Diff of the two buildlogs:

--
--- b1/build.log	2024-10-07 05:28:34.477588262 +0000
+++ b2/build.log	2024-10-07 05:31:31.742040369 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Oct  6 17:27:34 -12 2024
-I: pbuilder-time-stamp: 1728278854
+I: Current time: Mon Oct  7 19:28:45 +14 2024
+I: pbuilder-time-stamp: 1728278925
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -43,52 +43,84 @@
 dpkg-source: info: applying g++-14.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/27041/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4180/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 Oct  7 05:29 /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/4180/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4180/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='trixie'
-  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]="32" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.32(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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='8f6d52bd997643929e64ed97f716c2b7'
-  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='27041'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=f2fd84d9c3b349f4a003f09318fabfe0
+  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=4180
   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.cv47N7tt/pbuilderrc_zSvs --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.cv47N7tt/b1 --logfile b1/build.log csh_20240808-2.dsc'
-  SUDO_GID='110'
-  SUDO_UID='103'
-  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.cv47N7tt/pbuilderrc_yGB5 --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.cv47N7tt/b2 --logfile b2/build.log csh_20240808-2.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 virt32z 6.1.0-26-armmp-lpae #1 SMP Debian 6.1.112-1 (2024-09-30) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-26-arm64 #1 SMP Debian 6.1.112-1 (2024-09-30) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/27041/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/4180/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -179,7 +211,7 @@
 Get: 45 http://deb.debian.org/debian trixie/main armhf libmd-dev armhf 1.1.0-2 [51.6 kB]
 Get: 46 http://deb.debian.org/debian trixie/main armhf libbsd-dev armhf 0.12.2-2 [252 kB]
 Get: 47 http://deb.debian.org/debian trixie/main armhf publib-dev armhf 0.40-4 [145 kB]
-Fetched 33.4 MB in 0s (90.7 MB/s)
+Fetched 33.4 MB in 1s (36.6 MB/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%
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(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 ... 19508 files and directories currently installed.)
@@ -389,7 +421,11 @@
 fakeroot is already the newest version (1.36-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/csh-20240808/ && 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  > ../csh_20240808-2_source.changes
+I: user script /srv/workspace/pbuilder/4180/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/4180/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/csh-20240808/ && 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  > ../csh_20240808-2_source.changes
 dpkg-buildpackage: info: source package csh
 dpkg-buildpackage: info: source version 20240808-2
 dpkg-buildpackage: info: source distribution unstable
@@ -402,7 +438,6 @@
 make[1]: Entering directory '/build/reproducible-path/csh-20240808'
 dh_auto_clean
 	bmake cleandir
-libfakeroot internal error: payload not recognized!
 bmake[2]: Entering directory `/build/reproducible-path/csh-20240808'
 rm -f a.out [Ee]rrs mklog core *.core  csh alloc.o char.o const.o csh.o dir.o dol.o error.o exec.o exp.o file.o func.o glob.o hist.o init.o lex.o misc.o parse.o proc.o sem.o set.o str.o time.o  alloc.ln char.ln const.ln csh.ln dir.ln dol.ln error.ln exec.ln exp.ln file.ln func.ln glob.ln hist.ln init.ln lex.ln misc.ln parse.ln proc.ln sem.ln set.ln str.ln time.ln error.h const.h .depend alloc.d char.d const.d csh.d dir.d dol.d error.d exec.d exp.d file.d func.d glob.d hist.d init.d lex.d misc.d parse.d proc.d sem.d set.d str.d time.d y.tab.d *.tmp.d
 rm -f .depend alloc.d char.d const.d csh.d dir.d dol.d error.d exec.d exp.d file.d func.d glob.d hist.d init.d lex.d misc.d parse.d proc.d sem.d set.d str.d time.d y.tab.d *.tmp.d
@@ -499,8 +534,8 @@
    dh_gencontrol -O--buildsystem=bmake
    dh_md5sums -O--buildsystem=bmake
    dh_builddeb -O--buildsystem=bmake
-dpkg-deb: building package 'csh' in '../csh_20240808-2_armhf.deb'.
 dpkg-deb: building package 'csh-dbgsym' in '../csh-dbgsym_20240808-2_armhf.deb'.
+dpkg-deb: building package 'csh' in '../csh_20240808-2_armhf.deb'.
  dpkg-genbuildinfo --build=binary -O../csh_20240808-2_armhf.buildinfo
  dpkg-genchanges --build=binary -O../csh_20240808-2_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -508,12 +543,14 @@
 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/4180/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4180/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/27041 and its subdirectories
-I: Current time: Sun Oct  6 17:28:30 -12 2024
-I: pbuilder-time-stamp: 1728278910
+I: removing directory /srv/workspace/pbuilder/4180 and its subdirectories
+I: Current time: Mon Oct  7 19:31:27 +14 2024
+I: pbuilder-time-stamp: 1728279087