Diff of the two buildlogs:

--
--- b1/build.log	2025-02-24 23:27:24.456804738 +0000
+++ b2/build.log	2025-02-25 01:04:01.225404343 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Mar 29 17:27:34 -12 2026
-I: pbuilder-time-stamp: 1774848454
+I: Current time: Tue Feb 25 13:27:28 +14 2025
+I: pbuilder-time-stamp: 1740439648
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -22,52 +22,84 @@
 dpkg-source: info: unpacking nwg-bar_0.1.6-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1353221/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1992984/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos1-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 Feb 24 23:27 /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/1992984/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1992984/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='trixie'
-  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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='c96dbd97fb79432c8398686d251c2515'
-  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='1353221'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d6cfcee426e04f55849a96d41aeb5c90
+  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=1992984
   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.Wkc0DMLJ/pbuilderrc_W1bk --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.Wkc0DMLJ/b1 --logfile b1/build.log nwg-bar_0.1.6-1.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://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.Wkc0DMLJ/pbuilderrc_F9J9 --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.Wkc0DMLJ/b2 --logfile b2/build.log nwg-bar_0.1.6-1.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  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 ionos15-amd64 6.12.9+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.9-1~bpo12+1 (2025-01-19) 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 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1353221/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1992984/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -442,7 +474,7 @@
 Get: 323 http://deb.debian.org/debian trixie/main amd64 golang-golang-x-sync-dev all 0.7.0-1 [19.0 kB]
 Get: 324 http://deb.debian.org/debian trixie/main amd64 golang-github-joshuarubin-lifecycle-dev all 1.1.4-2 [8128 B]
 Get: 325 http://deb.debian.org/debian trixie/main amd64 golang-github-joshuarubin-go-sway-dev all 1.2.0-2 [13.3 kB]
-Fetched 188 MB in 8s (24.5 MB/s)
+Fetched 188 MB in 18s (10.3 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libsystemd-shared: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 ... 19802 files and directories currently installed.)
@@ -1503,8 +1535,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Mar 30 05:29:36 UTC 2026.
-Universal Time is now:  Mon Mar 30 05:29:36 UTC 2026.
+Local time is now:      Mon Feb 24 23:33:26 UTC 2025.
+Universal Time is now:  Mon Feb 24 23:33:26 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libxcb-present0:amd64 (1.17.0-2+b1) ...
@@ -1791,7 +1823,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/nwg-bar-0.1.6/ && 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  > ../nwg-bar_0.1.6-1_source.changes
+I: user script /srv/workspace/pbuilder/1992984/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/1992984/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/nwg-bar-0.1.6/ && 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  > ../nwg-bar_0.1.6-1_source.changes
 dpkg-buildpackage: info: source package nwg-bar
 dpkg-buildpackage: info: source version 0.1.6-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1809,91 +1845,91 @@
    dh_autoreconf -O--builddirectory=_build -O--buildsystem=golang
    dh_auto_configure -O--builddirectory=_build -O--buildsystem=golang
    dh_auto_build -O--builddirectory=_build -O--buildsystem=golang
-	cd _build && go install -trimpath -v -p 42 github.com/nwg-piotr/nwg-bar
+	cd _build && go install -trimpath -v -p 20 github.com/nwg-piotr/nwg-bar
+unicode/utf8
 encoding
-github.com/gotk3/gotk3/internal/slab
-internal/itoa
-internal/byteorder
-internal/nettrace
-log/internal
 math/bits
-internal/asan
+cmp
+internal/godebugs
 internal/msan
-unicode/utf8
-internal/unsafeheader
 internal/goarch
-internal/goos
-cmp
+internal/unsafeheader
+internal/byteorder
 internal/coverage/rtcov
-internal/profilerecord
+internal/goos
+internal/itoa
+internal/asan
+unicode
+internal/goexperiment
 sync/atomic
+internal/profilerecord
+unicode/utf16
 internal/runtime/syscall
-internal/runtime/atomic
 internal/cpu
-unicode/utf16
-unicode
-internal/goexperiment
-internal/godebugs
+internal/runtime/atomic
+internal/chacha8rand
 internal/runtime/math
-internal/runtime/sys
 internal/abi
-internal/chacha8rand
-internal/bytealg
+github.com/gotk3/gotk3/internal/slab
+internal/nettrace
+log/internal
+internal/runtime/sys
 internal/runtime/exithook
+internal/bytealg
 math
 internal/stringslite
 internal/race
-internal/sync
 internal/runtime/maps
+internal/sync
 runtime
 internal/reflectlite
-iter
 weak
+iter
 sync
 slices
+errors
+internal/oserror
+vendor/golang.org/x/net/dns/dnsmessage
+path
+strconv
 internal/bisect
-github.com/gotk3/gotk3/internal/callback
+reflect
 internal/testlog
+github.com/gotk3/gotk3/internal/callback
+io
 internal/singleflight
 unique
 runtime/cgo
-errors
-internal/godebug
-io
-internal/oserror
-path
-vendor/golang.org/x/net/dns/dnsmessage
-strconv
 syscall
+internal/godebug
 bytes
-strings
 net/netip
-reflect
+strings
+time
 internal/syscall/execenv
 internal/syscall/unix
-time
+internal/fmtsort
+encoding/binary
+encoding/base64
 context
-io/fs
 internal/poll
+io/fs
 internal/filepathlite
 os
-internal/fmtsort
-encoding/binary
-encoding/base64
-io/ioutil
-os/signal
 fmt
+io/ioutil
 path/filepath
+os/signal
 net
 github.com/allan-simon/go-singleinstance
 os/exec
-golang.org/x/sync/errgroup
+encoding/json
 flag
-runtime/debug
-github.com/gotk3/gotk3/internal/closure
 log
 os/user
-encoding/json
+github.com/gotk3/gotk3/internal/closure
+golang.org/x/sync/errgroup
+runtime/debug
 github.com/joshuarubin/lifecycle
 github.com/gotk3/gotk3/glib
 go.uber.org/atomic
@@ -1906,7 +1942,7 @@
 github.com/dlasky/gotk3-layershell/layershell
 github.com/nwg-piotr/nwg-bar
    dh_auto_test -O--builddirectory=_build -O--buildsystem=golang
-	cd _build && go test -vet=off -v -p 42 github.com/nwg-piotr/nwg-bar
+	cd _build && go test -vet=off -v -p 20 github.com/nwg-piotr/nwg-bar
 ?   	github.com/nwg-piotr/nwg-bar	[no test files]
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
@@ -1937,8 +1973,8 @@
 dpkg-gencontrol: warning: package nwg-bar: substitution variable ${misc:Static-Built-Using} unused, but is defined
    dh_md5sums -O--builddirectory=_build -O--buildsystem=golang
    dh_builddeb -O--builddirectory=_build -O--buildsystem=golang
-dpkg-deb: building package 'nwg-bar' in '../nwg-bar_0.1.6-1_amd64.deb'.
 dpkg-deb: building package 'nwg-bar-dbgsym' in '../nwg-bar-dbgsym_0.1.6-1_amd64.deb'.
+dpkg-deb: building package 'nwg-bar' in '../nwg-bar_0.1.6-1_amd64.deb'.
  dpkg-genbuildinfo --build=binary -O../nwg-bar_0.1.6-1_amd64.buildinfo
  dpkg-genchanges --build=binary -O../nwg-bar_0.1.6-1_amd64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1946,12 +1982,14 @@
 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/1992984/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1992984/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/1353221 and its subdirectories
-I: Current time: Sun Mar 29 17:50:23 -12 2026
-I: pbuilder-time-stamp: 1774849823
+I: removing directory /srv/workspace/pbuilder/1992984 and its subdirectories
+I: Current time: Tue Feb 25 15:03:58 +14 2025
+I: pbuilder-time-stamp: 1740445438