Diff of the two buildlogs:

--
--- b1/build.log	2025-02-02 15:36:24.277207201 +0000
+++ b2/build.log	2025-02-02 15:43:58.612577846 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Feb  2 03:29:54 -12 2025
-I: pbuilder-time-stamp: 1738510194
+I: Current time: Mon Feb  3 05:36:35 +14 2025
+I: pbuilder-time-stamp: 1738510595
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-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/32529/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/16901/tmp/hooks/D01_modify_environment starting
+debug: Running on cbxi4a.
+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  2 15:37 /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/16901/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/16901/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='a4876af648ec49628f4d06a2842da498'
-  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='32529'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=f7d055b98c4a4805a091e6c23b0e30fe
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=16901
   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.WKJcWYzp/pbuilderrc_2OZ9 --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.WKJcWYzp/b1 --logfile b1/build.log golang-github-powerman-check_1.8.0-2.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.WKJcWYzp/pbuilderrc_8nn2 --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.WKJcWYzp/b2 --logfile b2/build.log golang-github-powerman-check_1.8.0-2.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux virt64b 6.1.0-30-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-23-armmp #1 SMP Debian 6.1.99-1 (2024-07-15) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/32529/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/16901/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 unstable/main armhf golang-golang-x-tools-dev all 1:0.23.0+ds-1 [1593 kB]
 Get: 85 http://deb.debian.org/debian unstable/main armhf golang-github-smartystreets-goconvey-dev all 1.6.4+dfsg-1 [51.6 kB]
 Get: 86 http://deb.debian.org/debian unstable/main armhf tzdata-legacy all 2025a-1 [178 kB]
-Fetched 88.5 MB in 3s (29.6 MB/s)
+Fetched 88.5 MB in 5s (19.3 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 ... 19565 files and directories currently installed.)
@@ -501,8 +533,8 @@
 Setting up tzdata (2025a-1) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Feb  2 15:33:05 UTC 2025.
-Universal Time is now:  Sun Feb  2 15:33:05 UTC 2025.
+Local time is now:      Sun Feb  2 15:39:11 UTC 2025.
+Universal Time is now:  Sun Feb  2 15:39:11 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/16901/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/16901/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
@@ -594,16 +630,16 @@
    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 3 github.com/powerman/check
-internal/goarch
+	cd _build && go install -trimpath -v -p 4 github.com/powerman/check
+internal/byteorder
 internal/unsafeheader
+internal/goarch
 internal/cpu
+internal/coverage/rtcov
 internal/abi
-internal/byteorder
 internal/chacha8rand
-internal/bytealg
-internal/coverage/rtcov
 internal/godebugs
+internal/bytealg
 internal/goexperiment
 internal/goos
 internal/profilerecord
@@ -612,130 +648,130 @@
 internal/stringslite
 runtime/internal/math
 runtime/internal/sys
-internal/runtime/exithook
 internal/race
 sync/atomic
 unicode
+internal/runtime/exithook
 unicode/utf8
 cmp
 encoding
-runtime
 math/bits
-math
 internal/itoa
 internal/asan
 internal/msan
 unicode/utf16
+math
 google.golang.org/protobuf/internal/flags
 google.golang.org/protobuf/internal/set
 log/internal
 google.golang.org/grpc/serviceconfig
 internal/nettrace
-internal/reflectlite
+runtime
 iter
+internal/reflectlite
+internal/weak
 sync
 slices
-internal/weak
-internal/bisect
 internal/testlog
 google.golang.org/protobuf/internal/pragma
+internal/bisect
+internal/singleflight
+runtime/cgo
 errors
 sort
-internal/godebug
 io
 strconv
 internal/oserror
-bytes
 path
+bytes
+internal/godebug
 syscall
 strings
 reflect
 regexp/syntax
-regexp
 time
 internal/syscall/unix
 internal/syscall/execenv
+regexp
 bufio
 github.com/smartystreets/goconvey/convey/gotest
-encoding/binary
-internal/fmtsort
+hash
+hash/fnv
+hash/crc32
+vendor/golang.org/x/net/dns/dnsmessage
+math/rand/v2
+internal/concurrent
 io/fs
 internal/poll
+encoding/binary
+internal/fmtsort
 internal/filepathlite
-encoding/base64
 github.com/powerman/deepequal
-golang.org/x/sys/unix
 context
 os
-hash
-hash/fnv
+encoding/base64
+golang.org/x/sys/unix
 embed
+unique
 google.golang.org/protobuf/internal/editiondefaults
-hash/crc32
-vendor/golang.org/x/net/dns/dnsmessage
-fmt
+math/rand
+net/netip
 google.golang.org/protobuf/internal/detrand
+fmt
 io/ioutil
-internal/singleflight
-math/rand/v2
-internal/concurrent
-unique
-encoding/json
+path/filepath
+net
+internal/sysinfo
 flag
+encoding/json
 encoding/hex
-github.com/pkg/errors
 github.com/davecgh/go-spew/spew
+github.com/pkg/errors
 github.com/pmezard/go-difflib/difflib
+github.com/smartystreets/goconvey/convey/reporting
 google.golang.org/protobuf/internal/errors
+go/token
 google.golang.org/protobuf/encoding/protowire
 google.golang.org/protobuf/reflect/protoreflect
-go/token
-github.com/smartystreets/goconvey/convey/reporting
 compress/flate
 google.golang.org/protobuf/internal/version
 google.golang.org/grpc/internal/grpclog
 log
+google.golang.org/grpc/grpclog
+compress/gzip
 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/internal/genid
 google.golang.org/protobuf/internal/encoding/text
+google.golang.org/protobuf/internal/genid
 google.golang.org/protobuf/internal/order
 google.golang.org/protobuf/reflect/protoregistry
 google.golang.org/protobuf/runtime/protoiface
-compress/gzip
-google.golang.org/grpc/grpclog
-google.golang.org/protobuf/internal/encoding/defval
-google.golang.org/protobuf/proto
-net/netip
 google.golang.org/grpc/connectivity
-runtime/cgo
-google.golang.org/protobuf/internal/filedesc
-google.golang.org/protobuf/encoding/prototext
-path/filepath
-internal/sysinfo
-math/rand
 runtime/debug
-google.golang.org/protobuf/internal/encoding/tag
+google.golang.org/protobuf/internal/encoding/defval
+google.golang.org/protobuf/proto
 runtime/trace
 testing
+google.golang.org/protobuf/encoding/prototext
+google.golang.org/protobuf/internal/filedesc
+google.golang.org/protobuf/internal/encoding/tag
 google.golang.org/protobuf/internal/impl
-net
+google.golang.org/grpc/internal
+google.golang.org/grpc/codes
 google.golang.org/protobuf/internal/filetype
 google.golang.org/protobuf/runtime/protoimpl
-google.golang.org/protobuf/types/known/anypb
 google.golang.org/protobuf/protoadapt
+google.golang.org/protobuf/types/known/anypb
 google.golang.org/genproto/googleapis/rpc/status
-google.golang.org/grpc/internal
-google.golang.org/grpc/codes
 google.golang.org/grpc/internal/status
 google.golang.org/grpc/status
 github.com/powerman/check
    dh_auto_test -O--builddirectory=_build -O--buildsystem=golang
-	cd _build && go test -vet=off -v -p 3 github.com/powerman/check
+	cd _build && go test -vet=off -v -p 4 github.com/powerman/check
 === RUN   TestDump
---- PASS: TestDump (0.00s)
+--- PASS: TestDump (0.01s)
 === RUN   TestFormat
 --- PASS: TestFormat (0.00s)
 === RUN   TestCaller
@@ -753,17 +789,17 @@
 === RUN   TestCheckerNilTrue
 --- PASS: TestCheckerNilTrue (0.01s)
 === RUN   TestCheckerEqual
---- PASS: TestCheckerEqual (0.02s)
+--- PASS: TestCheckerEqual (0.04s)
 === RUN   TestCheckerBytesEqual
 --- PASS: TestCheckerBytesEqual (0.00s)
 === RUN   TestCheckerMatch
---- PASS: TestCheckerMatch (0.12s)
+--- PASS: TestCheckerMatch (0.18s)
 === RUN   TestCheckerContains
 --- PASS: TestCheckerContains (0.00s)
 === RUN   TestCheckerHasKey
 --- PASS: TestCheckerHasKey (0.00s)
 === RUN   TestCheckerZero
---- PASS: TestCheckerZero (0.00s)
+--- PASS: TestCheckerZero (0.01s)
 === RUN   TestCheckerLen
 === RUN   TestCheckerLen/#00
 === RUN   TestCheckerLen/#01
@@ -815,7 +851,7 @@
 === RUN   TestCheckerLen/#47
 === RUN   TestCheckerLen/#48
 === RUN   TestCheckerLen/#49
---- PASS: TestCheckerLen (0.01s)
+--- PASS: TestCheckerLen (0.02s)
     --- PASS: TestCheckerLen/#00 (0.00s)
     --- PASS: TestCheckerLen/#01 (0.00s)
     --- PASS: TestCheckerLen/#02 (0.00s)
@@ -877,9 +913,9 @@
 === CONT  TestCheckerOrdered/Between
 === CONT  TestCheckerOrdered/Greater
 --- PASS: TestCheckerOrdered (0.00s)
-    --- PASS: TestCheckerOrdered/Between (0.00s)
-    --- PASS: TestCheckerOrdered/Greater (0.00s)
     --- PASS: TestCheckerOrdered/Less (0.01s)
+    --- PASS: TestCheckerOrdered/Greater (0.01s)
+    --- PASS: TestCheckerOrdered/Between (0.01s)
 === RUN   TestCheckerApprox
 === RUN   TestCheckerApprox/Delta
 === PAUSE TestCheckerApprox/Delta
@@ -888,8 +924,8 @@
 === CONT  TestCheckerApprox/Delta
 === CONT  TestCheckerApprox/SMAPE
 --- PASS: TestCheckerApprox (0.00s)
-    --- PASS: TestCheckerApprox/SMAPE (0.00s)
     --- PASS: TestCheckerApprox/Delta (0.01s)
+    --- PASS: TestCheckerApprox/SMAPE (0.01s)
 === RUN   TestCheckerSubstring
 === RUN   TestCheckerSubstring/HasPrefix
 === PAUSE TestCheckerSubstring/HasPrefix
@@ -898,12 +934,12 @@
 === CONT  TestCheckerSubstring/HasPrefix
 === CONT  TestCheckerSubstring/HasSuffix
 --- PASS: TestCheckerSubstring (0.00s)
-    --- PASS: TestCheckerSubstring/HasSuffix (0.00s)
     --- PASS: TestCheckerSubstring/HasPrefix (0.01s)
+    --- PASS: TestCheckerSubstring/HasSuffix (0.01s)
 === RUN   TestJSONEqual
---- PASS: TestJSONEqual (0.00s)
+--- PASS: TestJSONEqual (0.01s)
 === RUN   TestHasType
---- PASS: TestHasType (0.14s)
+--- PASS: TestHasType (0.15s)
 === RUN   TestCheckers
 === RUN   TestCheckers/Err
 === PAUSE TestCheckers/Err
@@ -914,11 +950,11 @@
 === RUN   TestCheckers/Implements
 === PAUSE TestCheckers/Implements
 === CONT  TestCheckers/Err
+=== CONT  TestCheckers/Implements
+=== CONT  TestCheckers/Panic
+=== CONT  TestCheckers/PanicMatch
 === RUN   TestCheckers/Err/#00
 === RUN   TestCheckers/Err/#01
-=== CONT  TestCheckers/PanicMatch
-=== CONT  TestCheckers/Panic
-=== CONT  TestCheckers/Implements
 === RUN   TestCheckers/Err/#02
 === RUN   TestCheckers/Err/#03
 === RUN   TestCheckers/Err/#04
@@ -948,10 +984,10 @@
 === RUN   TestCheckers/Err/#28
 === RUN   TestCheckers/Err/#29
 --- PASS: TestCheckers (0.00s)
-    --- PASS: TestCheckers/Panic (0.00s)
     --- PASS: TestCheckers/Implements (0.00s)
+    --- PASS: TestCheckers/Panic (0.00s)
     --- PASS: TestCheckers/PanicMatch (0.00s)
-    --- PASS: TestCheckers/Err (0.01s)
+    --- PASS: TestCheckers/Err (0.02s)
         --- PASS: TestCheckers/Err/#00 (0.00s)
         --- PASS: TestCheckers/Err/#01 (0.00s)
         --- PASS: TestCheckers/Err/#02 (0.00s)
@@ -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	0.410s
+ok  	github.com/powerman/check	0.528s
    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/16901/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/16901/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/32529 and its subdirectories
-I: Current time: Sun Feb  2 03:36:20 -12 2025
-I: pbuilder-time-stamp: 1738510580
+I: removing directory /srv/workspace/pbuilder/16901 and its subdirectories
+I: Current time: Mon Feb  3 05:43:54 +14 2025
+I: pbuilder-time-stamp: 1738511034