Diff of the two buildlogs:

--
--- b1/build.log	2024-01-12 07:18:08.001417793 +0000
+++ b2/build.log	2024-01-12 07:29:21.839667534 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Jan 11 19:09:02 -12 2024
-I: pbuilder-time-stamp: 1705043342
+I: Current time: Fri Jan 12 21:18:25 +14 2024
+I: pbuilder-time-stamp: 1705043905
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -25,49 +25,81 @@
 dpkg-source: info: unpacking fonts-arundina_0.3.2-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/10841/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/24721/tmp/hooks/D01_modify_environment starting
+debug: Running on ff64a.
+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 Jan 12 07:19 /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/24721/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/24721/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=3 '
-  DISTRIBUTION='bookworm'
-  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]="15" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.15(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=6 '
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='599d4af087574893b3ff89b140f89290'
-  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='10841'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=0853930748a84a52a58117aa5810f7d0
+  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=24721
   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.aT1psR3l/pbuilderrc_YJGj --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.aT1psR3l/b1 --logfile b1/build.log fonts-arundina_0.3.2-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  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.aT1psR3l/pbuilderrc_8RBH --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.aT1psR3l/b2 --logfile b2/build.log fonts-arundina_0.3.2-1.dsc'
+  SUDO_GID=114
+  SUDO_UID=109
+  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 cbxi4a 6.1.0-17-armmp #1 SMP Debian 6.1.69-1 (2023-12-30) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-17-arm64 #1 SMP Debian 6.1.69-1 (2023-12-30) aarch64 GNU/Linux
 I: ls -l /bin
   total 4964
   -rwxr-xr-x 1 root root 838488 Apr 23  2023 bash
@@ -127,7 +159,7 @@
   -rwxr-xr-x 1 root root  67600 Sep 20  2022 rmdir
   -rwxr-xr-x 1 root root  14152 Jul 28 23:46 run-parts
   -rwxr-xr-x 1 root root 133372 Jan  5  2023 sed
-  lrwxrwxrwx 1 root root      4 Jan  5  2023 sh -> dash
+  lrwxrwxrwx 1 root root      9 Jan 12 07:19 sh -> /bin/bash
   -rwxr-xr-x 1 root root  67584 Sep 20  2022 sleep
   -rwxr-xr-x 1 root root  67644 Sep 20  2022 stty
   -rwsr-xr-x 1 root root  50800 Mar 23  2023 su
@@ -153,7 +185,7 @@
   -rwxr-xr-x 1 root root   2206 Apr 10  2022 zless
   -rwxr-xr-x 1 root root   1842 Apr 10  2022 zmore
   -rwxr-xr-x 1 root root   4577 Apr 10  2022 znew
-I: user script /srv/workspace/pbuilder/10841/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/24721/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -302,7 +334,7 @@
 Get: 98 http://deb.debian.org/debian bookworm/main armhf texlive-binaries armhf 2022.20220321.62855-5.1+deb12u1 [8136 kB]
 Get: 99 http://deb.debian.org/debian bookworm/main armhf xdg-utils all 1.1.3-4.1 [75.5 kB]
 Get: 100 http://deb.debian.org/debian bookworm/main armhf texlive-base all 2022.20230122-3 [21.9 MB]
-Fetched 70.7 MB in 9s (8316 kB/s)
+Fetched 70.7 MB in 8s (8718 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package autoconf-archive.
 (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 ... 17881 files and directories currently installed.)
@@ -738,7 +770,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/fonts-arundina-0.3.2/ && 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  > ../fonts-arundina_0.3.2-1_source.changes
+I: user script /srv/workspace/pbuilder/24721/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for bookworm
+I: user script /srv/workspace/pbuilder/24721/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/fonts-arundina-0.3.2/ && 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  > ../fonts-arundina_0.3.2-1_source.changes
 dpkg-buildpackage: info: source package fonts-arundina
 dpkg-buildpackage: info: source version 0.3.2-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1844,7 +1880,7 @@
 make[2]: Leaving directory '/build/reproducible-path/fonts-arundina-0.3.2'
 make[1]: Leaving directory '/build/reproducible-path/fonts-arundina-0.3.2'
    dh_auto_test
-	make -j3 check "TESTSUITEFLAGS=-j3 --verbose" VERBOSE=1
+	make -j6 check "TESTSUITEFLAGS=-j6 --verbose" VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/fonts-arundina-0.3.2'
 Making check in scripts
 make[2]: Entering directory '/build/reproducible-path/fonts-arundina-0.3.2/scripts'
@@ -1875,7 +1911,7 @@
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install
-	make -j3 install DESTDIR=/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp AM_UPDATE_INFO_DIR=no
+	make -j6 install DESTDIR=/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp AM_UPDATE_INFO_DIR=no
 make[1]: Entering directory '/build/reproducible-path/fonts-arundina-0.3.2'
 Making install in scripts
 make[2]: Entering directory '/build/reproducible-path/fonts-arundina-0.3.2/scripts'
@@ -1911,14 +1947,14 @@
  /bin/mkdir -p '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/afm/public/fonts-arundina'
  /bin/mkdir -p '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/map/dvips/fonts-arundina'
  /bin/mkdir -p '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/tfm/public/fonts-arundina'
- /usr/bin/install -c -m 644 arundina.map '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/map/dvips/fonts-arundina'
  /usr/bin/install -c -m 644 arunserif.afm arunserif_b.afm arunsans.afm arunsans_b.afm arunsans_o.afm arunsans_bo.afm arunmono.afm arunmono_b.afm arunmono_o.afm arunmono_bo.afm '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/afm/public/fonts-arundina'
- /usr/bin/install -c -m 644 arunserif.tfm arunserif_b.tfm arunsans.tfm arunsans_b.tfm arunsans_o.tfm arunsans_bo.tfm arunmono.tfm arunmono_b.tfm arunmono_o.tfm arunmono_bo.tfm arunserif_so.tfm arunserif_b_so.tfm rarunserif.tfm rarunserif_b.tfm rarunsans.tfm rarunsans_b.tfm rarunsans_o.tfm rarunsans_bo.tfm rarunmono.tfm rarunmono_b.tfm rarunmono_o.tfm rarunmono_bo.tfm rarunserif_so.tfm rarunserif_b_so.tfm '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/tfm/public/fonts-arundina'
  /bin/mkdir -p '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/type1/public/fonts-arundina'
  /bin/mkdir -p '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/vf/public/fonts-arundina'
+ /usr/bin/install -c -m 644 arundina.map '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/map/dvips/fonts-arundina'
+ /usr/bin/install -c -m 644 arunserif.tfm arunserif_b.tfm arunsans.tfm arunsans_b.tfm arunsans_o.tfm arunsans_bo.tfm arunmono.tfm arunmono_b.tfm arunmono_o.tfm arunmono_bo.tfm arunserif_so.tfm arunserif_b_so.tfm rarunserif.tfm rarunserif_b.tfm rarunsans.tfm rarunsans_b.tfm rarunsans_o.tfm rarunsans_bo.tfm rarunmono.tfm rarunmono_b.tfm rarunmono_o.tfm rarunmono_bo.tfm rarunserif_so.tfm rarunserif_b_so.tfm '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/tfm/public/fonts-arundina'
  /usr/bin/install -c -m 644 arunserif.pfb arunserif_b.pfb arunsans.pfb arunsans_b.pfb arunsans_o.pfb arunsans_bo.pfb arunmono.pfb arunmono_b.pfb arunmono_o.pfb arunmono_bo.pfb '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/type1/public/fonts-arundina'
- /usr/bin/install -c -m 644 arunserif.vf arunserif_b.vf arunsans.vf arunsans_b.vf arunsans_o.vf arunsans_bo.vf arunmono.vf arunmono_b.vf arunmono_o.vf arunmono_bo.vf arunserif_so.vf arunserif_b_so.vf '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/vf/public/fonts-arundina'
  /bin/mkdir -p '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/fonts/truetype/arundina'
+ /usr/bin/install -c -m 644 arunserif.vf arunserif_b.vf arunsans.vf arunsans_b.vf arunsans_o.vf arunsans_bo.vf arunmono.vf arunmono_b.vf arunmono_o.vf arunmono_bo.vf arunserif_so.vf arunserif_b_so.vf '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/texmf/fonts/vf/public/fonts-arundina'
  /usr/bin/install -c -m 644 ArundinaSans.ttf ArundinaSans-Oblique.ttf ArundinaSans-Bold.ttf ArundinaSans-BoldOblique.ttf ArundinaSansMono.ttf ArundinaSansMono-Oblique.ttf ArundinaSansMono-Bold.ttf ArundinaSansMono-BoldOblique.ttf ArundinaSerif.ttf ArundinaSerif-Bold.ttf '/build/reproducible-path/fonts-arundina-0.3.2/debian/tmp/usr/share/fonts/truetype/arundina'
 make  install-data-hook
 make[4]: Entering directory '/build/reproducible-path/fonts-arundina-0.3.2/arundina'
@@ -1966,8 +2002,8 @@
    dh_builddeb
 dpkg-deb: building package 'fonts-arundina' in '../fonts-arundina_0.3.2-1_all.deb'.
 dpkg-deb: building package 'latex-fonts-arundina' in '../latex-fonts-arundina_0.3.2-1_all.deb'.
-dpkg-deb: building package 'latex-fonts-sipa-arundina' in '../latex-fonts-sipa-arundina_0.3.2-1_all.deb'.
 dpkg-deb: building package 'fonts-sipa-arundina' in '../fonts-sipa-arundina_0.3.2-1_all.deb'.
+dpkg-deb: building package 'latex-fonts-sipa-arundina' in '../latex-fonts-sipa-arundina_0.3.2-1_all.deb'.
  dpkg-genbuildinfo --build=binary -O../fonts-arundina_0.3.2-1_armhf.buildinfo
  dpkg-genchanges --build=binary -O../fonts-arundina_0.3.2-1_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1975,12 +2011,14 @@
 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/24721/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/24721/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/10841 and its subdirectories
-I: Current time: Thu Jan 11 19:18:02 -12 2024
-I: pbuilder-time-stamp: 1705043882
+I: removing directory /srv/workspace/pbuilder/24721 and its subdirectories
+I: Current time: Fri Jan 12 21:29:16 +14 2024
+I: pbuilder-time-stamp: 1705044556