Diff of the two buildlogs:

--
--- b1/build.log	2025-02-12 19:29:22.442995886 +0000
+++ b2/build.log	2025-02-12 19:37:41.208491885 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Feb 12 07:23:09 -12 2025
-I: pbuilder-time-stamp: 1739388189
+I: Current time: Thu Feb 13 09:29:35 +14 2025
+I: pbuilder-time-stamp: 1739388575
 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-docker-go_1.5.2~git20160303.d30aec9-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/21119/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/21813/tmp/hooks/D01_modify_environment starting
+debug: Running on ff64a.
+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 12 19:30 /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/21813/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/21813/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='trixie'
-  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=6 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='a3064b00a637466a8765f35232998716'
-  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='21119'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=34b296b5f69e41eba1e654f67e44f608
+  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=21813
   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.LaERXsr7/pbuilderrc_yBzx --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.LaERXsr7/b1 --logfile b1/build.log golang-github-docker-go_1.5.2~git20160303.d30aec9-1.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.LaERXsr7/pbuilderrc_2dHI --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.LaERXsr7/b2 --logfile b2/build.log golang-github-docker-go_1.5.2~git20160303.d30aec9-1.dsc'
+  SUDO_GID=114
+  SUDO_UID=109
+  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 cbxi4a 6.1.0-23-armmp #1 SMP Debian 6.1.99-1 (2024-07-15) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/21119/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/21813/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -142,7 +174,7 @@
 Get: 33 http://deb.debian.org/debian trixie/main armhf golang-1.23-go armhf 1.23.5-1 [23.6 MB]
 Get: 34 http://deb.debian.org/debian trixie/main armhf golang-src all 2:1.23~2 [5088 B]
 Get: 35 http://deb.debian.org/debian trixie/main armhf golang-go armhf 2:1.23~2 [44.3 kB]
-Fetched 62.6 MB in 3s (18.2 MB/s)
+Fetched 62.6 MB in 2s (28.6 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package sensible-utils.
 (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 ... 19531 files and directories currently installed.)
@@ -302,7 +334,11 @@
 fakeroot is already the newest version (1.37-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-docker-go-1.5.2~git20160303.d30aec9/ && 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-docker-go_1.5.2~git20160303.d30aec9-1_source.changes
+I: user script /srv/workspace/pbuilder/21813/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/21813/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-docker-go-1.5.2~git20160303.d30aec9/ && 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-docker-go_1.5.2~git20160303.d30aec9-1_source.changes
 dpkg-buildpackage: info: source package golang-github-docker-go
 dpkg-buildpackage: info: source version 1.5.2~git20160303.d30aec9-1
 dpkg-buildpackage: info: source distribution unstable
@@ -320,71 +356,71 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 3 github.com/docker/go/canonical/json
+	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 6 github.com/docker/go/canonical/json
 internal/goarch
 internal/unsafeheader
-internal/cpu
 internal/byteorder
-internal/abi
-internal/chacha8rand
-internal/bytealg
 internal/coverage/rtcov
 internal/godebugs
+internal/cpu
+internal/abi
 internal/goexperiment
 internal/goos
 internal/profilerecord
 internal/runtime/syscall
-internal/runtime/atomic
-internal/stringslite
 runtime/internal/math
+internal/chacha8rand
 runtime/internal/sys
 internal/race
-internal/runtime/exithook
 sync/atomic
+internal/bytealg
+internal/runtime/atomic
 unicode
 unicode/utf8
 encoding
+internal/stringslite
 math/bits
-runtime
-math
 internal/itoa
 cmp
+math
+internal/runtime/exithook
 internal/asan
 internal/msan
 unicode/utf16
+runtime
 internal/reflectlite
-iter
 sync
+iter
 slices
 internal/testlog
 internal/bisect
 errors
 sort
+internal/godebug
+internal/oserror
+path
 io
 strconv
+syscall
+strings
 bytes
-internal/oserror
-path
-internal/godebug
 reflect
-strings
-syscall
+internal/syscall/execenv
 internal/syscall/unix
 time
-internal/syscall/execenv
 internal/fmtsort
 encoding/binary
-io/fs
 internal/poll
+io/fs
 internal/filepathlite
-encoding/base64
 os
+encoding/base64
 fmt
 github.com/docker/go/canonical/json
    dh_auto_test -O--buildsystem=golang
-	cd obj-arm-linux-gnueabihf && go test -vet=off -v -p 3 github.com/docker/go/canonical/json
+	cd obj-arm-linux-gnueabihf && go test -vet=off -v -p 6 github.com/docker/go/canonical/json
 === RUN   TestMarshal
---- PASS: TestMarshal (0.00s)
+--- PASS: TestMarshal (0.01s)
 === RUN   TestMarshalBadUTF8
 --- PASS: TestMarshalBadUTF8 (0.00s)
 === RUN   TestMarshalNumberZeroVal
@@ -392,9 +428,9 @@
 === RUN   TestMarshalEmbeds
 --- PASS: TestMarshalEmbeds (0.00s)
 === RUN   TestUnmarshal
---- PASS: TestUnmarshal (0.35s)
+--- PASS: TestUnmarshal (0.77s)
 === RUN   TestUnmarshalMarshal
---- PASS: TestUnmarshalMarshal (2.22s)
+--- PASS: TestUnmarshalMarshal (2.98s)
 === RUN   TestNumberAccessors
 --- PASS: TestNumberAccessors (0.00s)
 === RUN   TestLargeByteSlice
@@ -414,9 +450,9 @@
 === RUN   TestNullString
 --- PASS: TestNullString (0.00s)
 === RUN   TestInterfaceSet
---- PASS: TestInterfaceSet (0.00s)
+--- PASS: TestInterfaceSet (0.01s)
 === RUN   TestUnmarshalNulls
---- PASS: TestUnmarshalNulls (0.01s)
+--- PASS: TestUnmarshalNulls (0.04s)
 === RUN   TestStringKind
 --- PASS: TestStringKind (0.00s)
 === RUN   TestByteKind
@@ -440,7 +476,7 @@
 === RUN   TestInvalidUnmarshalText
 --- PASS: TestInvalidUnmarshalText (0.00s)
 === RUN   TestInvalidStringOption
---- PASS: TestInvalidStringOption (0.00s)
+--- PASS: TestInvalidStringOption (0.01s)
 === RUN   TestOmitEmpty
 --- PASS: TestOmitEmpty (0.00s)
 === RUN   TestStringTag
@@ -462,7 +498,7 @@
 === RUN   TestDuplicatedFieldDisappears
 --- PASS: TestDuplicatedFieldDisappears (0.00s)
 === RUN   TestStringBytes
---- PASS: TestStringBytes (0.75s)
+--- PASS: TestStringBytes (0.71s)
 === RUN   TestIssue6458
 --- PASS: TestIssue6458 (0.00s)
 === RUN   TestIssue10281
@@ -482,7 +518,7 @@
 === RUN   TestFold
 --- PASS: TestFold (0.00s)
 === RUN   TestFoldAgainstUnicode
---- PASS: TestFoldAgainstUnicode (0.00s)
+--- PASS: TestFoldAgainstUnicode (0.01s)
 === RUN   TestCompact
 --- PASS: TestCompact (0.00s)
 === RUN   TestCompactSeparators
@@ -490,13 +526,13 @@
 === RUN   TestIndent
 --- PASS: TestIndent (0.00s)
 === RUN   TestCompactBig
---- PASS: TestCompactBig (1.48s)
+--- PASS: TestCompactBig (1.64s)
 === RUN   TestIndentBig
---- PASS: TestIndentBig (4.25s)
+--- PASS: TestIndentBig (4.96s)
 === RUN   TestIndentErrors
 --- PASS: TestIndentErrors (0.00s)
 === RUN   TestNextValueBig
---- PASS: TestNextValueBig (1.43s)
+--- PASS: TestNextValueBig (1.27s)
 === RUN   TestEncoder
 --- PASS: TestEncoder (0.00s)
 === RUN   TestDecoder
@@ -532,7 +568,7 @@
 === RUN   ExampleIndent
 --- PASS: ExampleIndent (0.00s)
 PASS
-ok  	github.com/docker/go/canonical/json	10.620s
+ok  	github.com/docker/go/canonical/json	12.566s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -560,12 +596,14 @@
 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/21813/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/21813/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/21119 and its subdirectories
-I: Current time: Wed Feb 12 07:29:18 -12 2025
-I: pbuilder-time-stamp: 1739388558
+I: removing directory /srv/workspace/pbuilder/21813 and its subdirectories
+I: Current time: Thu Feb 13 09:37:36 +14 2025
+I: pbuilder-time-stamp: 1739389056