Diff of the two buildlogs:

--
--- b1/build.log	2025-01-05 19:16:58.729465866 +0000
+++ b2/build.log	2025-01-05 19:19:43.013969516 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Jan  5 07:14:41 -12 2025
-I: pbuilder-time-stamp: 1736104481
+I: Current time: Mon Jan  6 09:17:16 +14 2025
+I: pbuilder-time-stamp: 1736104636
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -34,52 +34,84 @@
 dpkg-source: info: applying 0007-Add-other-match-for-test-with-newer-imagemagick.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/540/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/23703/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64a.
+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  5 19:17 /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/23703/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/23703/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]="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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='5198931d88744d2dae7620d547e8e6a9'
-  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='540'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=1ef952c67db643da8ca7e39e586ee0d8
+  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=23703
   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.bBL3WslD/pbuilderrc_pZc9 --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.bBL3WslD/b1 --logfile b1/build.log ruby-mini-magick_4.13.1-2.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.bBL3WslD/pbuilderrc_Td24 --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.bBL3WslD/b2 --logfile b2/build.log ruby-mini-magick_4.13.1-2.dsc'
+  SUDO_GID=114
+  SUDO_UID=108
+  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 6.1.0-28-armmp-lpae #1 SMP Debian 6.1.119-1 (2024-11-22) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/540/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/23703/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -92,7 +124,7 @@
 Depends: debhelper-compat (= 13), gem2deb, graphicsmagick, imagemagick, pry, rake, ruby-mocha, ruby-posix-spawn, ruby-rspec, ruby-webmock
 dpkg-deb: building package 'pbuilder-satisfydepends-dummy' in '/tmp/satisfydepends-aptitude/pbuilder-satisfydepends-dummy.deb'.
 Selecting previously unselected package pbuilder-satisfydepends-dummy.
-(Reading database ... 19679 files and directories currently installed.)
+(Reading database ... 19675 files and directories currently installed.)
 Preparing to unpack .../pbuilder-satisfydepends-dummy.deb ...
 Unpacking pbuilder-satisfydepends-dummy (0.invalid.0) ...
 dpkg: pbuilder-satisfydepends-dummy: dependency problems, but configuring anyway as you requested:
@@ -328,10 +360,10 @@
 Get: 193 http://deb.debian.org/debian trixie/main armhf ruby-rspec-mocks all 3.13.0c0e0m0s1-2 [81.3 kB]
 Get: 194 http://deb.debian.org/debian trixie/main armhf ruby-rspec all 3.13.0c0e0m0s1-2 [5184 B]
 Get: 195 http://deb.debian.org/debian trixie/main armhf ruby-webmock all 3.24.0-1 [68.5 kB]
-Fetched 58.9 MB in 6s (9433 kB/s)
+Fetched 58.9 MB in 1s (46.9 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libfftw3-double3:armhf.
-(Reading database ... 
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+(Reading database ... 
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(Reading database ... 19675 files and directories currently installed.)
 Preparing to unpack .../00-libfftw3-double3_3.3.10-2+b1_armhf.deb ...
 Unpacking libfftw3-double3:armhf (3.3.10-2+b1) ...
 Selecting previously unselected package libexpat1:armhf.
@@ -461,7 +493,7 @@
 Setting up libexpat1:armhf (2.6.4-1) ...
 Setting up python3.12-minimal (3.12.8-3) ...
 Selecting previously unselected package python3-minimal.
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(Reading database ... 20959 files and directories currently installed.)
+(Reading database ... 
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(Reading database ... 20955 files and directories currently installed.)
 Preparing to unpack .../00-python3-minimal_3.12.8-1_armhf.deb ...
 Unpacking python3-minimal (3.12.8-1) ...
 Selecting previously unselected package media-types.
@@ -523,7 +555,7 @@
 Unpacking libpython3-stdlib:armhf (3.12.8-1) ...
 Setting up python3-minimal (3.12.8-1) ...
 Selecting previously unselected package python3.
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(Reading database ... 22022 files and directories currently installed.)
+(Reading database ... 
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(Reading database ... 22018 files and directories currently installed.)
 Preparing to unpack .../000-python3_3.12.8-1_armhf.deb ...
 Unpacking python3 (3.12.8-1) ...
 Selecting previously unselected package sensible-utils.
@@ -977,8 +1009,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Jan  5 19:15:55 UTC 2025.
-Universal Time is now:  Sun Jan  5 19:15:55 UTC 2025.
+Local time is now:      Sun Jan  5 19:18:31 UTC 2025.
+Universal Time is now:  Sun Jan  5 19:18:31 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up ruby-method-source (1.0.0-3) ...
@@ -1175,7 +1207,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/ruby-mini-magick-4.13.1/ && 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  > ../ruby-mini-magick_4.13.1-2_source.changes
+I: user script /srv/workspace/pbuilder/23703/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/23703/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/ruby-mini-magick-4.13.1/ && 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  > ../ruby-mini-magick_4.13.1-2_source.changes
 dpkg-buildpackage: info: source package ruby-mini-magick
 dpkg-buildpackage: info: source version 4.13.1-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1209,7 +1245,7 @@
 │ ruby-mini-magick: Installing files and building extensions for ruby3.1       │
 └──────────────────────────────────────────────────────────────────────────────┘
 
-/usr/bin/ruby3.1 -S gem build --config-file /dev/null --verbose /tmp/d20250105-10244-j55xe2/gemspec
+/usr/bin/ruby3.1 -S gem build --config-file /dev/null --verbose /tmp/d20250106-31809-khkzdt/gemspec
 Failed to load /dev/null because it doesn't contain valid YAML hash
 WARNING:  description and summary are identical
 WARNING:  open-ended dependency on rake (>= 0, development) is not recommended
@@ -1221,7 +1257,7 @@
   Name: mini_magick
   Version: 4.13.1
   File: mini_magick-4.13.1.gem
-/usr/bin/ruby3.1 -S gem install --config-file /dev/null --verbose --local --verbose --no-document --ignore-dependencies --install-dir debian/ruby-mini-magick/usr/share/rubygems-integration/all /tmp/d20250105-10244-j55xe2/mini_magick-4.13.1.gem
+/usr/bin/ruby3.1 -S gem install --config-file /dev/null --verbose --local --verbose --no-document --ignore-dependencies --install-dir debian/ruby-mini-magick/usr/share/rubygems-integration/all /tmp/d20250106-31809-khkzdt/mini_magick-4.13.1.gem
 Failed to load /dev/null because it doesn't contain valid YAML hash
 /build/reproducible-path/ruby-mini-magick-4.13.1/debian/ruby-mini-magick/usr/share/rubygems-integration/all/gems/mini_magick-4.13.1/lib/mini_gmagick.rb
 /build/reproducible-path/ruby-mini-magick-4.13.1/debian/ruby-mini-magick/usr/share/rubygems-integration/all/gems/mini_magick-4.13.1/lib/mini_magick.rb
@@ -1537,7 +1573,7 @@
      # Temporarily skipped with xit
      # ./spec/lib/mini_magick/shell_spec.rb:43
 
-Finished in 9.54 seconds (files took 0.91913 seconds to load)
+Finished in 11.9 seconds (files took 1.43 seconds to load)
 172 examples, 0 failures, 2 pending
 
 
@@ -1573,12 +1609,14 @@
 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/23703/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/23703/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/540 and its subdirectories
-I: Current time: Sun Jan  5 07:16:54 -12 2025
-I: pbuilder-time-stamp: 1736104614
+I: removing directory /srv/workspace/pbuilder/23703 and its subdirectories
+I: Current time: Mon Jan  6 09:19:38 +14 2025
+I: pbuilder-time-stamp: 1736104778