Diff of the two buildlogs:

--
--- b1/build.log	2024-05-22 14:30:33.651178309 +0000
+++ b2/build.log	2024-05-22 14:31:41.236294473 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed May 22 02:29:02 -12 2024
-I: pbuilder-time-stamp: 1716388142
+I: Current time: Wed Jun 25 10:53:35 +14 2025
+I: pbuilder-time-stamp: 1750798415
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -28,54 +28,86 @@
 dpkg-source: info: applying 0001-python3.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/27721/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/64268/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos6-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 Jun 24 20:53 /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/64268/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/64268/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]="21" [3]="1" [4]="release" [5]="i686-pc-linux-gnu")
+  BASH_VERSION='5.2.21(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='0a4a92c958404348892b7a2f67e2531f'
-  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='27721'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=c9feaa9cb0e04fd3ba92c5cd940f579f
+  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=64268
   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.V4gnjlXX/pbuilderrc_snns --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.V4gnjlXX/b1 --logfile b1/build.log golang-github-ugorji-go-codec_1.2.8-1.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://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.V4gnjlXX/pbuilderrc_5XF9 --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.V4gnjlXX/b2 --logfile b2/build.log golang-github-ugorji-go-codec_1.2.8-1.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://213.165.73.152:3128
 I: uname -a
-  Linux ionos2-i386 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 22 07:43 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/27721/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun 23 14:06 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/64268/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -182,7 +214,7 @@
 Get: 61 http://deb.debian.org/debian unstable/main i386 golang-golang-x-net-dev all 1:0.25.0+dfsg-1 [895 kB]
 Get: 62 http://deb.debian.org/debian unstable/main i386 golang-golang-x-sync-dev all 0.7.0-1 [19.0 kB]
 Get: 63 http://deb.debian.org/debian unstable/main i386 golang-golang-x-tools-dev all 1:0.20.0+ds-1 [1571 kB]
-Fetched 75.8 MB in 2s (50.3 MB/s)
+Fetched 75.8 MB in 1s (69.3 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-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 ... 19703 files and directories currently installed.)
@@ -402,8 +434,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Wed May 22 14:29:33 UTC 2024.
-Universal Time is now:  Wed May 22 14:29:33 UTC 2024.
+Local time is now:      Tue Jun 24 20:54:01 UTC 2025.
+Universal Time is now:  Tue Jun 24 20:54:01 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -461,7 +493,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-ugorji-go-codec-1.2.8/ && 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-ugorji-go-codec_1.2.8-1_source.changes
+I: user script /srv/workspace/pbuilder/64268/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/64268/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-ugorji-go-codec-1.2.8/ && 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-ugorji-go-codec_1.2.8-1_source.changes
 dpkg-buildpackage: info: source package golang-github-ugorji-go-codec
 dpkg-buildpackage: info: source version 1.2.8-1
 dpkg-buildpackage: info: source distribution unstable
@@ -479,84 +515,84 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go install -trimpath -v -p 11 github.com/ugorji/go github.com/ugorji/go/codec github.com/ugorji/go/codec/codecgen
+	cd obj-i686-linux-gnu && go install -trimpath -v -p 21 github.com/ugorji/go github.com/ugorji/go/codec github.com/ugorji/go/codec/codecgen
+unicode/utf8
+internal/itoa
+container/list
 internal/unsafeheader
+unicode/utf16
+internal/cpu
+internal/goos
+encoding
+math/bits
 internal/coverage/rtcov
+internal/nettrace
+cmp
+unicode
+runtime/internal/syscall
+internal/race
 internal/goarch
 internal/godebugs
-internal/goos
-internal/cpu
-internal/race
 internal/goexperiment
+log/internal
 sync/atomic
 runtime/internal/atomic
-runtime/internal/syscall
-unicode
-internal/abi
-internal/chacha8rand
-runtime/internal/math
-runtime/internal/sys
-encoding
-unicode/utf8
-math/bits
-internal/itoa
-cmp
-unicode/utf16
-log/internal
-internal/nettrace
-container/list
 crypto/internal/alias
 crypto/internal/boring/sig
 vendor/golang.org/x/crypto/cryptobyte/asn1
 vendor/golang.org/x/crypto/internal/alias
-internal/gover
-internal/bytealg
 internal/goversion
+internal/gover
 internal/platform
 golang.org/x/tools/internal/packagesinternal
+runtime/internal/math
+internal/chacha8rand
+internal/abi
+runtime/internal/sys
 slices
 math
+internal/bytealg
 runtime
-internal/reflectlite
 crypto/subtle
+internal/reflectlite
 sync
-internal/testlog
-internal/bisect
 internal/singleflight
+internal/bisect
+internal/testlog
 runtime/cgo
 errors
 sort
 internal/godebug
-internal/safefilepath
 internal/oserror
-path
+internal/safefilepath
 io
-vendor/golang.org/x/net/dns/dnsmessage
+path
 strconv
+vendor/golang.org/x/net/dns/dnsmessage
 crypto/internal/nistec/fiat
 syscall
 internal/intern
 math/rand
-bytes
 internal/saferio
-strings
 hash
-hash/crc32
+bytes
 crypto/internal/randutil
+strings
 container/heap
 golang.org/x/mod/semver
-reflect
-crypto
-net/netip
+hash/crc32
 crypto/rc4
+net/netip
+crypto
 internal/types/errors
+reflect
 vendor/golang.org/x/text/transform
-bufio
-html
-regexp/syntax
 net/http/internal/ascii
-go/build/constraint
 go/version
+go/build/constraint
+html
+bufio
+regexp/syntax
 internal/syscall/execenv
 internal/syscall/unix
 time
@@ -569,23 +605,23 @@
 encoding/binary
 os
 encoding/base64
-crypto/cipher
-crypto/md5
 crypto/internal/edwards25519/field
+crypto/md5
 vendor/golang.org/x/crypto/internal/poly1305
+crypto/cipher
 encoding/pem
 crypto/internal/edwards25519
 crypto/internal/boring
-vendor/golang.org/x/crypto/chacha20
 crypto/des
+vendor/golang.org/x/crypto/chacha20
 crypto/hmac
-crypto/sha512
-crypto/aes
 crypto/sha1
-crypto/sha256
 crypto/ecdh
-vendor/golang.org/x/crypto/chacha20poly1305
+crypto/sha512
+crypto/sha256
+crypto/aes
 vendor/golang.org/x/crypto/hkdf
+vendor/golang.org/x/crypto/chacha20poly1305
 internal/lazyregexp
 path/filepath
 fmt
@@ -594,60 +630,60 @@
 internal/goroot
 go/token
 log
-net/url
 text/template/parse
-encoding/json
+net/url
 encoding/hex
+mime/quotedprintable
+golang.org/x/sync/errgroup
+golang.org/x/tools/internal/event/label
+mime
+encoding/json
+vendor/golang.org/x/net/http2/hpack
 compress/flate
 encoding/gob
-vendor/golang.org/x/text/unicode/norm
-math/big
-vendor/golang.org/x/net/http2/hpack
-vendor/golang.org/x/text/unicode/bidi
-mime
-mime/quotedprintable
-net/http/internal
-flag
-compress/gzip
-go/scanner
-vendor/golang.org/x/text/secure/bidirule
 internal/buildcfg
-golang.org/x/sync/errgroup
+flag
+net/http/internal
 go/doc/comment
+math/big
+vendor/golang.org/x/text/unicode/norm
 golang.org/x/tools/internal/stdlib
-text/template
-golang.org/x/tools/internal/tokeninternal
-go/ast
-golang.org/x/tools/internal/event/label
 runtime/debug
 golang.org/x/tools/internal/event/keys
-vendor/golang.org/x/net/idna
-golang.org/x/tools/internal/event/tag
+vendor/golang.org/x/text/unicode/bidi
+go/scanner
+golang.org/x/tools/internal/tokeninternal
 golang.org/x/tools/internal/event/core
+golang.org/x/tools/internal/event/tag
+go/ast
 golang.org/x/tools/internal/event
+compress/gzip
 golang.org/x/tools/internal/gocommand
+vendor/golang.org/x/text/secure/bidirule
+text/template
+golang.org/x/tools/go/internal/packagesdriver
+vendor/golang.org/x/net/idna
+go/internal/typeparams
+go/doc
+go/parser
 crypto/rand
 crypto/internal/bigmod
-crypto/elliptic
 crypto/internal/boring/bbig
+crypto/elliptic
 crypto/dsa
+go/constant
 encoding/asn1
-go/internal/typeparams
-go/parser
 crypto/ed25519
-go/constant
 html/template
-go/doc
-golang.org/x/tools/go/internal/packagesdriver
 crypto/rsa
+golang.org/x/tools/internal/pkgbits
 crypto/x509/pkix
 vendor/golang.org/x/crypto/cryptobyte
-golang.org/x/tools/internal/pkgbits
-crypto/ecdsa
 go/build
 go/types
-net/textproto
+crypto/ecdsa
 vendor/golang.org/x/net/http/httpproxy
+net/textproto
 crypto/x509
 vendor/golang.org/x/net/http/httpguts
 mime/multipart
@@ -666,7 +702,7 @@
 github.com/ugorji/go/codec
 github.com/ugorji/go
    dh_auto_test -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go test -vet=off -v -p 11 github.com/ugorji/go github.com/ugorji/go/codec github.com/ugorji/go/codec/codecgen
+	cd obj-i686-linux-gnu && go test -vet=off -v -p 21 github.com/ugorji/go github.com/ugorji/go/codec github.com/ugorji/go/codec/codecgen
 ?   	github.com/ugorji/go	[no test files]
 ?   	github.com/ugorji/go/codec/codecgen	[no test files]
 === RUN   TestCborIndefiniteLength
@@ -824,13 +860,13 @@
     codec_test.go:2366: skipping as json doesn't support prefixed lengths
 --- SKIP: TestJsonLargeContainerLen (0.00s)
 === RUN   TestCborLargeContainerLen
---- PASS: TestCborLargeContainerLen (0.08s)
+--- PASS: TestCborLargeContainerLen (0.06s)
 === RUN   TestMsgpackLargeContainerLen
---- PASS: TestMsgpackLargeContainerLen (0.08s)
+--- PASS: TestMsgpackLargeContainerLen (0.06s)
 === RUN   TestBincLargeContainerLen
---- PASS: TestBincLargeContainerLen (0.08s)
+--- PASS: TestBincLargeContainerLen (0.07s)
 === RUN   TestSimpleLargeContainerLen
---- PASS: TestSimpleLargeContainerLen (0.07s)
+--- PASS: TestSimpleLargeContainerLen (0.06s)
 === RUN   TestJsonTime
 --- PASS: TestJsonTime (0.00s)
 === RUN   TestCborTime
@@ -936,7 +972,7 @@
 === RUN   TestCborStrucEncDec
 --- PASS: TestCborStrucEncDec (0.00s)
 === RUN   TestMsgpackStrucEncDec
---- PASS: TestMsgpackStrucEncDec (0.01s)
+--- PASS: TestMsgpackStrucEncDec (0.00s)
 === RUN   TestBincStrucEncDec
 --- PASS: TestBincStrucEncDec (0.00s)
 === RUN   TestSimpleStrucEncDec
@@ -1037,27 +1073,27 @@
 === RUN   TestMsgpackDecodeMapAndExtSizeMismatch
 --- PASS: TestMsgpackDecodeMapAndExtSizeMismatch (0.00s)
 === RUN   TestJsonMammoth
---- PASS: TestJsonMammoth (0.02s)
+--- PASS: TestJsonMammoth (0.01s)
 === RUN   TestCborMammoth
 --- PASS: TestCborMammoth (0.01s)
 === RUN   TestMsgpackMammoth
---- PASS: TestMsgpackMammoth (0.02s)
+--- PASS: TestMsgpackMammoth (0.01s)
 === RUN   TestBincMammoth
---- PASS: TestBincMammoth (0.03s)
+--- PASS: TestBincMammoth (0.01s)
 === RUN   TestSimpleMammoth
 --- PASS: TestSimpleMammoth (0.01s)
 === RUN   TestJsonMammothMapsAndSlices
---- PASS: TestJsonMammothMapsAndSlices (0.01s)
+--- PASS: TestJsonMammothMapsAndSlices (0.00s)
 === RUN   TestCborMammothMapsAndSlices
 --- PASS: TestCborMammothMapsAndSlices (0.00s)
 === RUN   TestMsgpackMammothMapsAndSlices
---- PASS: TestMsgpackMammothMapsAndSlices (0.01s)
+--- PASS: TestMsgpackMammothMapsAndSlices (0.00s)
 === RUN   TestBincMammothMapsAndSlices
 --- PASS: TestBincMammothMapsAndSlices (0.00s)
 === RUN   TestSimpleMammothMapsAndSlices
 --- PASS: TestSimpleMammothMapsAndSlices (0.00s)
 PASS
-ok  	github.com/ugorji/go/codec	0.559s
+ok  	github.com/ugorji/go/codec	0.401s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -1094,12 +1130,14 @@
 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/64268/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/64268/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/27721 and its subdirectories
-I: Current time: Wed May 22 02:30:32 -12 2024
-I: pbuilder-time-stamp: 1716388232
+I: removing directory /srv/workspace/pbuilder/64268 and its subdirectories
+I: Current time: Wed Jun 25 10:54:40 +14 2025
+I: pbuilder-time-stamp: 1750798480