Diff of the two buildlogs:

--
--- b1/build.log	2025-01-12 02:37:26.795004319 +0000
+++ b2/build.log	2025-01-12 02:38:43.951481481 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Feb 13 20:59:44 -12 2026
-I: pbuilder-time-stamp: 1771059584
+I: Current time: Sun Jan 12 16:37:28 +14 2025
+I: pbuilder-time-stamp: 1736649448
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -23,54 +23,86 @@
 dpkg-source: info: unpacking golang-github-rickb777-date_1.20.1-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1769/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/30535/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos2-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 Jan 12 02:37 /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/30535/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/30535/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=22 '
-  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=10 '
+  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='7dcebe09dede41ee8d0f69210ab25446'
-  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='1769'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=b7de3695415e48a7b1dca35d3c1e195c
+  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=30535
   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.Xdu1IlPO/pbuilderrc_QRVu --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.Xdu1IlPO/b1 --logfile b1/build.log golang-github-rickb777-date_1.20.1-1.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://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.Xdu1IlPO/pbuilderrc_h5qE --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.Xdu1IlPO/b2 --logfile b2/build.log golang-github-rickb777-date_1.20.1-1.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos6-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  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1769/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/30535/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -166,7 +198,7 @@
 Get: 46 http://deb.debian.org/debian unstable/main i386 golang-golang-x-net-dev all 1:0.27.0-1 [898 kB]
 Get: 47 http://deb.debian.org/debian unstable/main i386 golang-gopkg-yaml.v3-dev all 3.0.1-3 [74.3 kB]
 Get: 48 http://deb.debian.org/debian unstable/main i386 golang-gomega-dev all 1.34.2-2 [160 kB]
-Fetched 73.3 MB in 1s (109 MB/s)
+Fetched 73.3 MB in 1s (96.5 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package tzdata.
 (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 ... 19835 files and directories currently installed.)
@@ -332,8 +364,8 @@
 Setting up tzdata (2024b-5) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Feb 14 09:00:03 UTC 2026.
-Universal Time is now:  Sat Feb 14 09:00:03 UTC 2026.
+Local time is now:      Sun Jan 12 02:38:03 UTC 2025.
+Universal Time is now:  Sun Jan 12 02:38:03 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -379,7 +411,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-rickb777-date-1.20.1/ && 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  > ../golang-github-rickb777-date_1.20.1-1_source.changes
+I: user script /srv/workspace/pbuilder/30535/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/30535/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-rickb777-date-1.20.1/ && 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  > ../golang-github-rickb777-date_1.20.1-1_source.changes
 dpkg-buildpackage: info: source package golang-github-rickb777-date
 dpkg-buildpackage: info: source version 1.20.1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -397,47 +433,47 @@
    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 22 github.com/rickb777/date github.com/rickb777/date/clock github.com/rickb777/date/gregorian github.com/rickb777/date/period github.com/rickb777/date/timespan github.com/rickb777/date/view
+	cd _build && go install -trimpath -v -p 10 github.com/rickb777/date github.com/rickb777/date/clock github.com/rickb777/date/gregorian github.com/rickb777/date/period github.com/rickb777/date/timespan github.com/rickb777/date/view
 internal/profilerecord
-internal/itoa
-internal/msan
-unicode/utf8
-cmp
-internal/goos
-internal/race
-internal/byteorder
-internal/asan
-unicode
-math/bits
-sync/atomic
+internal/unsafeheader
+internal/coverage/rtcov
 internal/godebugs
 internal/goarch
+internal/byteorder
+internal/goos
+internal/goexperiment
 internal/cpu
-internal/unsafeheader
 internal/runtime/atomic
-internal/coverage/rtcov
+internal/race
 internal/runtime/syscall
-internal/goexperiment
 runtime/internal/math
-runtime/internal/sys
 internal/abi
+runtime/internal/sys
+sync/atomic
+unicode/utf8
+internal/asan
 internal/chacha8rand
-math
-internal/bytealg
+unicode
 internal/runtime/exithook
+internal/bytealg
+internal/itoa
+internal/msan
+cmp
+math/bits
 internal/stringslite
+math
 runtime
-iter
 internal/reflectlite
+iter
 sync
 slices
-internal/testlog
 internal/bisect
+internal/testlog
+internal/godebug
 errors
 internal/oserror
-io
 path
-internal/godebug
+io
 strconv
 syscall
 bytes
@@ -446,13 +482,13 @@
 internal/syscall/execenv
 internal/syscall/unix
 time
-github.com/rickb777/date/gregorian
 context
 io/fs
+github.com/rickb777/date/gregorian
 internal/poll
 internal/filepathlite
-internal/fmtsort
 os
+internal/fmtsort
 fmt
 github.com/rickb777/plural
 database/sql/driver
@@ -462,7 +498,7 @@
 github.com/rickb777/date/view
 github.com/rickb777/date/timespan
    dh_auto_test -O--builddirectory=_build -O--buildsystem=golang
-	cd _build && go test -vet=off -v -p 22 github.com/rickb777/date github.com/rickb777/date/clock github.com/rickb777/date/gregorian github.com/rickb777/date/period github.com/rickb777/date/timespan github.com/rickb777/date/view
+	cd _build && go test -vet=off -v -p 10 github.com/rickb777/date github.com/rickb777/date/clock github.com/rickb777/date/gregorian github.com/rickb777/date/period github.com/rickb777/date/timespan github.com/rickb777/date/view
 === RUN   TestDate_New
 --- PASS: TestDate_New (0.00s)
 === RUN   Test_New_and_Add
@@ -544,7 +580,7 @@
 === RUN   ExampleDate_FormatISO
 --- PASS: ExampleDate_FormatISO (0.00s)
 PASS
-ok  	github.com/rickb777/date	0.006s
+ok  	github.com/rickb777/date	0.011s
 === RUN   TestClockHoursMinutesSeconds
 --- PASS: TestClockHoursMinutesSeconds (0.00s)
 === RUN   TestClockSinceMidnight
@@ -588,7 +624,7 @@
 === RUN   TestClockScanWithNil
 --- PASS: TestClockScanWithNil (0.00s)
 PASS
-ok  	github.com/rickb777/date/clock	0.004s
+ok  	github.com/rickb777/date/clock	0.007s
 === RUN   TestIsLeap
 --- PASS: TestIsLeap (0.00s)
 === RUN   TestDaysInYear
@@ -596,7 +632,7 @@
 === RUN   TestDaysIn
 --- PASS: TestDaysIn (0.00s)
 PASS
-ok  	github.com/rickb777/date/gregorian	0.003s
+ok  	github.com/rickb777/date/gregorian	0.004s
 === RUN   TestPeriodScale
 --- PASS: TestPeriodScale (0.00s)
 === RUN   TestPeriodAdd
@@ -660,7 +696,7 @@
 === RUN   TestPeriodScan_problem_type
 --- PASS: TestPeriodScan_problem_type (0.00s)
 PASS
-ok  	github.com/rickb777/date/period	0.016s
+ok  	github.com/rickb777/date/period	0.026s
 === RUN   TestNewDateRangeOf
 --- PASS: TestNewDateRangeOf (0.00s)
 === RUN   TestNewDateRangeWithNormalise
@@ -750,7 +786,7 @@
 === RUN   TestConversion3
 --- PASS: TestConversion3 (0.00s)
 PASS
-ok  	github.com/rickb777/date/timespan	0.005s
+ok  	github.com/rickb777/date/timespan	0.007s
 === RUN   TestBasicFormatting
 --- PASS: TestBasicFormatting (0.00s)
 === RUN   TestZeroFormatting
@@ -770,7 +806,7 @@
 === RUN   TestTextMarshalling
 --- PASS: TestTextMarshalling (0.00s)
 PASS
-ok  	github.com/rickb777/date/view	0.003s
+ok  	github.com/rickb777/date/view	0.005s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -797,12 +833,14 @@
 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/30535/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/30535/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/1769 and its subdirectories
-I: Current time: Fri Feb 13 21:00:25 -12 2026
-I: pbuilder-time-stamp: 1771059625
+I: removing directory /srv/workspace/pbuilder/30535 and its subdirectories
+I: Current time: Sun Jan 12 16:38:43 +14 2025
+I: pbuilder-time-stamp: 1736649523