Diff of the two buildlogs:

--
--- b1/build.log	2024-10-06 06:58:04.470632592 +0000
+++ b2/build.log	2024-10-06 07:00:14.089115852 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Oct  5 18:56:40 -12 2024
-I: pbuilder-time-stamp: 1728197800
+I: Current time: Sun Oct  6 20:58:14 +14 2024
+I: pbuilder-time-stamp: 1728197894
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking golang-starlark_0.0~git20240725.42030a7-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/4655/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2447/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64a.
+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 Oct  6 06:58 /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/2447/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2447/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]="32" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.32(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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='3184e56c884e4221b40ef72ca80611f8'
-  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='4655'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=6eaa315fdcea4965a8293696dbdf36df
+  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=2447
   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.bEB1rVgh/pbuilderrc_h3k1 --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.bEB1rVgh/b1 --logfile b1/build.log golang-starlark_0.0~git20240725.42030a7-1.dsc'
-  SUDO_GID='110'
-  SUDO_UID='103'
-  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.bEB1rVgh/pbuilderrc_aEnQ --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.bEB1rVgh/b2 --logfile b2/build.log golang-starlark_0.0~git20240725.42030a7-1.dsc'
+  SUDO_GID=114
+  SUDO_UID=108
+  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 virt32z 6.1.0-26-armmp-lpae #1 SMP Debian 6.1.112-1 (2024-09-30) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-26-arm64 #1 SMP Debian 6.1.112-1 (2024-09-30) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/4655/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/2447/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -161,7 +193,7 @@
 Get: 39 http://deb.debian.org/debian trixie/main armhf golang-google-protobuf-dev all 1.33.0-1 [625 kB]
 Get: 40 http://deb.debian.org/debian trixie/main armhf tzdata-legacy all 2024a-4 [170 kB]
 Get: 41 http://deb.debian.org/debian trixie/main armhf golang-github-chzyer-readline-dev all 1.4.39.g2972be2-3 [30.8 kB]
-Fetched 63.5 MB in 1s (89.7 MB/s)
+Fetched 63.5 MB in 1s (54.8 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 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 ... 19508 files and directories currently installed.)
@@ -303,8 +335,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Oct  6 06:57:17 UTC 2024.
-Universal Time is now:  Sun Oct  6 06:57:17 UTC 2024.
+Local time is now:      Sun Oct  6 06:58:54 UTC 2024.
+Universal Time is now:  Sun Oct  6 06:58:54 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -346,7 +378,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-starlark-0.0~git20240725.42030a7/ && 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-starlark_0.0~git20240725.42030a7-1_source.changes
+I: user script /srv/workspace/pbuilder/2447/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/2447/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-starlark-0.0~git20240725.42030a7/ && 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-starlark_0.0~git20240725.42030a7-1_source.changes
 dpkg-buildpackage: info: source package golang-starlark
 dpkg-buildpackage: info: source version 0.0~git20240725.42030a7-1
 dpkg-buildpackage: info: source distribution unstable
@@ -364,52 +400,54 @@
    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 go.starlark.net/internal/chunkedfile go.starlark.net/internal/compile go.starlark.net/internal/spell go.starlark.net/lib/json go.starlark.net/lib/math go.starlark.net/lib/proto go.starlark.net/lib/time go.starlark.net/repl go.starlark.net/resolve go.starlark.net/starlark go.starlark.net/starlarkjson go.starlark.net/starlarkstruct go.starlark.net/starlarktest go.starlark.net/syntax
-internal/unsafeheader
+	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 4 go.starlark.net/internal/chunkedfile go.starlark.net/internal/compile go.starlark.net/internal/spell go.starlark.net/lib/json go.starlark.net/lib/math go.starlark.net/lib/proto go.starlark.net/lib/time go.starlark.net/repl go.starlark.net/resolve go.starlark.net/starlark go.starlark.net/starlarkjson go.starlark.net/starlarkstruct go.starlark.net/starlarktest go.starlark.net/syntax
 internal/goarch
-internal/cpu
+internal/unsafeheader
 internal/byteorder
-internal/abi
-internal/chacha8rand
-internal/bytealg
+internal/cpu
 internal/coverage/rtcov
+internal/abi
 internal/godebugs
+internal/chacha8rand
 internal/goexperiment
+internal/bytealg
 internal/goos
 internal/profilerecord
 internal/runtime/atomic
 internal/runtime/syscall
 internal/stringslite
 runtime/internal/math
-internal/runtime/exithook
 runtime/internal/sys
 cmp
 internal/itoa
 internal/race
 math/bits
 unicode/utf8
+internal/runtime/exithook
 sync/atomic
-runtime
-math
 unicode
+math
 internal/asan
 internal/msan
 log/internal
 encoding
 unicode/utf16
+runtime
 hash/maphash
 google.golang.org/protobuf/internal/flags
 google.golang.org/protobuf/internal/set
 container/list
 internal/nettrace
 iter
+internal/weak
 internal/reflectlite
 sync
 slices
-internal/weak
-internal/testlog
-internal/bisect
 google.golang.org/protobuf/internal/pragma
+internal/bisect
+internal/testlog
+internal/singleflight
+runtime/cgo
 errors
 sort
 strconv
@@ -418,86 +456,84 @@
 path
 internal/godebug
 syscall
-bytes
 reflect
+bytes
 strings
 regexp/syntax
 time
 internal/syscall/unix
 internal/syscall/execenv
 regexp
-io/fs
-internal/poll
-internal/fmtsort
-internal/filepathlite
-encoding/binary
 go.starlark.net/internal/spell
 math/rand
-os
 bufio
-encoding/base64
+io/fs
+internal/fmtsort
+internal/poll
+encoding/binary
 hash
 hash/crc32
+internal/filepathlite
 hash/fnv
 embed
-context
 google.golang.org/protobuf/internal/editiondefaults
+context
 vendor/golang.org/x/net/dns/dnsmessage
-internal/singleflight
+encoding/base64
+os
 math/rand/v2
-fmt
-path/filepath
-google.golang.org/protobuf/internal/detrand
-io/ioutil
 internal/concurrent
 unique
-runtime/cgo
+net/netip
+google.golang.org/protobuf/internal/detrand
+path/filepath
+fmt
+io/ioutil
+os/signal
+net
 go.starlark.net/internal/chunkedfile
 log
 math/big
 runtime/debug
 encoding/json
 compress/flate
-go.starlark.net/syntax
 compress/gzip
 google.golang.org/protobuf/internal/errors
 google.golang.org/protobuf/encoding/protowire
-go/token
 google.golang.org/protobuf/reflect/protoreflect
-go.starlark.net/resolve
+go/token
+go.starlark.net/syntax
 google.golang.org/protobuf/internal/version
-net/netip
-go.starlark.net/internal/compile
 google.golang.org/protobuf/internal/encoding/messageset
 google.golang.org/protobuf/internal/strs
-google.golang.org/protobuf/internal/encoding/text
-go.starlark.net/starlark
 google.golang.org/protobuf/internal/genid
+google.golang.org/protobuf/internal/encoding/text
 google.golang.org/protobuf/internal/order
 google.golang.org/protobuf/reflect/protoregistry
 google.golang.org/protobuf/runtime/protoiface
+go.starlark.net/resolve
 google.golang.org/protobuf/internal/descfmt
 google.golang.org/protobuf/proto
+go.starlark.net/internal/compile
 google.golang.org/protobuf/internal/descopts
 google.golang.org/protobuf/internal/encoding/defval
-net
 google.golang.org/protobuf/encoding/prototext
 google.golang.org/protobuf/internal/filedesc
+go.starlark.net/starlark
+google.golang.org/protobuf/internal/encoding/tag
+google.golang.org/protobuf/internal/impl
 go.starlark.net/starlarkstruct
 go.starlark.net/lib/json
 go.starlark.net/lib/math
 go.starlark.net/lib/time
-google.golang.org/protobuf/internal/encoding/tag
-os/signal
-google.golang.org/protobuf/internal/impl
 go.starlark.net/starlarkjson
 go.starlark.net/starlarktest
 github.com/chzyer/readline
+go.starlark.net/repl
 google.golang.org/protobuf/internal/filetype
 google.golang.org/protobuf/runtime/protoimpl
 google.golang.org/protobuf/types/dynamicpb
 go.starlark.net/lib/proto
-go.starlark.net/repl
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -524,12 +560,14 @@
 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/2447/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2447/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/4655 and its subdirectories
-I: Current time: Sat Oct  5 18:58:00 -12 2024
-I: pbuilder-time-stamp: 1728197880
+I: removing directory /srv/workspace/pbuilder/2447 and its subdirectories
+I: Current time: Sun Oct  6 21:00:06 +14 2024
+I: pbuilder-time-stamp: 1728198006