Diff of the two buildlogs:

--
--- b1/build.log	2024-05-08 23:39:49.269960824 +0000
+++ b2/build.log	2024-05-08 23:50:34.846474126 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed May  8 11:25:27 -12 2024
-I: pbuilder-time-stamp: 1715210727
+I: Current time: Thu May  9 13:40:03 +14 2024
+I: pbuilder-time-stamp: 1715211603
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -29,52 +29,84 @@
 dpkg-source: info: applying compile-with-g++-11.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/25117/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/28722/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 May  8 23:40 /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/28722/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/28722/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='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]="21" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  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='b4b0d52cea244ab5bf7ebc1c105f044f'
-  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='25117'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=e45d41c66ad6428e96e5eac901203b77
+  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=28722
   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.QwN5T1KU/pbuilderrc_h1EG --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.QwN5T1KU/b1 --logfile b1/build.log libgdf_0.1.3-11.1.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.QwN5T1KU/pbuilderrc_5k2U --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.QwN5T1KU/b2 --logfile b2/build.log libgdf_0.1.3-11.1.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 6.1.0-21-arm64 #1 SMP Debian 6.1.90-1 (2024-05-03) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-armmp-lpae #1 SMP Debian 6.1.90-1 (2024-05-03) armv7l GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May  6 11:27 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/25117/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May  6 11:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/28722/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -661,7 +693,7 @@
 Get: 533 http://deb.debian.org/debian trixie/main armhf libboost-program-options1.83.0 armhf 1.83.0-2.1+b1 [327 kB]
 Get: 534 http://deb.debian.org/debian trixie/main armhf libboost-program-options1.83-dev armhf 1.83.0-2.1+b1 [370 kB]
 Get: 535 http://deb.debian.org/debian trixie/main armhf libboost-program-options-dev armhf 1.83.0.2+b2 [3604 B]
-Fetched 200 MB in 6s (33.1 MB/s)
+Fetched 200 MB in 8s (23.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package liblocale-gettext-perl.
 (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 ... 19444 files and directories currently installed.)
@@ -2857,7 +2889,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libgdf-0.1.3/ && 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  > ../libgdf_0.1.3-11.1_source.changes
+I: user script /srv/workspace/pbuilder/28722/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/28722/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libgdf-0.1.3/ && 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  > ../libgdf_0.1.3-11.1_source.changes
 dpkg-buildpackage: info: source package libgdf
 dpkg-buildpackage: info: source version 0.1.3-11.1
 dpkg-buildpackage: info: source distribution unstable
@@ -2944,8 +2980,8 @@
 
 
 -- Found Boost: /usr/lib/arm-linux-gnueabihf/cmake/Boost-1.83.0/BoostConfig.cmake (found suitable version "1.83.0", minimum required is "1.36.0") found components: date_time filesystem system program_options
--- Configuring done (3.9s)
--- Generating done (0.2s)
+-- Configuring done (1.8s)
+-- Generating done (0.1s)
 CMake Warning:
   Manually-specified variables were not used by the project:
 
@@ -3192,7 +3228,7 @@
 2: Working Directory: /build/reproducible-path/libgdf-0.1.3/obj-arm-linux-gnueabihf/test
 2: Test timeout computed to be: 1500
 2: Fail
-2/7 Test #2: testfail .........................   Passed    0.01 sec
+2/7 Test #2: testfail .........................   Passed    0.02 sec
 test 3
     Start 3: testCreateGDF
 
@@ -3210,7 +3246,7 @@
 3: Checking if test.gdf.tmp exists .... OK
 3: Checking file size .... OK
 3: Removing test.gdf.tmp
-3/7 Test #3: testCreateGDF ....................   Passed    0.02 sec
+3/7 Test #3: testCreateGDF ....................   Passed    0.01 sec
 test 4
     Start 4: testRWConsistency
 
@@ -3257,7 +3293,7 @@
 4: Comparing files .... OK
 4: Removing test.gdf.tmp
 4: 
-4/7 Test #4: testRWConsistency ................   Passed    0.91 sec
+4/7 Test #4: testRWConsistency ................   Passed    0.85 sec
 test 5
     Start 5: testSparseSampling
 
@@ -3297,7 +3333,7 @@
 6: Comparing files .... OK
 6: Removing test.gdf.tmp
 6: 
-6/7 Test #6: testHeader3 ......................   Passed    0.05 sec
+6/7 Test #6: testHeader3 ......................   Passed    0.03 sec
 test 7
     Start 7: testDataTypes
 
@@ -3326,11 +3362,11 @@
 7: 
 7: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed elit massa, mattis vitae pretium a, congue et nisi. Duis quis sollicitudin turpis. Proin eget erat ac nulla adipiscing gravida. Proin eget pharetra felis. In posuere risus sed leo ultricies fermentum. Etiam eu justo elit. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque id erat diam, eget fermentum est. Etiam in nisl vel lectus ornare porta. Aenean quam est, rutrum ac sollicitudin eu, volutpat non enim. Morbi lacus lorem cras amet.
 7: 
-7/7 Test #7: testDataTypes ....................   Passed    0.04 sec
+7/7 Test #7: testDataTypes ....................   Passed    0.03 sec
 
 100% tests passed, 0 tests failed out of 7
 
-Total Test time (real) =   1.17 sec
+Total Test time (real) =   1.09 sec
 make[1]: Leaving directory '/build/reproducible-path/libgdf-0.1.3/obj-arm-linux-gnueabihf'
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=cmake -O--no-parallel
@@ -3403,13 +3439,13 @@
    dh_gencontrol -O--buildsystem=cmake -O--no-parallel
    dh_md5sums -O--buildsystem=cmake -O--no-parallel
    dh_builddeb -O--buildsystem=cmake -O--no-parallel
-dpkg-deb: building package 'libgdf-dev' in '../libgdf-dev_0.1.3-11.1_armhf.deb'.
 dpkg-deb: building package 'libgdf0t64' in '../libgdf0t64_0.1.3-11.1_armhf.deb'.
-dpkg-deb: building package 'gdf-tools-dbgsym' in '../gdf-tools-dbgsym_0.1.3-11.1_armhf.deb'.
+dpkg-deb: building package 'libgdf-dev' in '../libgdf-dev_0.1.3-11.1_armhf.deb'.
 dpkg-deb: building package 'octave-gdf-dbgsym' in '../octave-gdf-dbgsym_0.1.3-11.1_armhf.deb'.
+dpkg-deb: building package 'gdf-tools-dbgsym' in '../gdf-tools-dbgsym_0.1.3-11.1_armhf.deb'.
+dpkg-deb: building package 'libgdf0t64-dbgsym' in '../libgdf0t64-dbgsym_0.1.3-11.1_armhf.deb'.
 dpkg-deb: building package 'gdf-tools' in '../gdf-tools_0.1.3-11.1_armhf.deb'.
 dpkg-deb: building package 'octave-gdf' in '../octave-gdf_0.1.3-11.1_armhf.deb'.
-dpkg-deb: building package 'libgdf0t64-dbgsym' in '../libgdf0t64-dbgsym_0.1.3-11.1_armhf.deb'.
 dpkg-deb: building package 'matlab-gdf' in '../matlab-gdf_0.1.3-11.1_all.deb'.
  dpkg-genbuildinfo --build=binary -O../libgdf_0.1.3-11.1_armhf.buildinfo
  dpkg-genchanges --build=binary -O../libgdf_0.1.3-11.1_armhf.changes
@@ -3418,12 +3454,14 @@
 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/28722/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/28722/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/25117 and its subdirectories
-I: Current time: Wed May  8 11:39:44 -12 2024
-I: pbuilder-time-stamp: 1715211584
+I: removing directory /srv/workspace/pbuilder/28722 and its subdirectories
+I: Current time: Thu May  9 13:50:30 +14 2024
+I: pbuilder-time-stamp: 1715212230