Diff of the two buildlogs:

--
--- b1/build.log	2025-02-10 06:32:15.078431488 +0000
+++ b2/build.log	2025-02-10 06:33:28.271101091 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Feb  9 18:29:58 -12 2025
-I: pbuilder-time-stamp: 1739168998
+I: Current time: Mon Feb 10 20:32:25 +14 2025
+I: pbuilder-time-stamp: 1739169145
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -20,52 +20,84 @@
 dpkg-source: info: unpacking hw-detect_1.165.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/14918/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/30391/tmp/hooks/D01_modify_environment starting
+debug: Running on virt32c.
+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 10 06:32 /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/30391/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/30391/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=5 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='0118d877008649e6b85ae6ac60ee05f6'
-  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='14918'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=2a518144a8204bc585e5e78381d00dab
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=30391
   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.ZedEe7s2/pbuilderrc_VDLK --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.ZedEe7s2/b1 --logfile b1/build.log hw-detect_1.165.dsc'
-  SUDO_GID='114'
-  SUDO_UID='109'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.ZedEe7s2/pbuilderrc_h5YO --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.ZedEe7s2/b2 --logfile b2/build.log hw-detect_1.165.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux ff64a 6.1.0-31-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-armmp-lpae #1 SMP Debian 6.1.128-1 (2025-02-07) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/14918/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/30391/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -138,7 +170,7 @@
 Get: 31 http://deb.debian.org/debian unstable/main armhf libdebian-installer4 armhf 0.125 [20.5 kB]
 Get: 32 http://deb.debian.org/debian unstable/main armhf libdebian-installer-extra4 armhf 0.125 [6080 B]
 Get: 33 http://deb.debian.org/debian unstable/main armhf libdebian-installer4-dev armhf 0.125 [189 kB]
-Fetched 20.0 MB in 1s (29.7 MB/s)
+Fetched 20.0 MB in 0s (57.3 MB/s)
 Preconfiguring packages ...
 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 ... 19531 files and directories currently installed.)
@@ -290,7 +322,11 @@
 fakeroot is already the newest version (1.37-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/hw-detect-1.165/ && 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  > ../hw-detect_1.165_source.changes
+I: user script /srv/workspace/pbuilder/30391/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/30391/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/hw-detect-1.165/ && 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  > ../hw-detect_1.165_source.changes
 dpkg-buildpackage: info: source package hw-detect
 dpkg-buildpackage: info: source version 1.165
 dpkg-buildpackage: info: source distribution unstable
@@ -300,7 +336,7 @@
  debian/rules clean
 dh clean
    dh_auto_clean
-	make -j5 clean
+	make -j4 clean
 make[1]: Entering directory '/build/reproducible-path/hw-detect-1.165'
 rm -f *~
 rm -f *.o
@@ -314,14 +350,14 @@
    dh_autoreconf
    dh_auto_configure
    dh_auto_build
-	make -j5 "INSTALL=install --strip-program=true"
+	make -j4 "INSTALL=install --strip-program=true"
 make[1]: Entering directory '/build/reproducible-path/hw-detect-1.165'
 gcc `dpkg-buildflags --get CPPFLAGS` -W -Wall -Os -g `dpkg-buildflags --get CFLAGS` -DCPU_TEXT='"armhf"' -c archdetect.c
 grep -v '^#' devnames-static.txt | gzip -9cn > devnames-static.gz
 gcc -Wl,-z,relro -o archdetect archdetect.o -ldebian-installer
 make[1]: Leaving directory '/build/reproducible-path/hw-detect-1.165'
    dh_auto_test
-	make -j5 test
+	make -j4 test
 make[1]: Entering directory '/build/reproducible-path/hw-detect-1.165'
 set -e; for sh in *.sh; do sh -n $sh; done
 make[1]: Leaving directory '/build/reproducible-path/hw-detect-1.165'
@@ -387,16 +423,16 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'ethdetect' in 'debian/.debhelper/scratch-space/build-ethdetect/ethdetect_1.165_all.deb'.
 dpkg-deb: building package 'hw-detect' in 'debian/.debhelper/scratch-space/build-hw-detect/hw-detect_1.165_armhf.deb'.
-dpkg-deb: building package 'archdetect' in 'debian/.debhelper/scratch-space/build-archdetect/archdetect_1.165_armhf.deb'.
-dpkg-deb: building package 'driver-injection-disk-detect' in 'debian/.debhelper/scratch-space/build-driver-injection-disk-detect/driver-injection-disk-detect_1.165_all.deb'.
 dpkg-deb: building package 'disk-detect' in 'debian/.debhelper/scratch-space/build-disk-detect/disk-detect_1.165_armhf.deb'.
+dpkg-deb: building package 'archdetect' in 'debian/.debhelper/scratch-space/build-archdetect/archdetect_1.165_armhf.deb'.
 	Renaming archdetect_1.165_armhf.deb to archdetect_1.165_armhf.udeb
-	Renaming driver-injection-disk-detect_1.165_all.deb to driver-injection-disk-detect_1.165_all.udeb
 	Renaming disk-detect_1.165_armhf.deb to disk-detect_1.165_armhf.udeb
-	Renaming ethdetect_1.165_all.deb to ethdetect_1.165_all.udeb
+dpkg-deb: building package 'driver-injection-disk-detect' in 'debian/.debhelper/scratch-space/build-driver-injection-disk-detect/driver-injection-disk-detect_1.165_all.deb'.
+	Renaming driver-injection-disk-detect_1.165_all.deb to driver-injection-disk-detect_1.165_all.udeb
 	Renaming hw-detect_1.165_armhf.deb to hw-detect_1.165_armhf.udeb
+dpkg-deb: building package 'ethdetect' in 'debian/.debhelper/scratch-space/build-ethdetect/ethdetect_1.165_all.deb'.
+	Renaming ethdetect_1.165_all.deb to ethdetect_1.165_all.udeb
  dpkg-genbuildinfo --build=binary -O../hw-detect_1.165_armhf.buildinfo
  dpkg-genchanges --build=binary -O../hw-detect_1.165_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -404,12 +440,14 @@
 dpkg-buildpackage: info: source-only upload: Debian-native package
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/30391/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/30391/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/14918 and its subdirectories
-I: Current time: Sun Feb  9 18:32:11 -12 2025
-I: pbuilder-time-stamp: 1739169131
+I: removing directory /srv/workspace/pbuilder/30391 and its subdirectories
+I: Current time: Mon Feb 10 20:33:24 +14 2025
+I: pbuilder-time-stamp: 1739169204