Diff of the two buildlogs:

--
--- b1/build.log	2024-12-31 20:47:01.422977522 +0000
+++ b2/build.log	2024-12-31 20:47:57.812402409 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Dec 31 08:45:54 -12 2024
-I: pbuilder-time-stamp: 1735677954
+I: Current time: Tue Feb  3 17:10:03 +14 2026
+I: pbuilder-time-stamp: 1770088203
 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 debian/Change-EPERM-error-message-to-show-Debian-specific-inform.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/32178/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/6733/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos16-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 Feb  3 03:10 /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/6733/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/6733/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='daf2e89d9346496bacb9be4723493f1c'
-  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='32178'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=b4ea61ccccfa480497c3a8cff479f00d
+  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=6733
   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.Amvq9sqA/pbuilderrc_Mqd2 --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.Amvq9sqA/b1 --logfile b1/build.log bubblewrap_0.11.0-2.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.Amvq9sqA/pbuilderrc_jtmB --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.Amvq9sqA/b2 --logfile b2/build.log bubblewrap_0.11.0-2.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 ionos12-i386 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/32178/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/6733/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -225,7 +257,7 @@
 Get: 91 http://deb.debian.org/debian unstable/main i386 pkgconf-bin i386 1.8.1-4 [30.6 kB]
 Get: 92 http://deb.debian.org/debian unstable/main i386 pkgconf i386 1.8.1-4 [26.2 kB]
 Get: 93 http://deb.debian.org/debian unstable/main i386 xsltproc i386 1.1.35-1.1+b1 [115 kB]
-Fetched 37.0 MB in 0s (81.9 MB/s)
+Fetched 37.0 MB in 1s (35.0 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.12-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 ... 19844 files and directories currently installed.)
@@ -543,8 +575,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Dec 31 20:46:30 UTC 2024.
-Universal Time is now:  Tue Dec 31 20:46:30 UTC 2024.
+Local time is now:      Tue Feb  3 03:10:34 UTC 2026.
+Universal Time is now:  Tue Feb  3 03:10:34 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libcap2-bin (1:2.66-5+b1) ...
@@ -629,7 +661,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/bubblewrap-0.11.0/ && 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  > ../bubblewrap_0.11.0-2_source.changes
+I: user script /srv/workspace/pbuilder/6733/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/6733/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/bubblewrap-0.11.0/ && 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  > ../bubblewrap_0.11.0-2_source.changes
 dpkg-buildpackage: info: source package bubblewrap
 dpkg-buildpackage: info: source version 0.11.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -710,7 +746,7 @@
 Found ninja-1.12.1 at /usr/bin/ninja
 make[1]: Leaving directory '/build/reproducible-path/bubblewrap-0.11.0'
    dh_auto_build -O--buildsystem=meson\+ninja
-	cd obj-i686-linux-gnu && LC_ALL=C.UTF-8 ninja -j11 -v
+	cd obj-i686-linux-gnu && LC_ALL=C.UTF-8 ninja -j21 -v
 [1/11] cc -Itests/try-syscall.p -Itests -I../tests -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -D_GNU_SOURCE -Werror=shadow -Werror=empty-body -Werror=strict-prototypes -Werror=missing-prototypes -Werror=implicit-function-declaration -Werror=pointer-arith -Werror=init-self -Werror=missing-declarations -Werror=return-type -Werror=overflow -Werror=int-conversion -Werror=incompatible-pointer-types -Werror=misleading-indentation -Werror=missing-include-dirs -Werror=aggregate-return -Werror=switch-default -Wswitch-enum -Wno-missing-field-initializers -Wno-error=missing-field-initializers -Werror=format=2 -Werror=format-security -Werror=format-nonliteral -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/bubblewrap-0.11.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -MD -MQ tests/try-syscall.p/try-syscall.c.o -MF tests/try-syscall.p/try-syscall.c.o.d -o tests/try-syscall.p/try-syscall.c.o -c ../tests/try-syscall.c
 [2/11] cc  -o tests/try-syscall tests/try-syscall.p/try-syscall.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,-z,relro -Wl,-z,now -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/bubblewrap-0.11.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2
 [3/11] cc -Ibwrap.p -I. -I.. -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -D_GNU_SOURCE -Werror=shadow -Werror=empty-body -Werror=strict-prototypes -Werror=missing-prototypes -Werror=implicit-function-declaration -Werror=pointer-arith -Werror=init-self -Werror=missing-declarations -Werror=return-type -Werror=overflow -Werror=int-conversion -Werror=incompatible-pointer-types -Werror=misleading-indentation -Werror=missing-include-dirs -Werror=aggregate-return -Werror=switch-default -Wswitch-enum -Wno-missing-field-initializers -Wno-error=missing-field-initializers -Werror=format=2 -Werror=format-security -Werror=format-nonliteral -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/bubblewrap-0.11.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -MD -MQ bwrap.p/network.c.o -MF bwrap.p/network.c.o.d -o bwrap.p/network.c.o -c ../network.c
@@ -728,14 +764,14 @@
 # sem_open(), but bubblewrap runs in an environment where that
 # can't work.
 env -u LD_PRELOAD dh_auto_test
-	cd obj-i686-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb LC_ALL=C.UTF-8 MESON_TESTTHREADS=11 meson test
+	cd obj-i686-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb LC_ALL=C.UTF-8 MESON_TESTTHREADS=21 meson test
 ninja: Entering directory `/build/reproducible-path/bubblewrap-0.11.0/obj-i686-linux-gnu'
 ninja: no work to do.
-1/5 test-utils                OK              0.03s   26 subtests passed
-2/5 test-run.sh               SKIP            0.04s
-3/5 test-specifying-pidns.sh  SKIP            0.04s
-4/5 test-specifying-userns.sh SKIP            0.04s
-5/5 test-seccomp.py           SKIP            0.12s
+1/5 test-utils                OK              0.02s   26 subtests passed
+2/5 test-seccomp.py           SKIP            0.08s
+3/5 test-specifying-pidns.sh  SKIP            0.13s
+4/5 test-specifying-userns.sh SKIP            0.13s
+5/5 test-run.sh               SKIP            0.13s
 
 Ok:                 1   
 Expected Fail:      0   
@@ -777,8 +813,8 @@
    dh_gencontrol -O--buildsystem=meson\+ninja
    dh_md5sums -O--buildsystem=meson\+ninja
    dh_builddeb -O--buildsystem=meson\+ninja
-dpkg-deb: building package 'bubblewrap' in '../bubblewrap_0.11.0-2_i386.deb'.
 dpkg-deb: building package 'bubblewrap-dbgsym' in '../bubblewrap-dbgsym_0.11.0-2_i386.deb'.
+dpkg-deb: building package 'bubblewrap' in '../bubblewrap_0.11.0-2_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../bubblewrap_0.11.0-2_i386.buildinfo
  dpkg-genchanges --build=binary -O../bubblewrap_0.11.0-2_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -786,12 +822,14 @@
 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/6733/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/6733/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/32178 and its subdirectories
-I: Current time: Tue Dec 31 08:47:00 -12 2024
-I: pbuilder-time-stamp: 1735678020
+I: removing directory /srv/workspace/pbuilder/6733 and its subdirectories
+I: Current time: Tue Feb  3 17:10:56 +14 2026
+I: pbuilder-time-stamp: 1770088256