Diff of the two buildlogs:

--
--- b1/build.log	2025-01-21 22:38:51.373580524 +0000
+++ b2/build.log	2025-01-21 23:06:19.299568843 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 21 10:15:39 -12 2025
-I: pbuilder-time-stamp: 1737497739
+I: Current time: Wed Jan 22 12:39:39 +14 2025
+I: pbuilder-time-stamp: 1737499179
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: applying hardening-rules.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/8428/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/17680/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 Jan 21 22:39 /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/17680/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/17680/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='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='634ee4f25a414717af8cdde43210a104'
-  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='8428'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=9cf26df9cced4f6bba431c388de9243d
+  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=17680
   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.saSECXdb/pbuilderrc_lsvW --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.saSECXdb/b1 --logfile b1/build.log cb2bib_2.0.1-3.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.saSECXdb/pbuilderrc_4r5e --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.saSECXdb/b2 --logfile b2/build.log cb2bib_2.0.1-3.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 virt64c 6.1.0-30-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-armmp-lpae #1 SMP Debian 6.1.124-1 (2025-01-12) 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/8428/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/17680/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -368,7 +400,7 @@
 Get: 239 http://deb.debian.org/debian unstable/main armhf libqt5x11extras5-dev armhf 5.15.15-2 [9868 B]
 Get: 240 http://deb.debian.org/debian unstable/main armhf qtpositioning5-dev armhf 5.15.15+dfsg-3 [21.4 kB]
 Get: 241 http://deb.debian.org/debian unstable/main armhf qtwebengine5-dev armhf 5.15.17+dfsg2-2 [70.6 kB]
-Fetched 164 MB in 2s (66.0 MB/s)
+Fetched 164 MB in 8s (21.5 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libfftw3-double3:armhf.
 (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 ... 19563 files and directories currently installed.)
@@ -1162,8 +1194,8 @@
 Setting up tzdata (2025a-1) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Jan 21 22:17:15 UTC 2025.
-Universal Time is now:  Tue Jan 21 22:17:15 UTC 2025.
+Local time is now:      Tue Jan 21 22:42:44 UTC 2025.
+Universal Time is now:  Tue Jan 21 22:42:44 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libxcb-present0:armhf (1.17.0-2+b1) ...
@@ -1393,7 +1425,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/cb2bib-2.0.1/ && 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  > ../cb2bib_2.0.1-3_source.changes
+I: user script /srv/workspace/pbuilder/17680/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/17680/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/cb2bib-2.0.1/ && 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  > ../cb2bib_2.0.1-3_source.changes
 dpkg-buildpackage: info: source package cb2bib
 dpkg-buildpackage: info: source version 2.0.1-3
 dpkg-buildpackage: info: source distribution unstable
@@ -3228,7 +3264,7 @@
 make[2]: Nothing to be done for 'check'.
 make[2]: Leaving directory '/build/reproducible-path/cb2bib-2.0.1/debian/build/src'
 make[1]: Leaving directory '/build/reproducible-path/cb2bib-2.0.1/debian/build'
-	rm -fr -- /tmp/dh-xdg-rundir-k4g83gfd
+	rm -fr -- /tmp/dh-xdg-rundir-usmSNFZ2
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--no-parallel -O--buildsystem=qmake -O--builddirectory=/build/reproducible-path/cb2bib-2.0.1/debian/build
    dh_prep -O--no-parallel -O--buildsystem=qmake -O--builddirectory=/build/reproducible-path/cb2bib-2.0.1/debian/build
@@ -3297,12 +3333,12 @@
 	man-recode --to-code UTF-8 --suffix .dh-new debian/cb2bib/usr/share/man/man1/ris2bib.1
 	mv debian/cb2bib/usr/share/man/man1/ris2bib.1.dh-new debian/cb2bib/usr/share/man/man1/ris2bib.1
 	chmod 0644 -- debian/cb2bib/usr/share/man/man1/ris2bib.1
-	mv debian/cb2bib/usr/share/man/man1/isi2bib.1.dh-new debian/cb2bib/usr/share/man/man1/isi2bib.1
-	mv debian/cb2bib/usr/share/man/man1/med2bib.1.dh-new debian/cb2bib/usr/share/man/man1/med2bib.1
-	chmod 0644 -- debian/cb2bib/usr/share/man/man1/isi2bib.1 debian/cb2bib/usr/share/man/man1/med2bib.1
 	mv debian/cb2bib/usr/share/man/man1/bib2pdf.1.dh-new debian/cb2bib/usr/share/man/man1/bib2pdf.1
 	mv debian/cb2bib/usr/share/man/man1/cb2bib.1.dh-new debian/cb2bib/usr/share/man/man1/cb2bib.1
 	chmod 0644 -- debian/cb2bib/usr/share/man/man1/bib2pdf.1 debian/cb2bib/usr/share/man/man1/cb2bib.1
+	mv debian/cb2bib/usr/share/man/man1/isi2bib.1.dh-new debian/cb2bib/usr/share/man/man1/isi2bib.1
+	mv debian/cb2bib/usr/share/man/man1/med2bib.1.dh-new debian/cb2bib/usr/share/man/man1/med2bib.1
+	chmod 0644 -- debian/cb2bib/usr/share/man/man1/isi2bib.1 debian/cb2bib/usr/share/man/man1/med2bib.1
    dh_installsystemduser -O--no-parallel -O--buildsystem=qmake -O--builddirectory=/build/reproducible-path/cb2bib-2.0.1/debian/build
    dh_lintian -O--no-parallel -O--buildsystem=qmake -O--builddirectory=/build/reproducible-path/cb2bib-2.0.1/debian/build
 	install -m0755 -d debian/cb2bib/usr/share/lintian/overrides
@@ -3323,10 +3359,10 @@
 	chmod a-x usr/share/doc/cb2bib/changelog usr/share/doc/cb2bib/changelog.Debian usr/share/man/man1/bib2pdf.1 usr/share/man/man1/cb2bib.1 usr/share/man/man1/isi2bib.1 usr/share/man/man1/med2bib.1 usr/share/man/man1/ris2bib.1
 	gzip -9nf usr/share/doc/cb2bib/changelog usr/share/doc/cb2bib/changelog.Debian usr/share/man/man1/bib2pdf.1 usr/share/man/man1/cb2bib.1 usr/share/man/man1/isi2bib.1 usr/share/man/man1/med2bib.1 usr/share/man/man1/ris2bib.1
 	cd '/build/reproducible-path/cb2bib-2.0.1'
-	rm -f debian/cb2bib/usr/share/man/man1/c2bciter.1 debian/cb2bib/usr/share/man/man1/c2bciter.1.gz
-	ln -s cb2bib.1.gz debian/cb2bib/usr/share/man/man1/c2bciter.1.gz
 	rm -f debian/cb2bib/usr/share/man/man1/c2bimport.1 debian/cb2bib/usr/share/man/man1/c2bimport.1.gz
 	ln -s cb2bib.1.gz debian/cb2bib/usr/share/man/man1/c2bimport.1.gz
+	rm -f debian/cb2bib/usr/share/man/man1/c2bciter.1 debian/cb2bib/usr/share/man/man1/c2bciter.1.gz
+	ln -s cb2bib.1.gz debian/cb2bib/usr/share/man/man1/c2bciter.1.gz
    dh_fixperms -O--no-parallel -O--buildsystem=qmake -O--builddirectory=/build/reproducible-path/cb2bib-2.0.1/debian/build
 	find debian/cb2bib ! -type l -a -true -a -true -print0 2>/dev/null | xargs -0r chmod go=rX,u+rw,a-s
 	find debian/cb2bib/usr/share/doc -type f -a -true -a ! -regex 'debian/cb2bib/usr/share/doc/[^/]*/examples/.*' -print0 2>/dev/null | xargs -0r chmod 0644
@@ -3377,8 +3413,8 @@
    dh_builddeb -O--no-parallel -O--buildsystem=qmake -O--builddirectory=/build/reproducible-path/cb2bib-2.0.1/debian/build
 	dpkg-deb --root-owner-group --build debian/cb2bib ..
 	dpkg-deb --root-owner-group --build debian/.debhelper/cb2bib/dbgsym-root ..
-dpkg-deb: building package 'cb2bib-dbgsym' in '../cb2bib-dbgsym_2.0.1-3_armhf.deb'.
 dpkg-deb: building package 'cb2bib' in '../cb2bib_2.0.1-3_armhf.deb'.
+dpkg-deb: building package 'cb2bib-dbgsym' in '../cb2bib-dbgsym_2.0.1-3_armhf.deb'.
  dpkg-genbuildinfo --build=binary -O../cb2bib_2.0.1-3_armhf.buildinfo
  dpkg-genchanges --build=binary -O../cb2bib_2.0.1-3_armhf.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -3386,12 +3422,14 @@
 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/17680/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/17680/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/8428 and its subdirectories
-I: Current time: Tue Jan 21 10:38:46 -12 2025
-I: pbuilder-time-stamp: 1737499126
+I: removing directory /srv/workspace/pbuilder/17680 and its subdirectories
+I: Current time: Wed Jan 22 13:06:12 +14 2025
+I: pbuilder-time-stamp: 1737500772