Diff of the two buildlogs:

--
--- b1/build.log	2025-03-13 11:54:47.224287199 +0000
+++ b2/build.log	2025-03-13 11:56:23.111962904 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Mar 12 23:53:47 -12 2025
-I: pbuilder-time-stamp: 1741866827
+I: Current time: Thu Apr 16 08:17:49 +14 2026
+I: pbuilder-time-stamp: 1776277069
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,54 +26,86 @@
 dpkg-source: info: applying cross.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/50912/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/52926/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos6-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 Apr 15 18:18 /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/52926/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/52926/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=11 '
-  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]="37" [3]="1" [4]="release" [5]="i686-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=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=21 '
+  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='df0493fbe4d3410b85225fc8249837d3'
-  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='50912'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=2b90083603e24985af66be1cd45adda6
+  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=52926
   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.GwEX8IIm/pbuilderrc_O4QR --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.GwEX8IIm/b1 --logfile b1/build.log bfm_0.6.4-7.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://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.GwEX8IIm/pbuilderrc_Z5t0 --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.GwEX8IIm/b2 --logfile b2/build.log bfm_0.6.4-7.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://213.165.73.152:3128
 I: uname -a
-  Linux ionos2-i386 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 6.1.0-31-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 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/50912/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/52926/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -334,7 +366,7 @@
 Get: 219 http://deb.debian.org/debian unstable/main i386 libxdamage-dev i386 1:1.1.6-1+b2 [15.5 kB]
 Get: 220 http://deb.debian.org/debian unstable/main i386 libxml2-utils i386 2.12.7+dfsg+really2.9.14-0.2+b2 [99.6 kB]
 Get: 221 http://deb.debian.org/debian unstable/main i386 libgtk2.0-dev i386 2.24.33-7 [798 kB]
-Fetched 79.3 MB in 1s (60.0 MB/s)
+Fetched 79.3 MB in 1s (71.9 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:i386.
 (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 ... 19769 files and directories currently installed.)
@@ -1055,8 +1087,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Mar 13 11:54:26 UTC 2025.
-Universal Time is now:  Thu Mar 13 11:54:26 UTC 2025.
+Local time is now:      Wed Apr 15 18:18:25 UTC 2026.
+Universal Time is now:  Wed Apr 15 18:18:25 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libsysprof-capture-4-dev:i386 (48~beta-2) ...
@@ -1257,7 +1289,11 @@
 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/bfm-0.6.4/ && 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  > ../bfm_0.6.4-7_source.changes
+I: user script /srv/workspace/pbuilder/52926/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/52926/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/bfm-0.6.4/ && 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  > ../bfm_0.6.4-7_source.changes
 dpkg-buildpackage: info: source package bfm
 dpkg-buildpackage: info: source version 0.6.4-7
 dpkg-buildpackage: info: source distribution unstable
@@ -1267,7 +1303,7 @@
  debian/rules clean
 dh clean
    dh_auto_clean
-	make -j11 clean
+	make -j21 clean
 make[1]: Entering directory '/build/reproducible-path/bfm-0.6.4'
 rm -f bubblefishymon *.o *.bb* *.gcov gmon.* *.da *~ *.so
 make[1]: Leaving directory '/build/reproducible-path/bfm-0.6.4'
@@ -1280,7 +1316,7 @@
    debian/rules override_dh_auto_build
 make[1]: Entering directory '/build/reproducible-path/bfm-0.6.4'
 dh_auto_build -- PREFIX=/usr STRIP=true bubblefishymon
-	make -j11 "INSTALL=install --strip-program=true" PREFIX=/usr STRIP=true bubblefishymon
+	make -j21 "INSTALL=install --strip-program=true" PREFIX=/usr STRIP=true bubblefishymon
 make[2]: Entering directory '/build/reproducible-path/bfm-0.6.4'
 rm -rf *.o
 gcc -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/i386-linux-gnu -I/usr/include/webp -I/usr/include/atk-1.0 -pthread  -DENABLE_DUCK -DENABLE_CPU -DENABLE_MEMSCREEN -DENABLE_FISH -DENABLE_TIME -DUPSIDE_DOWN_DUCK -DKDE_DOCKAPP  -DNET_DEVICE=\"eth0\" -o bubblefishymon \
@@ -1325,7 +1361,7 @@
 true bubblefishymon
 make[2]: Leaving directory '/build/reproducible-path/bfm-0.6.4'
 dh_auto_build -- PREFIX=/usr STRIP=true gkrellm
-	make -j11 "INSTALL=install --strip-program=true" PREFIX=/usr STRIP=true gkrellm
+	make -j21 "INSTALL=install --strip-program=true" PREFIX=/usr STRIP=true gkrellm
 make[2]: Entering directory '/build/reproducible-path/bfm-0.6.4'
 rm -rf *.o
 gcc -DGKRELLM2 -DGKRELLM_BFM -fPIC -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/i386-linux-gnu -I/usr/include/webp -I/usr/include/atk-1.0 -pthread  -DENABLE_DUCK -DENABLE_CPU -DENABLE_MEMSCREEN -DENABLE_FISH -DENABLE_TIME -DUPSIDE_DOWN_DUCK -DKDE_DOCKAPP  -DNET_DEVICE=\"eth0\" -c fishmon.c bubblemon.c sys_linux.c \
@@ -1401,8 +1437,8 @@
    dh_fixperms
    dh_missing
    dh_dwz -a
-dwz: debian/bubblefishymon/usr/bin/bubblefishymon: .debug_info section not present
-dwz: debian/gkrellm-bfm/usr/lib/gkrellm2/plugins/gkrellm-bfm.so: .debug_info section not present
+dwz: dwz: debian/gkrellm-bfm/usr/lib/gkrellm2/plugins/gkrellm-bfm.so: .debug_info section not present
+debian/bubblefishymon/usr/bin/bubblefishymon: .debug_info section not present
    dh_strip -a
    dh_makeshlibs -a
    dh_shlibdeps -a
@@ -1410,10 +1446,10 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'bubblefishymon' in '../bubblefishymon_0.6.4-7_i386.deb'.
-dpkg-deb: building package 'bubblefishymon-dbgsym' in '../bubblefishymon-dbgsym_0.6.4-7_i386.deb'.
-dpkg-deb: building package 'gkrellm-bfm' in '../gkrellm-bfm_0.6.4-7_i386.deb'.
 dpkg-deb: building package 'gkrellm-bfm-dbgsym' in '../gkrellm-bfm-dbgsym_0.6.4-7_i386.deb'.
+dpkg-deb: building package 'gkrellm-bfm' in '../gkrellm-bfm_0.6.4-7_i386.deb'.
+dpkg-deb: building package 'bubblefishymon-dbgsym' in '../bubblefishymon-dbgsym_0.6.4-7_i386.deb'.
+dpkg-deb: building package 'bubblefishymon' in '../bubblefishymon_0.6.4-7_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../bfm_0.6.4-7_i386.buildinfo
  dpkg-genchanges --build=binary -O../bfm_0.6.4-7_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1421,12 +1457,14 @@
 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/52926/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/52926/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/50912 and its subdirectories
-I: Current time: Wed Mar 12 23:54:46 -12 2025
-I: pbuilder-time-stamp: 1741866886
+I: removing directory /srv/workspace/pbuilder/52926 and its subdirectories
+I: Current time: Thu Apr 16 08:19:20 +14 2026
+I: pbuilder-time-stamp: 1776277160