Diff of the two buildlogs:

--
--- b1/build.log	2023-04-11 12:45:39.720303913 +0000
+++ b2/build.log	2023-04-11 12:46:22.206894302 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon May 13 07:07:51 -12 2024
-I: pbuilder-time-stamp: 1715627271
+I: Current time: Wed Apr 12 02:45:42 +14 2023
+I: pbuilder-time-stamp: 1681217142
 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 [./libclass-ooorno-perl_0.011.orig.tar.gz]
 I: copying [./libclass-ooorno-perl_0.011-3.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sun Dec  4 02:09:48 2022 -12
+gpgv: Signature made Mon Dec  5 04:09:48 2022 +14
 gpgv:                using RSA key B23862C415D6565A4E86CBD7579C160D4C9E23E8
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./libclass-ooorno-perl_0.011-3.dsc: no acceptable signature found
@@ -25,11 +25,20 @@
 dpkg-source: info: unpacking libclass-ooorno-perl_0.011-3.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/10056/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/27246/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink14-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 03:20 /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/27246/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/27246/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'
@@ -39,38 +48,38 @@
   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='10056'
+  PPID='27246'
   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.ZfETX3VF/pbuilderrc_gpDr --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.ZfETX3VF/b1 --logfile b1/build.log libclass-ooorno-perl_0.011-3.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.ZfETX3VF/pbuilderrc_y8OM --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.ZfETX3VF/b2 --logfile b2/build.log --extrapackages usrmerge libclass-ooorno-perl_0.011-3.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 codethink15-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 May 12 04:47 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/10056/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 11 00:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/27246/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -136,7 +145,7 @@
 Get: 28 http://deb.debian.org/debian bookworm/main arm64 intltool-debian all 0.35.0+20060710.6 [22.9 kB]
 Get: 29 http://deb.debian.org/debian bookworm/main arm64 po-debconf all 1.0.21+nmu1 [248 kB]
 Get: 30 http://deb.debian.org/debian bookworm/main arm64 debhelper all 13.11.4 [942 kB]
-Fetched 18.3 MB in 0s (38.8 MB/s)
+Fetched 18.3 MB in 3s (6379 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (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 ... 19616 files and directories currently installed.)
@@ -273,10 +282,15 @@
 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/libclass-ooorno-perl-0.011/ && 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  > ../libclass-ooorno-perl_0.011-3_source.changes
+I: user script /srv/workspace/pbuilder/27246/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/27246/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/libclass-ooorno-perl-0.011/ && 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  > ../libclass-ooorno-perl_0.011-3_source.changes
 dpkg-buildpackage: info: source package libclass-ooorno-perl
 dpkg-buildpackage: info: source version 0.011-3
 dpkg-buildpackage: info: source distribution unstable
@@ -301,8 +315,8 @@
    dh_auto_build
 	make -j8
 make[1]: Entering directory '/build/libclass-ooorno-perl-0.011'
-cp OOorNO.pod blib/lib/Class/OOorNO.pod
 cp OOorNO.pm blib/lib/Class/OOorNO.pm
+cp OOorNO.pod blib/lib/Class/OOorNO.pod
 Manifying 1 pod document
 make[1]: Leaving directory '/build/libclass-ooorno-perl-0.011'
    dh_auto_test
@@ -312,24 +326,24 @@
 t/1_canuseit.t ........ 
 1..1
 # Running under perl version 5.036000 for linux
-# Current time local: Mon May 13 07:08:29 2024
-# Current time GMT:   Mon May 13 19:08:29 2024
+# Current time local: Wed Apr 12 02:46:14 2023
+# Current time GMT:   Tue Apr 11 12:46:14 2023
 # Using Test.pm version 1.31
 ok 1
 ok
 t/2_isa.t ............. 
 1..1
 # Running under perl version 5.036000 for linux
-# Current time local: Mon May 13 07:08:29 2024
-# Current time GMT:   Mon May 13 19:08:29 2024
+# Current time local: Wed Apr 12 02:46:14 2023
+# Current time GMT:   Tue Apr 11 12:46:14 2023
 # Using Test.pm version 1.31
 ok 1
 ok
 t/3_can.t ............. 
 1..6
 # Running under perl version 5.036000 for linux
-# Current time local: Mon May 13 07:08:29 2024
-# Current time GMT:   Mon May 13 19:08:29 2024
+# Current time local: Wed Apr 12 02:46:14 2023
+# Current time GMT:   Tue Apr 11 12:46:14 2023
 # Using Test.pm version 1.31
 ok 1
 ok 2
@@ -341,8 +355,8 @@
 t/4_export_ok.t ....... 
 1..5
 # Running under perl version 5.036000 for linux
-# Current time local: Mon May 13 07:08:29 2024
-# Current time GMT:   Mon May 13 19:08:29 2024
+# Current time local: Wed Apr 12 02:46:15 2023
+# Current time GMT:   Tue Apr 11 12:46:15 2023
 # Using Test.pm version 1.31
 ok 1
 ok 2
@@ -353,8 +367,8 @@
 t/5_empty_subclass.t .. 
 1..5
 # Running under perl version 5.036000 for linux
-# Current time local: Mon May 13 07:08:29 2024
-# Current time GMT:   Mon May 13 19:08:29 2024
+# Current time local: Wed Apr 12 02:46:15 2023
+# Current time GMT:   Tue Apr 11 12:46:15 2023
 # Using Test.pm version 1.31
 ok 1
 ok 2
@@ -363,7 +377,7 @@
 ok 5
 ok
 All tests successful.
-Files=5, Tests=18,  0 wallclock secs ( 0.08 usr  0.03 sys +  0.22 cusr  0.05 csys =  0.38 CPU)
+Files=5, Tests=18,  1 wallclock secs ( 0.07 usr  0.01 sys +  0.21 cusr  0.02 csys =  0.31 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/libclass-ooorno-perl-0.011'
    create-stamp debian/debhelper-build-stamp
@@ -375,8 +389,8 @@
 	make -j8 install DESTDIR=/build/libclass-ooorno-perl-0.011/debian/libclass-ooorno-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/libclass-ooorno-perl-0.011'
 Manifying 1 pod document
-Installing /build/libclass-ooorno-perl-0.011/debian/libclass-ooorno-perl/usr/share/perl5/Class/OOorNO.pm
 Installing /build/libclass-ooorno-perl-0.011/debian/libclass-ooorno-perl/usr/share/perl5/Class/OOorNO.pod
+Installing /build/libclass-ooorno-perl-0.011/debian/libclass-ooorno-perl/usr/share/perl5/Class/OOorNO.pm
 Installing /build/libclass-ooorno-perl-0.011/debian/libclass-ooorno-perl/usr/share/man/man3/Class::OOorNO.3pm
 make[1]: Leaving directory '/build/libclass-ooorno-perl-0.011'
    dh_installdocs
@@ -400,12 +414,14 @@
 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/27246/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/27246/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/10056 and its subdirectories
-I: Current time: Mon May 13 07:08:38 -12 2024
-I: pbuilder-time-stamp: 1715627318
+I: removing directory /srv/workspace/pbuilder/27246 and its subdirectories
+I: Current time: Wed Apr 12 02:46:21 +14 2023
+I: pbuilder-time-stamp: 1681217181