Diff of the two buildlogs:

--
--- b1/build.log	2025-03-09 23:59:59.771284639 +0000
+++ b2/build.log	2025-03-10 00:04:10.915977127 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Apr 11 18:20:59 -12 2026
-I: pbuilder-time-stamp: 1775974860
+I: Current time: Mon Mar 10 14:00:02 +14 2025
+I: pbuilder-time-stamp: 1741564802
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -20,52 +20,84 @@
 dpkg-source: info: unpacking cdbs_0.4.169.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3675251/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3256520/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos11-amd64.
+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 10 00:00 /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/3256520/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3256520/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='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="x86_64-pc-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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='8d201bf7354b4378b259d3696e9ae6e3'
-  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='3675251'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=8d7b532c6f09408b9ae9bc16334b4813
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-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=3256520
   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.h9kHpFCN/pbuilderrc_arAA --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.h9kHpFCN/b1 --logfile b1/build.log cdbs_0.4.169.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  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.h9kHpFCN/pbuilderrc_cxRF --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.h9kHpFCN/b2 --logfile b2/build.log cdbs_0.4.169.dsc'
+  SUDO_GID=111
+  SUDO_UID=106
+  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 ionos5-amd64 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3675251/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3256520/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -191,7 +223,7 @@
 Get: 73 http://deb.debian.org/debian unstable/main amd64 python3-scour all 0.38.2-5 [55.7 kB]
 Get: 74 http://deb.debian.org/debian unstable/main amd64 scour all 0.38.2-5 [16.3 kB]
 Get: 75 http://deb.debian.org/debian unstable/main amd64 sharutils amd64 1:4.15.2-11 [268 kB]
-Fetched 167 MB in 5s (35.4 MB/s)
+Fetched 167 MB in 8s (21.5 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:amd64.
 (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 ... 19783 files and directories currently installed.)
@@ -446,8 +478,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Apr 12 06:21:43 UTC 2026.
-Universal Time is now:  Sun Apr 12 06:21:43 UTC 2026.
+Local time is now:      Mon Mar 10 00:01:19 UTC 2025.
+Universal Time is now:  Mon Mar 10 00:01:19 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -711,7 +743,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/cdbs-0.4.169/ && 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  > ../cdbs_0.4.169_source.changes
+I: user script /srv/workspace/pbuilder/3256520/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3256520/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/cdbs-0.4.169/ && 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  > ../cdbs_0.4.169_source.changes
 dpkg-buildpackage: info: source package cdbs
 dpkg-buildpackage: info: source version 0.4.169
 dpkg-buildpackage: info: source distribution unstable
@@ -749,7 +785,7 @@
 Scanning upstream source for new/changed copyright notices...
 
 set -e; LC_ALL=C.UTF-8 /usr/bin/licensecheck --check '.*' --recursive --copyright --deb-fmt --ignore '^(debian/(changelog|copyright(|_hints|_newhints)))$' --lines 0 -- * | scripts/licensecheck2dep5 --merge-licenses > debian/copyright_newhints
-/bin/sh: 1: /usr/bin/licensecheck: not found
+/bin/sh: line 1: /usr/bin/licensecheck: No such file or directory
 0 combinations of copyright and licensing found.
 No new copyright notices found - assuming no news is good news...
 touch debian/stamp-copyright-check
@@ -864,7 +900,7 @@
 touch debian/stamp-makefile-build
 /usr/bin/make -C . check || { cat tests/testsuite.log; }
 make[1]: Entering directory '/build/reproducible-path/cdbs-0.4.169'
-/bin/bash ./tests/testsuite -C tests      
+/bin/sh ./tests/testsuite -C tests      
 ## ------------------------ ##
 ## CDBS 0.4.169 test suite. ##
 ## ------------------------ ##
@@ -920,11 +956,11 @@
 ## Platform. ##
 ## --------- ##
 
-hostname = ionos5-amd64
+hostname = i-capture-the-hostname
 uname -m = x86_64
-uname -r = 6.12.12+bpo-amd64
+uname -r = 6.1.0-31-amd64
 uname -s = Linux
-uname -v = #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23)
+uname -v = #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07)
 
 /usr/bin/uname -p = unknown
 /bin/uname -X     = unknown
@@ -964,7 +1000,7 @@
 | 
 | AUTOTEST_PATH='tests'
 | 
-| SHELL=${CONFIG_SHELL-'/bin/bash'}
+| SHELL=${CONFIG_SHELL-'/bin/sh'}
 
 ## ---------------- ##
 ## Tested programs. ##
@@ -1008,19 +1044,19 @@
 ## ------------------ ##
 ## Running the tests. ##
 ## ------------------ ##
-testsuite: starting at: Sat Apr 11 18:21:53 -12 2026
-1. clean most possible snippets (clean.at:7): ok     (0m0.245s 0m0.046s)
-2. build with excludes (exclude.at:8): ok     (0m2.892s 0m0.463s)
-3. build with list-missing to -data (data.at:8): ok     (0m4.669s 0m0.853s)
-4. build autotools (auto.at:8): ok     (0m4.058s 0m0.807s)
-5. build autotools in custom builddir (auto-build.at:8): ok     (0m3.971s 0m0.893s)
-6. build autotools in custom dirs (auto-srcbuild.at:8): ok     (0m4.071s 0m0.898s)
-7. build autotools to -dbg (auto-dbg.at:8): ok     (0m5.576s 0m1.133s)
-10. build autotools to udeb (auto-udeb.at:8): ok     (0m3.768s 0m0.889s)
-11. build hdparm (hdparm.at:8): ok     (0m3.063s 0m0.583s)
-13. build ant (ant.at:8): ok     (0m6.115s 0m0.904s)
-testsuite: ending at: Sat Apr 11 18:22:51 -12 2026
-testsuite: test suite duration: 0h 0m 58s
+testsuite: starting at: Mon Mar 10 14:01:43 +14 2025
+1. clean most possible snippets (clean.at:7): ok     (0m0.413s 0m0.128s)
+2. build with excludes (exclude.at:8): ok     (0m5.233s 0m0.909s)
+3. build with list-missing to -data (data.at:8): ok     (0m8.203s 0m1.813s)
+4. build autotools (auto.at:8): ok     (0m7.015s 0m1.992s)
+5. build autotools in custom builddir (auto-build.at:8): ok     (0m7.005s 0m1.758s)
+6. build autotools in custom dirs (auto-srcbuild.at:8): ok     (0m6.980s 0m1.697s)
+7. build autotools to -dbg (auto-dbg.at:8): ok     (0m11.985s 0m2.904s)
+10. build autotools to udeb (auto-udeb.at:8): ok     (0m7.076s 0m1.782s)
+11. build hdparm (hdparm.at:8): ok     (0m5.554s 0m1.133s)
+13. build ant (ant.at:8): ok     (0m11.031s 0m1.828s)
+testsuite: ending at: Mon Mar 10 14:03:57 +14 2025
+testsuite: test suite duration: 0h 2m 14s
 
 ## ------------- ##
 ## Test results. ##
@@ -1217,11 +1253,11 @@
 | ## Platform. ##
 | ## --------- ##
 | 
-| hostname = ionos5-amd64
+| hostname = i-capture-the-hostname
 | uname -m = x86_64
-| uname -r = 6.12.12+bpo-amd64
+| uname -r = 6.1.0-31-amd64
 | uname -s = Linux
-| uname -v = #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23)
+| uname -v = #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07)
 | 
 | /usr/bin/uname -p = unknown
 | /bin/uname -X     = unknown
@@ -1239,6 +1275,7 @@
 | PATH: /sbin/
 | PATH: /bin/
 | PATH: /usr/games/
+| PATH: /i/capture/the/path/
 | 
 | 
 | ## ----------- ##
@@ -1283,7 +1320,7 @@
 |   CONFIG_COMMANDS = 
 |   $ ./config.status 
 | 
-| on ionos5-amd64
+| on i-capture-the-hostname
 | 
 | config.status:892: creating Makefile
 | config.status:1064: executing tests/atconfig commands
@@ -1403,7 +1440,7 @@
 | PACKAGE_VERSION='0.4.169'
 | PATH_SEPARATOR=':'
 | SET_MAKE=''
-| SHELL='/bin/bash'
+| SHELL='/bin/sh'
 | STRIP=''
 | VERSION='0.4.169'
 | _AX_GNU_AUTOTEST_shared1='AX_GNU_AUTOTEST_V_RUN = $(_AX_GNU_AUTOTEST_v_RUN_$(V))
@@ -1589,12 +1626,14 @@
 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/3256520/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3256520/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/3675251 and its subdirectories
-I: Current time: Sat Apr 11 18:22:56 -12 2026
-I: pbuilder-time-stamp: 1775974976
+I: removing directory /srv/workspace/pbuilder/3256520 and its subdirectories
+I: Current time: Mon Mar 10 14:04:10 +14 2025
+I: pbuilder-time-stamp: 1741565050