Diff of the two buildlogs:

--
--- b1/build.log	2023-05-02 22:03:13.431625074 +0000
+++ b2/build.log	2023-05-02 22:04:58.387013488 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue May  2 10:01:38 -12 2023
-I: pbuilder-time-stamp: 1683064898
+I: Current time: Tue Jun  4 18:26:17 +14 2024
+I: pbuilder-time-stamp: 1717475177
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./ruby-filesystem_0.5.orig.tar.gz]
 I: copying [./ruby-filesystem_0.5-7.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Wed Nov  9 17:03:57 2022 -12
+gpgv: Signature made Thu Nov 10 19:03:57 2022 +14
 gpgv:                using RSA key B522F39159DA07DD39DC0B11F4BAAA80DB28BA4C
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./ruby-filesystem_0.5-7.dsc: no acceptable signature found
@@ -28,52 +28,84 @@
 dpkg-source: info: applying 1.9-support
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2702/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2572/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink9-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 Jun  4 18:26 /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/2572/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2572/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build'
-  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]="15" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.15(1)-release'
+  BUILDDIR=/build
+  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=8'
-  DISTRIBUTION='bookworm'
-  HOME='/var/lib/jenkins'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/var/lib/jenkins
+  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='2702'
-  PS1='# '
-  PS2='> '
+  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=2572
   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.yNwJNvN9/pbuilderrc_goia --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.yNwJNvN9/b1 --logfile b1/build.log ruby-filesystem_0.5-7.dsc'
-  SUDO_GID='117'
-  SUDO_UID='110'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  USERNAME='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.16:3128'
+  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.yNwJNvN9/pbuilderrc_QdeL --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.yNwJNvN9/b2 --logfile b2/build.log --extrapackages usrmerge ruby-filesystem_0.5-7.dsc'
+  SUDO_GID=117
+  SUDO_UID=110
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  USERNAME=root
+  _='I: set'
+  http_proxy=http://192.168.101.16:3128
 I: uname -a
-  Linux codethink16-arm64 4.15.0-210-generic #221-Ubuntu SMP Tue Apr 18 08:32:48 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-210-generic #221-Ubuntu SMP Tue Apr 18 08:32:48 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May  1 22:25 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2702/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 28  2023 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2572/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -236,7 +268,7 @@
 Get: 123 http://deb.debian.org/debian bookworm/main arm64 ruby3.1-dev arm64 3.1.2-7 [1004 kB]
 Get: 124 http://deb.debian.org/debian bookworm/main arm64 ruby-all-dev arm64 1:3.1 [5984 B]
 Get: 125 http://deb.debian.org/debian bookworm/main arm64 gem2deb arm64 2.1 [53.5 kB]
-Fetched 45.2 MB in 3s (15.6 MB/s)
+Fetched 45.2 MB in 2s (25.7 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-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 ... 19616 files and directories currently installed.)
@@ -762,10 +794,15 @@
 Reading package lists...
 Building dependency tree...
 Reading state information...
+usrmerge is already the newest version (35).
 fakeroot is already the newest version (1.31-1.2).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/ruby-filesystem-0.5/ && 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-filesystem_0.5-7_source.changes
+I: user script /srv/workspace/pbuilder/2572/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/2572/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/ruby-filesystem-0.5/ && 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-filesystem_0.5-7_source.changes
 dpkg-buildpackage: info: source package ruby-filesystem
 dpkg-buildpackage: info: source version 0.5-7
 dpkg-buildpackage: info: source distribution unstable
@@ -817,7 +854,7 @@
 
 /usr/bin/ruby3.1 /usr/lib/ruby/vendor_ruby/gem2deb/extension_builder.rb /build/ruby-filesystem-0.5 debian/ruby-filesystem
 current directory: /build/ruby-filesystem-0.5/ext/filesystem
-["/usr/bin/ruby3.1", "-I", "/usr/lib/ruby/vendor_ruby", "-r", "./siteconf20230502-7672-btq8eb.rb", "extconf.rb"]
+["/usr/bin/ruby3.1", "-I", "/usr/lib/ruby/vendor_ruby", "-r", "./siteconf20240604-7217-2s7tpd.rb", "extconf.rb"]
 checking for sys/mnttab.h... no
 creating Makefile
 current directory: /build/ruby-filesystem-0.5/ext/filesystem
@@ -865,12 +902,12 @@
 current directory: /build/ruby-filesystem-0.5/ext/filesystem
 ["make", "V=1", "CC=gcc -fdebug-prefix-map=/build/ruby-filesystem-0.5=.", "CXX=g++ -fdebug-prefix-map=/build/ruby-filesystem-0.5=.", "DESTDIR=", "install"]
 make[1]: Entering directory '/build/ruby-filesystem-0.5/ext/filesystem'
-/bin/mkdir -p . ./.gem.20230502-7672-99suue
+/bin/mkdir -p . ./.gem.20240604-7217-gcdwfm
 exit > .sitearchdir.time
-/usr/bin/install -c -m 0755 filesystem.so ./.gem.20230502-7672-99suue
+/usr/bin/install -c -m 0755 filesystem.so ./.gem.20240604-7217-gcdwfm
 make[1]: Leaving directory '/build/ruby-filesystem-0.5/ext/filesystem'
 current directory: /build/ruby-filesystem-0.5/ext/filesystem
-/usr/bin/ruby3.1 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20230502-7672-btq8eb.rb extconf.rb
+/usr/bin/ruby3.1 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20240604-7217-2s7tpd.rb extconf.rb
 current directory: /build/ruby-filesystem-0.5/ext/filesystem
 make V\=1 CC\=gcc\ -fdebug-prefix-map\=/build/ruby-filesystem-0.5\=. CXX\=g++\ -fdebug-prefix-map\=/build/ruby-filesystem-0.5\=. DESTDIR\= clean
 current directory: /build/ruby-filesystem-0.5/ext/filesystem
@@ -879,7 +916,7 @@
 make V\=1 CC\=gcc\ -fdebug-prefix-map\=/build/ruby-filesystem-0.5\=. CXX\=g++\ -fdebug-prefix-map\=/build/ruby-filesystem-0.5\=. DESTDIR\= install
 rm -f /build/ruby-filesystem-0.5/debian/ruby-filesystem/usr/lib/aarch64-linux-gnu/ruby/vendor_ruby/3.1.0/mkmf.log
 current directory: /build/ruby-filesystem-0.5
-["/usr/bin/ruby3.1", "-I", "/usr/lib/ruby/vendor_ruby", "-r", "./siteconf20230502-7672-kw3pe0.rb", "extconf.rb"]
+["/usr/bin/ruby3.1", "-I", "/usr/lib/ruby/vendor_ruby", "-r", "./siteconf20240604-7217-e0afbp.rb", "extconf.rb"]
 checking for sys/mnttab.h... no
 creating Makefile
 current directory: /build/ruby-filesystem-0.5
@@ -927,12 +964,12 @@
 current directory: /build/ruby-filesystem-0.5
 ["make", "V=1", "CC=gcc -fdebug-prefix-map=/build/ruby-filesystem-0.5=.", "CXX=g++ -fdebug-prefix-map=/build/ruby-filesystem-0.5=.", "DESTDIR=", "install"]
 make[1]: Entering directory '/build/ruby-filesystem-0.5'
-/bin/mkdir -p . ./.gem.20230502-7672-3gw1o5
+/bin/mkdir -p . ./.gem.20240604-7217-2i45oh
 exit > .sitearchdir.time
-/usr/bin/install -c -m 0755 filesystem.so ./.gem.20230502-7672-3gw1o5
+/usr/bin/install -c -m 0755 filesystem.so ./.gem.20240604-7217-2i45oh
 make[1]: Leaving directory '/build/ruby-filesystem-0.5'
 current directory: /build/ruby-filesystem-0.5
-/usr/bin/ruby3.1 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20230502-7672-kw3pe0.rb extconf.rb
+/usr/bin/ruby3.1 -I /usr/lib/ruby/vendor_ruby -r ./siteconf20240604-7217-e0afbp.rb extconf.rb
 current directory: /build/ruby-filesystem-0.5
 make V\=1 CC\=gcc\ -fdebug-prefix-map\=/build/ruby-filesystem-0.5\=. CXX\=g++\ -fdebug-prefix-map\=/build/ruby-filesystem-0.5\=. DESTDIR\= clean
 current directory: /build/ruby-filesystem-0.5
@@ -998,10 +1035,10 @@
    dh_md5sums -O--buildsystem=ruby
    dh_builddeb -O--buildsystem=ruby
 dpkg-deb: building package 'ruby-filesystem' in '../ruby-filesystem_0.5-7_arm64.deb'.
-dpkg-deb: building package 'libfilesystem-ruby' in '../libfilesystem-ruby_0.5-7_all.deb'.
-dpkg-deb: building package 'libfilesystem-ruby1.9' in '../libfilesystem-ruby1.9_0.5-7_all.deb'.
 dpkg-deb: building package 'ruby-filesystem-dbgsym' in '../ruby-filesystem-dbgsym_0.5-7_arm64.deb'.
+dpkg-deb: building package 'libfilesystem-ruby1.9' in '../libfilesystem-ruby1.9_0.5-7_all.deb'.
 dpkg-deb: building package 'libfilesystem-ruby1.8' in '../libfilesystem-ruby1.8_0.5-7_all.deb'.
+dpkg-deb: building package 'libfilesystem-ruby' in '../libfilesystem-ruby_0.5-7_all.deb'.
  dpkg-genbuildinfo --build=binary -O../ruby-filesystem_0.5-7_arm64.buildinfo
  dpkg-genchanges --build=binary -O../ruby-filesystem_0.5-7_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1009,12 +1046,14 @@
 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/2572/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2572/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/2702 and its subdirectories
-I: Current time: Tue May  2 10:03:12 -12 2023
-I: pbuilder-time-stamp: 1683064992
+I: removing directory /srv/workspace/pbuilder/2572 and its subdirectories
+I: Current time: Tue Jun  4 18:27:56 +14 2024
+I: pbuilder-time-stamp: 1717475276