Diff of the two buildlogs:

--
--- b1/build.log	2024-11-17 01:37:05.552036315 +0000
+++ b2/build.log	2024-11-17 01:37:54.925790743 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Dec 19 19:59:33 -12 2025
-I: pbuilder-time-stamp: 1766217573
+I: Current time: Sun Nov 17 15:37:07 +14 2024
+I: pbuilder-time-stamp: 1731807427
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -24,54 +24,86 @@
 dpkg-source: info: unpacking debianutils_5.21.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/62110/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/10667/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos12-i386.
+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 Nov 17 01:37 /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/10667/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/10667/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='i386'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=22 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='i386'
+  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]="32" [3]="1" [4]="release" [5]="i686-pc-linux-gnu")
+  BASH_VERSION='5.2.32(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=10 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='01112f6a0f684a7698926b56a89fae65'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  LD_LIBRARY_PATH='/usr/lib/libeatmydata'
-  LD_PRELOAD='libeatmydata.so'
-  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='62110'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=e243868c67814bceb48607671a72b154
+  LANG=C
+  LANGUAGE=de_CH:de
+  LC_ALL=C
+  LD_LIBRARY_PATH=/usr/lib/libeatmydata
+  LD_PRELOAD=libeatmydata.so
+  MACHTYPE=i686-pc-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=10667
   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.d1F1tDK3/pbuilderrc_ccuP --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.d1F1tDK3/b1 --logfile b1/build.log debianutils_5.21.dsc'
-  SUDO_GID='112'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.d1F1tDK3/pbuilderrc_Rm5K --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.d1F1tDK3/b2 --logfile b2/build.log debianutils_5.21.dsc'
+  SUDO_GID=112
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos16-i386 6.1.0-27-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-27-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/62110/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/10667/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -149,7 +181,7 @@
 Get: 38 http://deb.debian.org/debian unstable/main i386 libyaml-tiny-perl all 1.74-1 [30.7 kB]
 Get: 39 http://deb.debian.org/debian unstable/main i386 opensp i386 1.5.2-15 [455 kB]
 Get: 40 http://deb.debian.org/debian unstable/main i386 po4a all 0.73-2 [2155 kB]
-Fetched 24.0 MB in 0s (49.8 MB/s)
+Fetched 24.0 MB in 0s (58.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sgml-base.
 (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 ... 19952 files and directories currently installed.)
@@ -326,7 +358,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/debianutils-5.21/ && 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  > ../debianutils_5.21_source.changes
+I: user script /srv/workspace/pbuilder/10667/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/10667/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/debianutils-5.21/ && 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  > ../debianutils_5.21_source.changes
 dpkg-buildpackage: info: source package debianutils
 dpkg-buildpackage: info: source version 5.21
 dpkg-buildpackage: info: source distribution unstable
@@ -392,7 +428,7 @@
 config.status: creating po4a/sl/Makefile
 config.status: executing depfiles commands
    dh_auto_build
-	make -j22
+	make -j10
 make[1]: Entering directory '/build/reproducible-path/debianutils-5.21'
 Making all in po4a
 make[2]: Entering directory '/build/reproducible-path/debianutils-5.21/po4a'
@@ -535,13 +571,13 @@
 tempfile.c:64:7: note: 'fd' was declared here
    64 |   int fd, optc;
       |       ^~
-gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/debianutils-5.21=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -g -pedantic  -Wl,-z,relro -Wl,-z,now -Wl,-z,relro -o tempfile tempfile.o  
 gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/debianutils-5.21=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -g -pedantic  -Wl,-z,relro -Wl,-z,now -Wl,-z,relro -o ischroot ischroot.o  
+gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/debianutils-5.21=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -g -pedantic  -Wl,-z,relro -Wl,-z,now -Wl,-z,relro -o tempfile tempfile.o  
 gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/debianutils-5.21=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -g -pedantic  -Wl,-z,relro -Wl,-z,now -Wl,-z,relro -o run-parts run-parts.o  
 make[2]: Leaving directory '/build/reproducible-path/debianutils-5.21'
 make[1]: Leaving directory '/build/reproducible-path/debianutils-5.21'
    dh_auto_test
-	make -j22 check "TESTSUITEFLAGS=-j22 --verbose" VERBOSE=1
+	make -j10 check "TESTSUITEFLAGS=-j10 --verbose" VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/debianutils-5.21'
 Making check in po4a
 make[2]: Entering directory '/build/reproducible-path/debianutils-5.21/po4a'
@@ -588,7 +624,7 @@
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/debianutils/
-	make -j22 install DESTDIR=/build/reproducible-path/debianutils-5.21/debian/debianutils AM_UPDATE_INFO_DIR=no
+	make -j10 install DESTDIR=/build/reproducible-path/debianutils-5.21/debian/debianutils AM_UPDATE_INFO_DIR=no
 make[1]: Entering directory '/build/reproducible-path/debianutils-5.21'
 Making install in po4a
 make[2]: Entering directory '/build/reproducible-path/debianutils-5.21/po4a'
@@ -638,8 +674,8 @@
 make[4]: Nothing to be done for 'install-exec-am'.
  /usr/bin/mkdir -p '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/ja/man8'
  /usr/bin/mkdir -p '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/ja/man1'
- /usr/bin/install -c -m 644 add-shell.8 installkernel.8 remove-shell.8 run-parts.8 savelog.8 '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/ja/man8'
  /usr/bin/install -c -m 644 which.debianutils.1 '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/ja/man1'
+ /usr/bin/install -c -m 644 add-shell.8 installkernel.8 remove-shell.8 run-parts.8 savelog.8 '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/ja/man8'
 make[4]: Leaving directory '/build/reproducible-path/debianutils-5.21/po4a/ja'
 make[3]: Leaving directory '/build/reproducible-path/debianutils-5.21/po4a/ja'
 Making install in pl
@@ -686,8 +722,8 @@
  /usr/bin/mkdir -p '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/sbin'
  /usr/bin/mkdir -p '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/man1'
  /usr/bin/mkdir -p '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/man8'
-  /usr/bin/install -c run-parts tempfile ischroot '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/bin'
  /usr/bin/install -c which.debianutils savelog '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/bin'
+  /usr/bin/install -c run-parts tempfile ischroot '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/bin'
  /usr/bin/install -c installkernel add-shell remove-shell update-shells '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/sbin'
  /usr/bin/install -c -m 644 tempfile.1 which.debianutils.1 ischroot.1 '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/man1'
  /usr/bin/install -c -m 644 run-parts.8 installkernel.8 savelog.8 add-shell.8 remove-shell.8 update-shells.8 '/build/reproducible-path/debianutils-5.21/debian/debianutils/usr/share/man/man8'
@@ -719,8 +755,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'debianutils' in '../debianutils_5.21_i386.deb'.
 dpkg-deb: building package 'debianutils-dbgsym' in '../debianutils-dbgsym_5.21_i386.deb'.
+dpkg-deb: building package 'debianutils' in '../debianutils_5.21_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../debianutils_5.21_i386.buildinfo
  dpkg-genchanges --build=binary -O../debianutils_5.21_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -728,12 +764,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/10667/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/10667/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/62110 and its subdirectories
-I: Current time: Fri Dec 19 20:00:03 -12 2025
-I: pbuilder-time-stamp: 1766217603
+I: removing directory /srv/workspace/pbuilder/10667 and its subdirectories
+I: Current time: Sun Nov 17 15:37:54 +14 2024
+I: pbuilder-time-stamp: 1731807474