Diff of the two buildlogs:

--
--- b1/build.log	2025-03-10 00:01:28.463291189 +0000
+++ b2/build.log	2025-03-10 00:02:40.396052495 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Mar  9 11:59:22 -12 2025
-I: pbuilder-time-stamp: 1741564762
+I: Current time: Sun Apr 12 20:24:29 +14 2026
+I: pbuilder-time-stamp: 1775975069
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: applying cross.diff
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3249088/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1822832/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-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 Apr 12 06:24 /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/1822832/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1822832/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=20 '
-  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=42 '
+  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='3edeeb9b738843bd8cda351c95701d9d'
-  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='3249088'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=1508678255e54a1a83badaa28608b108
+  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=1822832
   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.dy4kDco8/pbuilderrc_xQIl --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.dy4kDco8/b1 --logfile b1/build.log zpspell_0.4.3-7.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  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.dy4kDco8/pbuilderrc_5Qyp --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.dy4kDco8/b2 --logfile b2/build.log zpspell_0.4.3-7.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://213.165.73.152:3128
 I: uname -a
-  Linux ionos11-amd64 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3249088/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1822832/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -227,7 +259,7 @@
 Get: 110 http://deb.debian.org/debian unstable/main amd64 libgcrypt20 amd64 1.11.0-7 [843 kB]
 Get: 111 http://deb.debian.org/debian unstable/main amd64 libxslt1.1 amd64 1.1.35-1.1+b1 [233 kB]
 Get: 112 http://deb.debian.org/debian unstable/main amd64 xsltproc amd64 1.1.35-1.1+b1 [115 kB]
-Fetched 60.7 MB in 1s (58.8 MB/s)
+Fetched 60.7 MB in 5s (13.5 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.)
@@ -602,8 +634,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Mar 10 00:00:30 UTC 2025.
-Universal Time is now:  Mon Mar 10 00:00:30 UTC 2025.
+Local time is now:      Sun Apr 12 06:25:17 UTC 2026.
+Universal Time is now:  Sun Apr 12 06:25:17 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libsysprof-capture-4-dev:amd64 (48~beta-2) ...
@@ -709,7 +741,11 @@
 fakeroot is already the newest version (1.37-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/zpspell-0.4.3/ && 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  > ../zpspell_0.4.3-7_source.changes
+I: user script /srv/workspace/pbuilder/1822832/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1822832/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/zpspell-0.4.3/ && 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  > ../zpspell_0.4.3-7_source.changes
 dpkg-buildpackage: info: source package zpspell
 dpkg-buildpackage: info: source version 0.4.3-7
 dpkg-buildpackage: info: source distribution unstable
@@ -776,7 +812,7 @@
 --   Found dbus-glib-1, version 0.112
 -- Checking for module 'glib-2.0'
 --   Found glib-2.0, version 2.83.5
--- Configuring done (8.2s)
+-- Configuring done (3.1s)
 -- Generating done (0.0s)
 CMake Warning:
   Manually-specified variables were not used by the project:
@@ -793,7 +829,7 @@
 
 -- Build files have been written to: /build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu
    dh_auto_build
-	cd obj-x86_64-linux-gnu && make -j20 "INSTALL=install --strip-program=true" VERBOSE=1
+	cd obj-x86_64-linux-gnu && make -j42 "INSTALL=install --strip-program=true" VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu'
 /usr/bin/cmake -S/build/reproducible-path/zpspell-0.4.3 -B/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu --check-build-system CMakeFiles/Makefile.cmake 0
 /usr/bin/cmake -E cmake_progress_start /build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu/CMakeFiles /build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu//CMakeFiles/progress.marks
@@ -805,12 +841,12 @@
 make[3]: Leaving directory '/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu'
 make  -f CMakeFiles/zpspell.dir/build.make CMakeFiles/zpspell.dir/build
 make[3]: Entering directory '/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu'
-[ 75%] Building CXX object CMakeFiles/zpspell.dir/main.cpp.o
-[ 75%] Building CXX object CMakeFiles/zpspell.dir/zsconn.cpp.o
-[ 75%] Building CXX object CMakeFiles/zpspell.dir/zstring.cpp.o
-/usr/bin/c++  -I/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -g -O2 -ffile-prefix-map=/build/reproducible-path/zpspell-0.4.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -MD -MT CMakeFiles/zpspell.dir/main.cpp.o -MF CMakeFiles/zpspell.dir/main.cpp.o.d -o CMakeFiles/zpspell.dir/main.cpp.o -c /build/reproducible-path/zpspell-0.4.3/main.cpp
+[ 25%] Building CXX object CMakeFiles/zpspell.dir/zsconn.cpp.o
 /usr/bin/c++  -I/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -g -O2 -ffile-prefix-map=/build/reproducible-path/zpspell-0.4.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -MD -MT CMakeFiles/zpspell.dir/zsconn.cpp.o -MF CMakeFiles/zpspell.dir/zsconn.cpp.o.d -o CMakeFiles/zpspell.dir/zsconn.cpp.o -c /build/reproducible-path/zpspell-0.4.3/zsconn.cpp
+[ 75%] Building CXX object CMakeFiles/zpspell.dir/zstring.cpp.o
+[ 75%] Building CXX object CMakeFiles/zpspell.dir/main.cpp.o
 /usr/bin/c++  -I/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -g -O2 -ffile-prefix-map=/build/reproducible-path/zpspell-0.4.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -MD -MT CMakeFiles/zpspell.dir/zstring.cpp.o -MF CMakeFiles/zpspell.dir/zstring.cpp.o.d -o CMakeFiles/zpspell.dir/zstring.cpp.o -c /build/reproducible-path/zpspell-0.4.3/zstring.cpp
+/usr/bin/c++  -I/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -g -O2 -ffile-prefix-map=/build/reproducible-path/zpspell-0.4.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -MD -MT CMakeFiles/zpspell.dir/main.cpp.o -MF CMakeFiles/zpspell.dir/main.cpp.o.d -o CMakeFiles/zpspell.dir/main.cpp.o -c /build/reproducible-path/zpspell-0.4.3/main.cpp
 /build/reproducible-path/zpspell-0.4.3/zsconn.cpp: In constructor 'ZSConn::ZSConn()':
 /build/reproducible-path/zpspell-0.4.3/zsconn.cpp:21:16: warning: 'void g_type_init()' is deprecated [-Wdeprecated-declarations]
    21 |     g_type_init();
@@ -836,7 +872,7 @@
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/zpspell/
-	cd obj-x86_64-linux-gnu && make -j20 install DESTDIR=/build/reproducible-path/zpspell-0.4.3/debian/zpspell AM_UPDATE_INFO_DIR=no "INSTALL=install --strip-program=true"
+	cd obj-x86_64-linux-gnu && make -j42 install DESTDIR=/build/reproducible-path/zpspell-0.4.3/debian/zpspell AM_UPDATE_INFO_DIR=no "INSTALL=install --strip-program=true"
 make[1]: Entering directory '/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu'
 /usr/bin/cmake -S/build/reproducible-path/zpspell-0.4.3 -B/build/reproducible-path/zpspell-0.4.3/obj-x86_64-linux-gnu --check-build-system CMakeFiles/Makefile.cmake 0
 make  -f CMakeFiles/Makefile2 preinstall
@@ -889,8 +925,8 @@
 dpkg-gencontrol: warning: unknown information field 'Vsc-Git' in input data in source package stanza of template control file
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'zpspell' in '../zpspell_0.4.3-7_amd64.deb'.
 dpkg-deb: building package 'zpspell-dbgsym' in '../zpspell-dbgsym_0.4.3-7_amd64.deb'.
+dpkg-deb: building package 'zpspell' in '../zpspell_0.4.3-7_amd64.deb'.
  dpkg-genbuildinfo --build=binary -O../zpspell_0.4.3-7_amd64.buildinfo
  dpkg-genchanges --build=binary -O../zpspell_0.4.3-7_amd64.changes
 dpkg-genchanges: warning: unknown information field 'Vsc-Git' in input data in source package stanza of template control file
@@ -901,12 +937,14 @@
 dpkg-genchanges: warning: unknown information field 'Vsc-Git' in input data in source package stanza of template control file
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/1822832/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1822832/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/3249088 and its subdirectories
-I: Current time: Sun Mar  9 12:01:27 -12 2025
-I: pbuilder-time-stamp: 1741564887
+I: removing directory /srv/workspace/pbuilder/1822832 and its subdirectories
+I: Current time: Sun Apr 12 20:25:37 +14 2026
+I: pbuilder-time-stamp: 1775975137