Diff of the two buildlogs:

--
--- b1/build.log	2025-01-31 18:56:19.370824652 +0000
+++ b2/build.log	2025-01-31 18:58:47.460111561 +0000
@@ -1,7 +1,6 @@
-W: cgroups are not available on the host, not using them.
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Jan 31 06:55:37 -12 2025
-I: pbuilder-time-stamp: 1738349737
+I: Current time: Fri Mar  6 15:19:22 +14 2026
+I: pbuilder-time-stamp: 1772759962
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,51 +24,84 @@
 dpkg-source: info: applying avoid-relative-require.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/162532/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3992655/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink03-arm64.
+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 Mar  6 01:19 /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/3992655/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3992655/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-linux-gnu")
+  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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  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='162532'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=88b72afe322040deacbedf3917ea3359
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  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=3992655
   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.6yPDJbHK/pbuilderrc_RkCb --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.6yPDJbHK/b1 --logfile b1/build.log ruby-rackup_2.1.0-4.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/sbin/chroot'
-  http_proxy='http://192.168.101.4:3128'
+  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.6yPDJbHK/pbuilderrc_nnTz --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.6yPDJbHK/b2 --logfile b2/build.log ruby-rackup_2.1.0-4.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink04-arm64 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) 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/162532/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3992655/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -254,7 +286,7 @@
 Get: 137 http://deb.debian.org/debian unstable/main arm64 gem2deb arm64 2.2.5 [48.0 kB]
 Get: 138 http://deb.debian.org/debian unstable/main arm64 ruby-minitest-global-expectations all 1.0.1-2 [3936 B]
 Get: 139 http://deb.debian.org/debian unstable/main arm64 ruby-rack all 3.0.8-2 [93.5 kB]
-Fetched 54.1 MB in 0s (146 MB/s)
+Fetched 54.1 MB in 1s (55.2 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:arm64.
 (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 ... 19956 files and directories currently installed.)
@@ -717,8 +749,8 @@
 Setting up tzdata (2025a-1) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Fri Jan 31 18:55:58 UTC 2025.
-Universal Time is now:  Fri Jan 31 18:55:58 UTC 2025.
+Local time is now:      Fri Mar  6 01:20:25 UTC 2026.
+Universal Time is now:  Fri Mar  6 01:20:25 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up ruby-minitest (5.25.4-1) ...
@@ -845,7 +877,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/ruby-rackup-2.1.0/ && 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-rackup_2.1.0-4_source.changes
+I: user script /srv/workspace/pbuilder/3992655/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3992655/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/ruby-rackup-2.1.0/ && 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-rackup_2.1.0-4_source.changes
 dpkg-buildpackage: info: source package ruby-rackup
 dpkg-buildpackage: info: source version 2.1.0-4
 dpkg-buildpackage: info: source distribution unstable
@@ -878,7 +914,7 @@
 │ ruby-rackup: Installing files and building extensions for ruby3.3            │
 └──────────────────────────────────────────────────────────────────────────────┘
 
-/usr/bin/ruby3.3 -S gem build --config-file /dev/null --verbose /tmp/d20250131-168343-m3wqac/gemspec
+/usr/bin/ruby3.3 -S gem build --config-file /dev/null --verbose /tmp/d20260306-4019077-841xj5/gemspec
 WARNING:  open-ended dependency on rack (>= 3) is not recommended
   if rack is semantically versioned, use:
     add_runtime_dependency "rack", "~> 3"
@@ -895,7 +931,7 @@
   Name: rackup
   Version: 2.1.0
   File: rackup-2.1.0.gem
-/usr/bin/ruby3.3 -S gem install --config-file /dev/null --verbose --local --verbose --no-document --ignore-dependencies --install-dir debian/ruby-rackup/usr/share/rubygems-integration/all /tmp/d20250131-168343-m3wqac/rackup-2.1.0.gem
+/usr/bin/ruby3.3 -S gem install --config-file /dev/null --verbose --local --verbose --no-document --ignore-dependencies --install-dir debian/ruby-rackup/usr/share/rubygems-integration/all /tmp/d20260306-4019077-841xj5/rackup-2.1.0.gem
 /build/reproducible-path/ruby-rackup-2.1.0/debian/ruby-rackup/usr/share/rubygems-integration/all/gems/rackup-2.1.0/bin/rackup
 /build/reproducible-path/ruby-rackup-2.1.0/debian/ruby-rackup/usr/share/rubygems-integration/all/gems/rackup-2.1.0/lib/rack/handler.rb
 /build/reproducible-path/ruby-rackup-2.1.0/debian/ruby-rackup/usr/share/rubygems-integration/all/gems/rackup-2.1.0/lib/rack/server.rb
@@ -940,13 +976,13 @@
 
 RUBYLIB=. GEM_PATH=/build/reproducible-path/ruby-rackup-2.1.0/debian/ruby-rackup/usr/share/rubygems-integration/all:/build/reproducible-path/ruby-rackup-2.1.0/debian/.debhelper/generated/_source/home/.local/share/gem/ruby/3.3.0:/var/lib/gems/3.3.0:/usr/local/lib/ruby/gems/3.3.0:/usr/lib/ruby/gems/3.3.0:/usr/lib/aarch64-linux-gnu/ruby/gems/3.3.0:/usr/share/rubygems-integration/3.3.0:/usr/share/rubygems-integration/all:/usr/lib/aarch64-linux-gnu/rubygems-integration/3.3.0 ruby3.3 -S rake --rakelibdir /gem2deb-nonexistent -f debian/ruby-tests.rake
 /usr/bin/ruby3.3 -I"lib:test" /usr/share/rubygems-integration/all/gems/rake-13.2.1/lib/rake/rake_test_loader.rb "test/spec_handler.rb" "test/spec_lobster.rb" "test/spec_server.rb" "test/spec_webrick.rb" 
-Run options: --seed 5136
+Run options: --seed 42785
 
 # Running:
 
 .........................................................................
 
-Finished in 0.919902s, 79.3562 runs/s, 189.1505 assertions/s.
+Finished in 4.227766s, 17.2668 runs/s, 41.1565 assertions/s.
 
 73 runs, 174 assertions, 0 failures, 0 errors, 0 skips
 /usr/bin/ruby3.1 /usr/bin/gem2deb-test-runner
@@ -963,13 +999,13 @@
 
 RUBYLIB=. GEM_PATH=/build/reproducible-path/ruby-rackup-2.1.0/debian/ruby-rackup/usr/share/rubygems-integration/all:/build/reproducible-path/ruby-rackup-2.1.0/debian/.debhelper/generated/_source/home/.local/share/gem/ruby/3.1.0:/var/lib/gems/3.1.0:/usr/local/lib/ruby/gems/3.1.0:/usr/lib/ruby/gems/3.1.0:/usr/lib/aarch64-linux-gnu/ruby/gems/3.1.0:/usr/share/rubygems-integration/3.1.0:/usr/share/rubygems-integration/all:/usr/lib/aarch64-linux-gnu/rubygems-integration/3.1.0 ruby3.1 -S rake --rakelibdir /gem2deb-nonexistent -f debian/ruby-tests.rake
 /usr/bin/ruby3.1 -I"lib:test" /usr/share/rubygems-integration/all/gems/rake-13.2.1/lib/rake/rake_test_loader.rb "test/spec_handler.rb" "test/spec_lobster.rb" "test/spec_server.rb" "test/spec_webrick.rb" 
-Run options: --seed 21959
+Run options: --seed 61941
 
 # Running:
 
 .........................................................................
 
-Finished in 1.015224s, 71.9053 runs/s, 171.3908 assertions/s.
+Finished in 1.832920s, 39.8272 runs/s, 94.9305 assertions/s.
 
 73 runs, 174 assertions, 0 failures, 0 errors, 0 skips
 
@@ -1001,12 +1037,14 @@
 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/3992655/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3992655/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/162532 and its subdirectories
-I: Current time: Fri Jan 31 06:56:18 -12 2025
-I: pbuilder-time-stamp: 1738349778
+I: removing directory /srv/workspace/pbuilder/3992655 and its subdirectories
+I: Current time: Fri Mar  6 15:21:45 +14 2026
+I: pbuilder-time-stamp: 1772760105