Diff of the two buildlogs:

--
--- b1/build.log	2024-05-16 05:24:36.911612317 +0000
+++ b2/build.log	2024-05-16 05:25:25.765535178 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jun 17 23:46:44 -12 2025
-I: pbuilder-time-stamp: 1750247204
+I: Current time: Thu May 16 19:24:40 +14 2024
+I: pbuilder-time-stamp: 1715837080
 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-nats-io-go-nats_1.30.2-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/889460/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3927579/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink02-arm64.
+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 May 16 05:24 /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/3927579/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3927579/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='7a0471fc48f9494b9634173d8d2dbfae'
-  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='889460'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=4dff1c69927445a38ee4a36da7c19c60
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=3927579
   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.yGKsvdEA/pbuilderrc_zvpr --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.yGKsvdEA/b1 --logfile b1/build.log golang-github-nats-io-go-nats_1.30.2-1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.yGKsvdEA/pbuilderrc_ba0x --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.yGKsvdEA/b2 --logfile b2/build.log golang-github-nats-io-go-nats_1.30.2-1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink03-arm64 6.1.0-21-cloud-arm64 #1 SMP Debian 6.1.90-1 (2024-05-03) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-cloud-arm64 #1 SMP Debian 6.1.90-1 (2024-05-03) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun 15 17:48 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/889460/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 15 11:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3927579/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -176,7 +208,7 @@
 Get: 52 http://deb.debian.org/debian trixie/main arm64 protobuf-compiler arm64 3.21.12-8.2 [84.5 kB]
 Get: 53 http://deb.debian.org/debian trixie/main arm64 protoc-gen-go-1-3 arm64 1.3.5-4+b6 [1102 kB]
 Get: 54 http://deb.debian.org/debian trixie/main arm64 golang-goprotobuf-dev arm64 1.3.5-4+b6 [3432 B]
-Fetched 104 MB in 6s (18.6 MB/s)
+Fetched 104 MB in 0s (266 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%
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(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 ... 19744 files and directories currently installed.)
@@ -407,7 +439,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-nats-io-go-nats-1.30.2/ && 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-nats-io-go-nats_1.30.2-1_source.changes
+I: user script /srv/workspace/pbuilder/3927579/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3927579/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-nats-io-go-nats-1.30.2/ && 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-nats-io-go-nats_1.30.2-1_source.changes
 dpkg-buildpackage: info: source package golang-github-nats-io-go-nats
 dpkg-buildpackage: info: source version 1.30.2-1
 dpkg-buildpackage: info: source distribution unstable
@@ -429,42 +465,42 @@
 dh_auto_build: warning: github.com/nats-io/nats.go/micro/test contains no non-test Go files, removing it from build
 dh_auto_build: warning: github.com/nats-io/nats.go/test contains no non-test Go files, removing it from build
 	cd obj-aarch64-linux-gnu && go install -trimpath -v -p 12 github.com/nats-io/nats.go github.com/nats-io/nats.go/bench github.com/nats-io/nats.go/encoders/builtin github.com/nats-io/nats.go/encoders/protobuf github.com/nats-io/nats.go/internal/parser github.com/nats-io/nats.go/jetstream github.com/nats-io/nats.go/micro github.com/nats-io/nats.go/util
-unicode/utf8
+internal/coverage/rtcov
+internal/unsafeheader
 internal/godebugs
+internal/race
 internal/goos
-internal/unsafeheader
-unicode
 internal/goexperiment
-internal/coverage/rtcov
-internal/goarch
-internal/race
+unicode/utf8
+runtime/internal/syscall
+internal/itoa
 internal/cpu
 sync/atomic
-internal/itoa
-runtime/internal/syscall
+internal/goarch
 math/bits
 crypto/internal/alias
-internal/abi
-runtime/internal/math
-runtime/internal/sys
 crypto/subtle
-internal/chacha8rand
 crypto/internal/boring/sig
+unicode
 cmp
 container/list
+internal/abi
+internal/chacha8rand
+runtime/internal/math
+runtime/internal/sys
+slices
+math
 unicode/utf16
 vendor/golang.org/x/crypto/cryptobyte/asn1
 internal/nettrace
-math
-slices
 vendor/golang.org/x/crypto/internal/alias
-internal/bytealg
 encoding
+internal/bytealg
 runtime/internal/atomic
 golang.org/x/crypto/internal/alias
 golang.org/x/crypto/salsa20/salsa
-log/internal
 google.golang.org/protobuf/internal/flags
+log/internal
 runtime
 internal/reflectlite
 sync
@@ -473,130 +509,130 @@
 google.golang.org/protobuf/internal/pragma
 internal/singleflight
 runtime/cgo
+internal/godebug
 errors
 sort
 io
-internal/oserror
+hash
+vendor/golang.org/x/net/dns/dnsmessage
 strconv
-internal/godebug
-internal/safefilepath
+internal/intern
 path
+internal/safefilepath
 bytes
-vendor/golang.org/x/net/dns/dnsmessage
+internal/oserror
 crypto/internal/nistec/fiat
-syscall
 math/rand
-hash
 strings
+syscall
 crypto/internal/randutil
-internal/intern
-reflect
-crypto/rc4
 internal/saferio
-encoding/base32
-crypto
-net/netip
+golang.org/x/text/internal/tag
 hash/crc32
-vendor/golang.org/x/text/transform
 hash/fnv
-golang.org/x/text/internal/tag
+vendor/golang.org/x/text/transform
 golang.org/x/text/transform
+crypto
 bufio
+reflect
+net/netip
+crypto/rc4
+encoding/base32
 regexp/syntax
 net/http/internal/ascii
-internal/syscall/unix
+regexp
 time
+internal/syscall/unix
 internal/syscall/execenv
-regexp
+encoding/binary
+internal/fmtsort
 context
 io/fs
 internal/poll
 embed
-encoding/binary
-internal/fmtsort
-os
+crypto/cipher
+crypto/internal/edwards25519/field
 crypto/md5
+encoding/base64
 vendor/golang.org/x/crypto/internal/poly1305
+golang.org/x/crypto/blake2b
 golang.org/x/crypto/internal/poly1305
 crypto/internal/nistec
-golang.org/x/crypto/blake2b
-crypto/internal/edwards25519/field
-encoding/base64
-crypto/cipher
+os
 golang.org/x/crypto/nacl/secretbox
-encoding/pem
 crypto/internal/boring
-crypto/des
 vendor/golang.org/x/crypto/chacha20
+encoding/pem
+crypto/des
+crypto/internal/edwards25519
 crypto/sha1
 crypto/sha256
-crypto/aes
 crypto/sha512
 crypto/hmac
-crypto/internal/edwards25519
+crypto/aes
 vendor/golang.org/x/crypto/hkdf
 vendor/golang.org/x/crypto/chacha20poly1305
 crypto/ecdh
-google.golang.org/protobuf/internal/detrand
 fmt
 path/filepath
-golang.org/x/crypto/curve25519
+google.golang.org/protobuf/internal/detrand
 net
+golang.org/x/crypto/curve25519
 encoding/hex
-net/url
-encoding/json
-log
-vendor/golang.org/x/net/http2/hpack
 math/big
+encoding/json
 compress/flate
-encoding/gob
+github.com/nats-io/nats.go/internal/parser
+net/url
 mime
+vendor/golang.org/x/net/http2/hpack
 vendor/golang.org/x/text/unicode/norm
-github.com/nats-io/nats.go/internal/parser
+encoding/gob
+log
 mime/quotedprintable
 net/http/internal
-vendor/golang.org/x/text/unicode/bidi
 encoding/csv
+vendor/golang.org/x/text/unicode/bidi
 google.golang.org/protobuf/internal/errors
 go/token
-golang.org/x/text/internal/language
-golang.org/x/text/unicode/norm
+google.golang.org/protobuf/encoding/protowire
 github.com/klauspost/compress/flate
 compress/gzip
-google.golang.org/protobuf/encoding/protowire
+golang.org/x/text/internal/language
+golang.org/x/text/unicode/norm
 google.golang.org/protobuf/reflect/protoreflect
 vendor/golang.org/x/text/secure/bidirule
 vendor/golang.org/x/net/idna
-golang.org/x/text/internal/language/compact
 google.golang.org/protobuf/internal/encoding/messageset
+google.golang.org/protobuf/internal/strs
 google.golang.org/protobuf/internal/genid
 google.golang.org/protobuf/internal/order
-google.golang.org/protobuf/internal/strs
 google.golang.org/protobuf/runtime/protoiface
-golang.org/x/text/language
-github.com/nats-io/nats.go/encoders/builtin
 google.golang.org/protobuf/reflect/protoregistry
-google.golang.org/protobuf/proto
+golang.org/x/text/internal/language/compact
+github.com/nats-io/nats.go/encoders/builtin
+golang.org/x/text/language
 crypto/rand
-crypto/dsa
 crypto/elliptic
-encoding/asn1
-crypto/internal/boring/bbig
 crypto/internal/bigmod
-golang.org/x/text/internal
+crypto/internal/boring/bbig
+encoding/asn1
+crypto/dsa
+google.golang.org/protobuf/proto
 crypto/ed25519
 golang.org/x/crypto/nacl/box
 github.com/nats-io/nuid
-golang.org/x/text/cases
+crypto/rsa
 golang.org/x/crypto/ed25519
+golang.org/x/text/internal
 github.com/nats-io/nkeys
-crypto/rsa
 vendor/golang.org/x/crypto/cryptobyte
 crypto/x509/pkix
+golang.org/x/text/cases
 crypto/ecdsa
 vendor/golang.org/x/net/http/httpproxy
-net/textproto
 crypto/x509
+net/textproto
 vendor/golang.org/x/net/http/httpguts
 mime/multipart
 crypto/tls
@@ -604,10 +640,10 @@
 net/http/httptrace
 net/http
 github.com/nats-io/nats.go
-github.com/nats-io/nats.go/encoders/protobuf
 github.com/nats-io/nats.go/bench
-github.com/nats-io/nats.go/jetstream
+github.com/nats-io/nats.go/encoders/protobuf
 github.com/nats-io/nats.go/micro
+github.com/nats-io/nats.go/jetstream
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -634,12 +670,14 @@
 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/3927579/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3927579/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/889460 and its subdirectories
-I: Current time: Tue Jun 17 23:47:35 -12 2025
-I: pbuilder-time-stamp: 1750247255
+I: removing directory /srv/workspace/pbuilder/3927579 and its subdirectories
+I: Current time: Thu May 16 19:25:24 +14 2024
+I: pbuilder-time-stamp: 1715837124