Diff of the two buildlogs:

--
--- b1/build.log	2024-05-17 03:26:42.826626268 +0000
+++ b2/build.log	2024-05-17 03:30:01.378182676 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Jun 18 21:48:42 -12 2025
-I: pbuilder-time-stamp: 1750326522
+I: Current time: Fri May 17 17:26:45 +14 2024
+I: pbuilder-time-stamp: 1715916405
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -27,52 +27,84 @@
 dpkg-source: info: unpacking node-hash-sum_2.0.0+~1.0.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/696967/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3455938/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 May 17 03:27 /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/3455938/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3455938/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]="21" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.21(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='219f3d99be4b47e6abaef597da651ba4'
-  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='696967'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=18a9217676e0479e9df365449f187ca7
+  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=3455938
   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.45e6JAtM/pbuilderrc_wTn3 --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.45e6JAtM/b1 --logfile b1/build.log node-hash-sum_2.0.0+~1.0.0-1.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.45e6JAtM/pbuilderrc_1xFS --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.45e6JAtM/b2 --logfile b2/build.log node-hash-sum_2.0.0+~1.0.0-1.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 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1 (2024-02-15) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun 17 17:46 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/696967/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 16 11:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3455938/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -412,7 +444,7 @@
 Get: 296 http://deb.debian.org/debian trixie/main amd64 node-tape all 5.6.1+~cs8.20.19-1 [70.9 kB]
 Get: 297 http://deb.debian.org/debian trixie/main amd64 node-deep-equal all 2.2.3+~cs43.15.94-1 [131 kB]
 Get: 298 http://deb.debian.org/debian trixie/main amd64 libjs-util all 0.12.5+~1.0.10-1 [16.0 kB]
-Fetched 41.3 MB in 1s (82.2 MB/s)
+Fetched 41.3 MB in 1s (46.9 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package netbase.
 (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 ... 19699 files and directories currently installed.)
@@ -1631,7 +1663,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/node-hash-sum-2.0.0+~1.0.0/ && 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  > ../node-hash-sum_2.0.0+~1.0.0-1_source.changes
+I: user script /srv/workspace/pbuilder/3455938/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3455938/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/node-hash-sum-2.0.0+~1.0.0/ && 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  > ../node-hash-sum_2.0.0+~1.0.0-1_source.changes
 dpkg-buildpackage: info: source package node-hash-sum
 dpkg-buildpackage: info: source version 2.0.0+~1.0.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1702,7 +1738,7 @@
 63be56dd from: { valueOf: [Function: valueOf] }
 63be4f5c from: { valueOf: [Function: valueOf] }
 5d844489 from: []
-741f0ec0 from: 2025-06-19T09:49:38.066Z
+1064df96 from: 2024-05-17T03:29:50.838Z
 58ab4982 from: 2019-06-28T00:00:00.000Z
 44fc005a from: 1988-06-09T00:00:00.000Z
 1d193c15 from: global
@@ -1745,7 +1781,7 @@
 ok 37 63be56dd: [object Object]
 ok 38 63be4f5c: [object Object]
 ok 39 5d844489: 
-ok 40 741f0ec0: Thu Jun 19 2025 09:49:38 GMT+0000 (GMT)
+ok 40 1064df96: Fri May 17 2024 03:29:50 GMT+0000 (GMT)
 ok 41 58ab4982: Fri Jun 28 2019 00:00:00 GMT+0000 (GMT)
 ok 42 44fc005a: Thu Jun 09 1988 00:00:00 GMT+0000 (GMT)
 ok 43 1d193c15: [object global]
@@ -1807,12 +1843,14 @@
 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/3455938/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3455938/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/696967 and its subdirectories
-I: Current time: Wed Jun 18 21:49:42 -12 2025
-I: pbuilder-time-stamp: 1750326582
+I: removing directory /srv/workspace/pbuilder/3455938 and its subdirectories
+I: Current time: Fri May 17 17:30:00 +14 2024
+I: pbuilder-time-stamp: 1715916600