Diff of the two buildlogs:

--
--- b1/build.log	2025-02-04 19:43:24.995543702 +0000
+++ b2/build.log	2025-02-04 19:45:45.537170362 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Mar  9 14:04:59 -12 2026
-I: pbuilder-time-stamp: 1773108299
+I: Current time: Wed Feb  5 09:43:28 +14 2025
+I: pbuilder-time-stamp: 1738698208
 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 golang-github-powerman-check_1.8.0-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2849641/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/537535/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-arm64.
+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  4 19:43 /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/537535/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/537535/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='5ebcf2f144234bb2a744e69762946d87'
-  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='2849641'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=a5e0b01e8667454f8293a0b1e933d7b0
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=537535
   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.kd7L4GyX/pbuilderrc_Zvuf --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.kd7L4GyX/b1 --logfile b1/build.log golang-github-powerman-check_1.8.0-2.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.kd7L4GyX/pbuilderrc_ishm --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.kd7L4GyX/b2 --logfile b2/build.log golang-github-powerman-check_1.8.0-2.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink03-arm64 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2849641/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/537535/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -211,7 +243,7 @@
 Get: 84 http://deb.debian.org/debian trixie/main arm64 golang-golang-x-tools-dev all 1:0.23.0+ds-1 [1593 kB]
 Get: 85 http://deb.debian.org/debian trixie/main arm64 golang-github-smartystreets-goconvey-dev all 1.6.4+dfsg-1 [51.6 kB]
 Get: 86 http://deb.debian.org/debian trixie/main arm64 tzdata-legacy all 2024b-6 [177 kB]
-Fetched 88.6 MB in 1s (165 MB/s)
+Fetched 88.6 MB in 1s (70.5 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 ... 19957 files and directories currently installed.)
@@ -501,8 +533,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Mar 10 02:05:39 UTC 2026.
-Universal Time is now:  Tue Mar 10 02:05:39 UTC 2026.
+Local time is now:      Tue Feb  4 19:44:24 UTC 2025.
+Universal Time is now:  Tue Feb  4 19:44:24 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up golang-github-davecgh-go-spew-dev (1.1.1-3) ...
@@ -576,7 +608,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-powerman-check-1.8.0/ && 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  > ../golang-github-powerman-check_1.8.0-2_source.changes
+I: user script /srv/workspace/pbuilder/537535/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/537535/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-powerman-check-1.8.0/ && 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  > ../golang-github-powerman-check_1.8.0-2_source.changes
 dpkg-buildpackage: info: source package golang-github-powerman-check
 dpkg-buildpackage: info: source version 1.8.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -595,127 +631,127 @@
    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 12 github.com/powerman/check
-internal/goos
-internal/profilerecord
-internal/unsafeheader
-internal/coverage/rtcov
+internal/goarch
 internal/godebugs
+internal/coverage/rtcov
 internal/byteorder
+internal/unsafeheader
 internal/goexperiment
-internal/goarch
+unicode
+internal/goos
 internal/cpu
+runtime/internal/math
+sync/atomic
+unicode/utf8
 cmp
-encoding
+internal/race
+internal/profilerecord
+internal/abi
+internal/chacha8rand
 internal/runtime/syscall
-unicode
+encoding
+runtime/internal/sys
 math/bits
 internal/itoa
-internal/race
-sync/atomic
-internal/chacha8rand
-runtime/internal/math
-unicode/utf8
 internal/asan
 internal/msan
 unicode/utf16
-internal/abi
-runtime/internal/sys
-math
 google.golang.org/protobuf/internal/flags
-google.golang.org/protobuf/internal/set
 log/internal
 google.golang.org/grpc/serviceconfig
 internal/nettrace
+google.golang.org/protobuf/internal/set
+math
 internal/bytealg
 internal/runtime/atomic
 internal/runtime/exithook
 internal/stringslite
 runtime
 internal/reflectlite
-sync
 iter
+sync
 internal/weak
 slices
 internal/bisect
-internal/testlog
 google.golang.org/protobuf/internal/pragma
 internal/singleflight
+internal/testlog
 runtime/cgo
-internal/godebug
-errors
 sort
+errors
+internal/godebug
 io
-internal/oserror
 strconv
-vendor/golang.org/x/net/dns/dnsmessage
+internal/oserror
 path
+vendor/golang.org/x/net/dns/dnsmessage
 math/rand/v2
-bytes
 syscall
+bytes
 math/rand
-reflect
 strings
 hash
 internal/concurrent
+reflect
 hash/fnv
 hash/crc32
 unique
-net/netip
 regexp/syntax
 bufio
 github.com/smartystreets/goconvey/convey/gotest
-regexp
+net/netip
 time
 internal/syscall/unix
 internal/syscall/execenv
+regexp
 io/fs
-internal/poll
 context
-encoding/binary
-internal/fmtsort
-github.com/powerman/deepequal
+internal/poll
 internal/filepathlite
 embed
 google.golang.org/protobuf/internal/editiondefaults
+encoding/binary
+internal/fmtsort
 os
+github.com/powerman/deepequal
 encoding/base64
 golang.org/x/sys/unix
 fmt
 google.golang.org/protobuf/internal/detrand
 io/ioutil
-net
 path/filepath
 internal/sysinfo
+net
 encoding/json
 flag
 encoding/hex
+github.com/pkg/errors
 github.com/pmezard/go-difflib/difflib
 google.golang.org/protobuf/internal/errors
-github.com/pkg/errors
 go/token
-google.golang.org/grpc/internal/grpclog
-google.golang.org/protobuf/internal/version
 compress/flate
+google.golang.org/protobuf/internal/version
+google.golang.org/grpc/internal/grpclog
 log
+github.com/davecgh/go-spew/spew
 google.golang.org/protobuf/encoding/protowire
 runtime/debug
-github.com/davecgh/go-spew/spew
 runtime/trace
 google.golang.org/protobuf/reflect/protoreflect
-testing
 compress/gzip
+testing
 google.golang.org/protobuf/internal/descfmt
 google.golang.org/protobuf/internal/descopts
-google.golang.org/protobuf/internal/strs
 google.golang.org/protobuf/internal/encoding/messageset
+google.golang.org/protobuf/runtime/protoiface
 google.golang.org/protobuf/internal/genid
+google.golang.org/protobuf/internal/strs
 google.golang.org/protobuf/internal/order
-google.golang.org/protobuf/runtime/protoiface
 google.golang.org/protobuf/reflect/protoregistry
 google.golang.org/protobuf/internal/encoding/text
-google.golang.org/protobuf/proto
 github.com/smartystreets/goconvey/convey/reporting
 google.golang.org/grpc/grpclog
+google.golang.org/protobuf/proto
 google.golang.org/protobuf/internal/encoding/defval
 google.golang.org/grpc/connectivity
 google.golang.org/protobuf/internal/filedesc
@@ -724,8 +760,8 @@
 google.golang.org/protobuf/internal/impl
 google.golang.org/protobuf/internal/filetype
 google.golang.org/grpc/internal
-google.golang.org/grpc/codes
 google.golang.org/protobuf/runtime/protoimpl
+google.golang.org/grpc/codes
 google.golang.org/protobuf/types/known/anypb
 google.golang.org/protobuf/protoadapt
 google.golang.org/genproto/googleapis/rpc/status
@@ -735,7 +771,7 @@
    dh_auto_test -O--builddirectory=_build -O--buildsystem=golang
 	cd _build && go test -vet=off -v -p 12 github.com/powerman/check
 === RUN   TestDump
---- PASS: TestDump (0.00s)
+--- PASS: TestDump (0.01s)
 === RUN   TestFormat
 --- PASS: TestFormat (0.00s)
 === RUN   TestCaller
@@ -753,11 +789,11 @@
 === RUN   TestCheckerNilTrue
 --- PASS: TestCheckerNilTrue (0.00s)
 === RUN   TestCheckerEqual
---- PASS: TestCheckerEqual (0.01s)
+--- PASS: TestCheckerEqual (0.02s)
 === RUN   TestCheckerBytesEqual
 --- PASS: TestCheckerBytesEqual (0.00s)
 === RUN   TestCheckerMatch
---- PASS: TestCheckerMatch (0.02s)
+--- PASS: TestCheckerMatch (0.05s)
 === RUN   TestCheckerContains
 --- PASS: TestCheckerContains (0.00s)
 === RUN   TestCheckerHasKey
@@ -815,7 +851,7 @@
 === RUN   TestCheckerLen/#47
 === RUN   TestCheckerLen/#48
 === RUN   TestCheckerLen/#49
---- PASS: TestCheckerLen (0.01s)
+--- PASS: TestCheckerLen (0.00s)
     --- PASS: TestCheckerLen/#00 (0.00s)
     --- PASS: TestCheckerLen/#01 (0.00s)
     --- PASS: TestCheckerLen/#02 (0.00s)
@@ -878,8 +914,8 @@
 === CONT  TestCheckerOrdered/Greater
 --- PASS: TestCheckerOrdered (0.00s)
     --- PASS: TestCheckerOrdered/Less (0.00s)
-    --- PASS: TestCheckerOrdered/Between (0.00s)
     --- PASS: TestCheckerOrdered/Greater (0.00s)
+    --- PASS: TestCheckerOrdered/Between (0.02s)
 === RUN   TestCheckerApprox
 === RUN   TestCheckerApprox/Delta
 === PAUSE TestCheckerApprox/Delta
@@ -901,9 +937,9 @@
     --- PASS: TestCheckerSubstring/HasPrefix (0.00s)
     --- PASS: TestCheckerSubstring/HasSuffix (0.00s)
 === RUN   TestJSONEqual
---- PASS: TestJSONEqual (0.00s)
+--- PASS: TestJSONEqual (0.01s)
 === RUN   TestHasType
---- PASS: TestHasType (0.04s)
+--- PASS: TestHasType (0.07s)
 === RUN   TestCheckers
 === RUN   TestCheckers/Err
 === PAUSE TestCheckers/Err
@@ -1092,7 +1128,7 @@
   checks:     2 passed     2 todo          	TestMustAll
   checks:     4 passed     5 todo          	TestTODO
   checks:  8822 passed  3948 todo  0 failed	(total)
-ok  	github.com/powerman/check	0.136s
+ok  	github.com/powerman/check	0.240s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -1119,12 +1155,14 @@
 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/537535/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/537535/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/2849641 and its subdirectories
-I: Current time: Mon Mar  9 14:06:23 -12 2026
-I: pbuilder-time-stamp: 1773108383
+I: removing directory /srv/workspace/pbuilder/537535 and its subdirectories
+I: Current time: Wed Feb  5 09:45:44 +14 2025
+I: pbuilder-time-stamp: 1738698344