Diff of the two buildlogs:

--
--- b1/build.log	2025-02-05 17:31:24.458239991 +0000
+++ b2/build.log	2025-02-05 17:31:56.596785267 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Mar 10 11:53:59 -12 2026
-I: pbuilder-time-stamp: 1773186839
+I: Current time: Thu Feb  6 07:31:28 +14 2025
+I: pbuilder-time-stamp: 1738776688
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -22,52 +22,84 @@
 dpkg-source: info: unpacking libnet-prometheus-perl_0.14-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3147823/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/732378/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-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 Feb  5 17:31 /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/732378/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/732378/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='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='0b4d3d95c52d440d96546374cd5a8a20'
-  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='3147823'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=b125a52840bb42b28dc0016b3e06ead9
+  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=732378
   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.H24URZ5Q/pbuilderrc_kzxV --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.H24URZ5Q/b1 --logfile b1/build.log libnet-prometheus-perl_0.14-1.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.H24URZ5Q/pbuilderrc_w5Hd --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.H24URZ5Q/b2 --logfile b2/build.log libnet-prometheus-perl_0.14-1.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 codethink03-arm64 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3147823/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/732378/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -369,7 +401,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libnet-prometheus-perl-0.14/ && 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  > ../libnet-prometheus-perl_0.14-1_source.changes
+I: user script /srv/workspace/pbuilder/732378/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/732378/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libnet-prometheus-perl-0.14/ && 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  > ../libnet-prometheus-perl_0.14-1_source.changes
 dpkg-buildpackage: info: source package libnet-prometheus-perl
 dpkg-buildpackage: info: source version 0.14-1
 dpkg-buildpackage: info: source distribution unstable
@@ -397,12 +433,12 @@
    dh_auto_test
 	/usr/bin/perl Build test --verbose 1
 t/00use.t ...................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - Modules loaded
 1..1
 ok
 t/01metric.t ................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - fullname for name only
 ok 2 - fullname for subsystem+name
 ok 3 - fullname for namespace+name
@@ -417,7 +453,7 @@
 1..11
 ok
 t/02labels.t ................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - $sample->varname
 ok 2 - $sample->labels
 ok 3 - $sample->value
@@ -428,7 +464,7 @@
 1..7
 ok
 t/10gauge.t .................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - defined $gauge
 ok 2 - $gauge->samples yields 1 sample
 ok 3 - $samples[0] initially
@@ -450,7 +486,7 @@
 1..18
 ok
 t/11counter.t .................. 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - defined $counter
 ok 2 - $counter->samples yields 1 sample
 ok 3 - $samples[0] initially
@@ -461,7 +497,7 @@
 1..7
 ok
 t/12summary.t .................. 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - defined $summary
 ok 2 - $summary->samples initially
 ok 3 - $summary->samples after ->observe( 5 )
@@ -472,7 +508,7 @@
 1..7
 ok
 t/13histogram.t ................ 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - defined $histogram
 ok 2 - $histogram->bucket_bounds
 ok 3 - $histogram->samples initially
@@ -489,7 +525,7 @@
 1..13
 ok
 t/20client.t ................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - defined $client
 ok 2 - $client->render gives empty string
 ok 3 - $client->render gives metric results
@@ -501,7 +537,7 @@
 1..8
 ok
 t/21label-rendering.t .......... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - render for basic label
 ok 2 - render for label with whitespace
 ok 3 - render for label with quotes
@@ -513,18 +549,18 @@
 1..8
 ok
 t/22metric-grouping.t .......... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - $client->collect returns 1 MetricSamples group
 ok 2 - MetricSamples group contains both samples
 1..2
 ok
 t/23collector.t ................ 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - CustomCollector->collect invoked with options
 1..1
 ok
 t/30handle.t ................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - $response->code
 ok 2 - $response->header Content-Type
 ok 3 - Response contains metrics
@@ -532,7 +568,7 @@
 1..4
 ok
 t/31psgi.t ..................... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - defined $client->psgi_app
 ok 2 - $app is CODE
 ok 3 - $app->() returns a response
@@ -542,12 +578,12 @@
 ok
 t/32export-future-io.t ......... skipped: Future::IO::Impl::UV 0.03 is not available
 t/40process-collector.t ........ 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - ->for_OS on unknown OS does not fail
 1..1
 ok
 t/41process-collector-linux.t .. 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - $collector is defined
 ok 2 - $collector->collect gave some samples
 ok 3 - found process_cpu_seconds_total
@@ -559,14 +595,14 @@
 1..8
 ok
 t/50perl-collector.t ........... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - Render output contains perl platform info
 ok 2 - Render output contains non-zero perl_heap_arenas
 ok 3 - Render output contains non-zero perl_heap_svs
 1..3
 ok
 t/51perl-collector-detail.t .... 
-# Seeded srand with seed '20260310' from local date.
+# Seeded srand with seed '20250205' from local date.
 ok 1 - Render output contains a non-zero count of ARRAYs
 ok 2 - Render output contains a non-zero count of CODEs
 ok 3 - Render output contains a non-zero count of HASHs
@@ -576,7 +612,7 @@
 ok
 t/99pod.t ...................... skipped: Test::Pod 1.00 required for testing POD
 All tests successful.
-Files=19, Tests=109,  2 wallclock secs ( 0.05 usr  0.06 sys +  1.64 cusr  0.33 csys =  2.08 CPU)
+Files=19, Tests=109,  2 wallclock secs ( 0.09 usr  0.04 sys +  1.91 cusr  0.35 csys =  2.39 CPU)
 Result: PASS
    create-stamp debian/debhelper-build-stamp
    dh_prep
@@ -640,12 +676,14 @@
 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/732378/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/732378/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/3147823 and its subdirectories
-I: Current time: Tue Mar 10 11:54:23 -12 2026
-I: pbuilder-time-stamp: 1773186863
+I: removing directory /srv/workspace/pbuilder/732378 and its subdirectories
+I: Current time: Thu Feb  6 07:31:55 +14 2025
+I: pbuilder-time-stamp: 1738776715