
   _='/usr/bin/systemd-run'
   http_proxy='http://192.168.101.16:3128'
 I: uname -a
-  Linux codethink16-arm64 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 10 22:26 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/15857/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 13 06:47 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/11147/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -264,7 +273,7 @@
 Get: 139 http://deb.debian.org/debian bookworm/main arm64 ruby-simplecov all 0.22.0-1 [45.1 kB]
 Get: 140 http://deb.debian.org/debian bookworm/main arm64 ruby-timecop all 0.9.6-1 [10.3 kB]
 Get: 141 http://deb.debian.org/debian bookworm/main arm64 yard all 0.9.28-2 [387 kB]
-Fetched 47.1 MB in 1s (33.9 MB/s)
+Fetched 47.1 MB in 1s (39.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-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 ... 19616 files and directories currently installed.)
@@ -854,10 +863,15 @@
 Reading package lists...
 Building dependency tree...
 Reading state information...
+usrmerge is already the newest version (35).
 fakeroot is already the newest version (1.31-1.2).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/ruby-rotp-6.2.0/ && 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  > ../ruby-rotp_6.2.0-2_source.changes
+I: user script /srv/workspace/pbuilder/11147/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/11147/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/ruby-rotp-6.2.0/ && 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  > ../ruby-rotp_6.2.0-2_source.changes
 dpkg-buildpackage: info: source package ruby-rotp
 dpkg-buildpackage: info: source version 6.2.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -904,7 +918,7 @@
 	dh_ruby --build
    dh_auto_test -O--buildsystem=ruby
 	dh_ruby --test
-	rm -fr -- /tmp/dh-xdg-rundir-OZBbqh5n
+	rm -fr -- /tmp/dh-xdg-rundir-jUzBmpxs
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
 debian/rules:13: warning: overriding recipe for target 'override_dh_installdocs'
@@ -1118,7 +1132,7 @@
     Dropbox 26 char secret output
       matches the known output
 
-Finished in 0.33005 seconds (files took 1.08 seconds to load)
+Finished in 0.23435 seconds (files took 0.82957 seconds to load)
 78 examples, 0 failures
 
 Coverage report generated for RSpec to /build/ruby-rotp-6.2.0/coverage. 255 / 255 LOC (100.0%) covered.
@@ -1231,12 +1245,14 @@
 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/11147/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/11147/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/15857 and its subdirectories
-I: Current time: Tue Apr 11 22:34:01 -12 2023
-I: pbuilder-time-stamp: 1681295641
+I: removing directory /srv/workspace/pbuilder/11147 and its subdirectories
+I: Current time: Wed May 15 06:58:07 +14 2024
+I: pbuilder-time-stamp: 1715705887