Diff of the two buildlogs:

--
--- b1/build.log	2024-11-30 14:57:53.152210200 +0000
+++ b2/build.log	2024-11-30 14:59:53.394744922 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Nov 30 02:55:38 -12 2024
-I: pbuilder-time-stamp: 1732978538
+I: Current time: Sun Dec  1 04:58:01 +14 2024
+I: pbuilder-time-stamp: 1732978681
 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-github-filosottile-b2_0.0~git20170207.b197f7a-1.1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/24462/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/25866/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64c.
+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 Nov 30 14:58 /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/25866/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/25866/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='ac5c922e921e4c628a2b61de1032e519'
-  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='24462'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=4ee5814ccefc465aab540de8f3e482be
+  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=25866
   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.dbqQuNXJ/pbuilderrc_O8gz --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.dbqQuNXJ/b1 --logfile b1/build.log golang-github-filosottile-b2_0.0~git20170207.b197f7a-1.1.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.dbqQuNXJ/pbuilderrc_ZJq6 --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.dbqQuNXJ/b2 --logfile b2/build.log golang-github-filosottile-b2_0.0~git20170207.b197f7a-1.1.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 virt32z 6.1.0-28-armmp-lpae #1 SMP Debian 6.1.119-1 (2024-11-22) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) 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/24462/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/25866/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -145,7 +177,7 @@
 Get: 33 http://deb.debian.org/debian trixie/main armhf golang-src all 2:1.23~2 [5088 B]
 Get: 34 http://deb.debian.org/debian trixie/main armhf golang-go armhf 2:1.23~2 [44.3 kB]
 Get: 35 http://deb.debian.org/debian trixie/main armhf golang-any armhf 2:1.23~2 [5172 B]
-Fetched 61.9 MB in 1s (54.7 MB/s)
+Fetched 61.9 MB in 2s (39.9 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 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 ... 19683 files and directories currently installed.)
@@ -300,7 +332,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-filosottile-b2-0.0~git20170207.b197f7a/ && 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-filosottile-b2_0.0~git20170207.b197f7a-1.1_source.changes
+I: user script /srv/workspace/pbuilder/25866/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/25866/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-filosottile-b2-0.0~git20170207.b197f7a/ && 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-filosottile-b2_0.0~git20170207.b197f7a-1.1_source.changes
 dpkg-buildpackage: info: source package golang-github-filosottile-b2
 dpkg-buildpackage: info: source version 0.0~git20170207.b197f7a-1.1
 dpkg-buildpackage: info: source distribution unstable
@@ -318,86 +354,78 @@
    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/FiloSottile/b2
-internal/unsafeheader
+	cd _build && go install -trimpath -v -p 4 github.com/FiloSottile/b2
+internal/byteorder
 internal/goarch
+internal/unsafeheader
 internal/cpu
-internal/byteorder
+internal/coverage/rtcov
 internal/abi
 internal/chacha8rand
-internal/bytealg
-internal/coverage/rtcov
 internal/godebugs
 internal/goexperiment
+internal/bytealg
 internal/goos
 internal/profilerecord
 internal/runtime/atomic
 internal/runtime/syscall
-internal/stringslite
 runtime/internal/math
 runtime/internal/sys
-internal/runtime/exithook
+internal/stringslite
 internal/race
 sync/atomic
 unicode
-runtime
+internal/runtime/exithook
 unicode/utf8
 math/bits
-math
 crypto/internal/alias
 crypto/internal/boring/sig
 internal/itoa
+math
 cmp
 internal/asan
 internal/msan
 encoding
 unicode/utf16
+runtime
 log/internal
 container/list
 vendor/golang.org/x/crypto/cryptobyte/asn1
 vendor/golang.org/x/crypto/internal/alias
 internal/nettrace
-internal/reflectlite
-sync
 crypto/subtle
+internal/reflectlite
 iter
+sync
 slices
 internal/weak
 maps
-internal/bisect
 internal/testlog
 internal/singleflight
-errors
+internal/bisect
 runtime/cgo
-internal/godebug
+errors
+sort
 io
+internal/oserror
+strconv
 bytes
 hash
-strconv
-crypto/cipher
-internal/oserror
 path
+internal/godebug
+crypto/cipher
 syscall
 crypto
+reflect
 crypto/internal/boring
 crypto/sha1
-reflect
-time
-internal/syscall/unix
-internal/syscall/execenv
 strings
 bufio
-sort
-io/fs
-internal/poll
-encoding/binary
-internal/fmtsort
-internal/filepathlite
 hash/crc32
-encoding/base64
-context
-os
 crypto/internal/randutil
+time
+internal/syscall/unix
+internal/syscall/execenv
 math/rand
 crypto/aes
 crypto/des
@@ -405,31 +433,49 @@
 crypto/internal/nistec/fiat
 crypto/sha512
 crypto/internal/edwards25519
-fmt
-io/ioutil
+io/fs
+encoding/binary
+internal/fmtsort
+internal/poll
+internal/filepathlite
+context
+encoding/base64
 crypto/hmac
 vendor/golang.org/x/crypto/chacha20
 vendor/golang.org/x/crypto/internal/poly1305
-vendor/golang.org/x/crypto/chacha20poly1305
+os
 vendor/golang.org/x/crypto/hkdf
-encoding/hex
-encoding/json
-log
-compress/flate
-compress/gzip
-math/big
-crypto/internal/nistec
-vendor/golang.org/x/sys/cpu
-vendor/golang.org/x/crypto/sha3
+vendor/golang.org/x/crypto/chacha20poly1305
 crypto/md5
 crypto/rc4
-crypto/ecdh
 crypto/sha256
 encoding/pem
 vendor/golang.org/x/net/dns/dnsmessage
 math/rand/v2
+crypto/internal/nistec
 internal/concurrent
 unique
+fmt
+io/ioutil
+vendor/golang.org/x/sys/cpu
+net/netip
+vendor/golang.org/x/crypto/sha3
+crypto/ecdh
+path/filepath
+vendor/golang.org/x/text/transform
+net/http/internal/ascii
+encoding/hex
+log
+encoding/json
+compress/flate
+math/big
+net
+compress/gzip
+net/url
+vendor/golang.org/x/text/unicode/bidi
+vendor/golang.org/x/text/unicode/norm
+vendor/golang.org/x/text/secure/bidirule
+vendor/golang.org/x/net/http2/hpack
 crypto/rand
 crypto/elliptic
 crypto/internal/bigmod
@@ -440,26 +486,16 @@
 crypto/internal/mlkem768
 crypto/rsa
 crypto/dsa
-net/netip
-vendor/golang.org/x/crypto/cryptobyte
-crypto/x509/pkix
-net/url
-crypto/ecdsa
-path/filepath
-net
-vendor/golang.org/x/text/transform
-vendor/golang.org/x/text/unicode/bidi
-vendor/golang.org/x/text/unicode/norm
-vendor/golang.org/x/text/secure/bidirule
-vendor/golang.org/x/net/http2/hpack
 mime
 vendor/golang.org/x/net/idna
+vendor/golang.org/x/crypto/cryptobyte
+crypto/ecdsa
+crypto/x509/pkix
 mime/quotedprintable
 net/http/internal
-net/http/internal/ascii
-crypto/x509
 vendor/golang.org/x/net/http/httpproxy
 net/textproto
+crypto/x509
 vendor/golang.org/x/net/http/httpguts
 mime/multipart
 crypto/tls
@@ -498,12 +534,14 @@
 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/25866/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/25866/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/24462 and its subdirectories
-I: Current time: Sat Nov 30 02:57:49 -12 2024
-I: pbuilder-time-stamp: 1732978669
+I: removing directory /srv/workspace/pbuilder/25866 and its subdirectories
+I: Current time: Sun Dec  1 04:59:49 +14 2024
+I: pbuilder-time-stamp: 1732978789