Diff of the two buildlogs:

--
--- b1/build.log	2024-10-30 05:07:18.040179768 +0000
+++ b2/build.log	2024-10-30 05:10:13.101923653 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Dec  1 23:28:24 -12 2025
-I: pbuilder-time-stamp: 1764674904
+I: Current time: Wed Oct 30 19:07:20 +14 2024
+I: pbuilder-time-stamp: 1730264840
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking golang-github-nats-io-go-nats_1.37.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/295270/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1172342/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos1-amd64.
+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 30 05:07 /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/1172342/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1172342/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='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="x86_64-pc-linux-gnu")
+  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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='12c4e34067ff411fb41f178e8318bcfc'
-  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='295270'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=dd8338efcafb41a8b2e45f7cb4153ec2
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-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=1172342
   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.P6HYJZwS/pbuilderrc_cCQ7 --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.P6HYJZwS/b1 --logfile b1/build.log golang-github-nats-io-go-nats_1.37.0-1.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.P6HYJZwS/pbuilderrc_cJpm --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.P6HYJZwS/b2 --logfile b2/build.log golang-github-nats-io-go-nats_1.37.0-1.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos5-amd64 6.10.11+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.10.11-1~bpo12+1 (2024-10-03) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-26-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.112-1 (2024-09-30) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/295270/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1172342/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -169,7 +201,7 @@
 Get: 44 http://deb.debian.org/debian unstable/main amd64 golang-golang-x-crypto-dev all 1:0.25.0-1 [1682 kB]
 Get: 45 http://deb.debian.org/debian unstable/main amd64 golang-github-nats-io-nkeys-dev all 0.4.7-1 [16.7 kB]
 Get: 46 http://deb.debian.org/debian unstable/main amd64 golang-github-nats-io-nuid-dev all 1.0.1-1 [4452 B]
-Fetched 106 MB in 11s (9562 kB/s)
+Fetched 106 MB in 10s (11.1 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 ... 19969 files and directories currently installed.)
@@ -368,7 +400,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-nats-io-go-nats-1.37.0/ && 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_1.37.0-1_source.changes
+I: user script /srv/workspace/pbuilder/1172342/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1172342/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-1.37.0/ && 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_1.37.0-1_source.changes
 dpkg-buildpackage: info: source package golang-github-nats-io-go-nats
 dpkg-buildpackage: info: source version 1.37.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -389,197 +425,197 @@
 dh_auto_build: warning: github.com/nats-io/nats.go/jetstream/test contains no non-test Go files, removing it from build
 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-x86_64-linux-gnu && go install -trimpath -v -p 42 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/internal/syncx github.com/nats-io/nats.go/jetstream github.com/nats-io/nats.go/micro github.com/nats-io/nats.go/util
-internal/godebugs
-internal/coverage/rtcov
+	cd obj-x86_64-linux-gnu && go install -trimpath -v -p 20 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/internal/syncx github.com/nats-io/nats.go/jetstream github.com/nats-io/nats.go/micro github.com/nats-io/nats.go/util
 internal/byteorder
-internal/goarch
-internal/unsafeheader
-internal/cpu
-internal/race
-internal/nettrace
 unicode/utf8
+internal/msan
+internal/itoa
+crypto/internal/alias
 internal/asan
-unicode/utf16
-internal/profilerecord
-internal/goexperiment
+unicode
+internal/goarch
 math/bits
-encoding
+internal/unsafeheader
+internal/coverage/rtcov
+internal/godebugs
+internal/profilerecord
 sync/atomic
-vendor/golang.org/x/crypto/internal/alias
-container/list
-cmp
-google.golang.org/protobuf/internal/flags
-internal/runtime/syscall
-internal/msan
+internal/race
+internal/goexperiment
+internal/cpu
+crypto/subtle
 internal/goos
-vendor/golang.org/x/crypto/cryptobyte/asn1
+internal/runtime/syscall
 crypto/internal/boring/sig
-crypto/subtle
-golang.org/x/crypto/internal/alias
-unicode
+cmp
+container/list
+unicode/utf16
 internal/runtime/atomic
-internal/itoa
-log/internal
-crypto/internal/alias
-runtime/internal/math
-internal/chacha8rand
+vendor/golang.org/x/crypto/cryptobyte/asn1
+vendor/golang.org/x/crypto/internal/alias
+internal/nettrace
+encoding
+golang.org/x/crypto/internal/alias
 internal/abi
+runtime/internal/math
 runtime/internal/sys
-internal/runtime/exithook
+internal/chacha8rand
+log/internal
+google.golang.org/protobuf/internal/flags
 golang.org/x/crypto/salsa20/salsa
 internal/bytealg
 math
+internal/runtime/exithook
 internal/stringslite
 runtime
 internal/reflectlite
-iter
 internal/weak
+iter
 sync
-maps
 slices
-internal/singleflight
-internal/testlog
+maps
 internal/bisect
+internal/testlog
+internal/singleflight
 google.golang.org/protobuf/internal/pragma
 github.com/nats-io/nats.go/internal/syncx
 runtime/cgo
+internal/godebug
 errors
-internal/oserror
-vendor/golang.org/x/net/dns/dnsmessage
 sort
+math/rand
+internal/oserror
 io
-crypto/internal/edwards25519/field
-path
-internal/godebug
-math/rand/v2
 strconv
+path
+crypto/internal/edwards25519/field
 crypto/internal/nistec/fiat
+bytes
+strings
+vendor/golang.org/x/net/dns/dnsmessage
+math/rand/v2
 syscall
-math/rand
-crypto/internal/edwards25519
-internal/concurrent
 hash
 crypto/internal/randutil
+crypto/internal/edwards25519
 internal/saferio
-bytes
-strings
-unique
-hash/fnv
-hash/crc32
 golang.org/x/text/internal/tag
-vendor/golang.org/x/text/transform
-golang.org/x/text/transform
-crypto/cipher
-crypto
 crypto/rc4
+internal/concurrent
 encoding/base32
-net/netip
 reflect
-bufio
-regexp/syntax
 net/http/internal/ascii
+regexp/syntax
+bufio
+vendor/golang.org/x/text/transform
+golang.org/x/text/transform
+crypto/cipher
+crypto
+hash/crc32
+hash/fnv
+unique
 crypto/md5
 crypto/internal/boring
 crypto/des
+internal/syscall/execenv
+time
+internal/syscall/unix
+net/netip
+regexp
 crypto/sha1
 crypto/sha256
 crypto/hmac
 crypto/sha512
 crypto/aes
 vendor/golang.org/x/crypto/hkdf
-internal/syscall/execenv
-internal/syscall/unix
-time
-regexp
+internal/fmtsort
+encoding/binary
 context
 io/fs
 internal/poll
-embed
 internal/filepathlite
-internal/fmtsort
-encoding/binary
-crypto/internal/nistec
-os
+embed
 vendor/golang.org/x/crypto/chacha20
 vendor/golang.org/x/crypto/internal/poly1305
 encoding/base64
+crypto/internal/nistec
 golang.org/x/crypto/internal/poly1305
+os
+encoding/pem
 golang.org/x/crypto/nacl/secretbox
+fmt
+vendor/golang.org/x/sys/cpu
 crypto/ecdh
-encoding/pem
-golang.org/x/crypto/curve25519
 google.golang.org/protobuf/internal/detrand
 path/filepath
-vendor/golang.org/x/sys/cpu
 golang.org/x/sys/cpu
-fmt
-net
-golang.org/x/crypto/blake2b
+golang.org/x/crypto/curve25519
 vendor/golang.org/x/crypto/sha3
 vendor/golang.org/x/crypto/chacha20poly1305
+golang.org/x/crypto/blake2b
 encoding/hex
 net/url
 encoding/json
 github.com/nats-io/nats.go/internal/parser
+encoding/csv
 log
-net/http/internal
 mime/quotedprintable
-google.golang.org/protobuf/internal/errors
 mime
 vendor/golang.org/x/net/http2/hpack
+math/big
+google.golang.org/protobuf/internal/errors
+vendor/golang.org/x/text/unicode/norm
 go/token
-encoding/gob
+net/http/internal
 compress/flate
-math/big
-encoding/csv
+encoding/gob
 golang.org/x/text/internal/language
-vendor/golang.org/x/text/unicode/norm
-golang.org/x/text/unicode/norm
 google.golang.org/protobuf/encoding/protowire
-google.golang.org/protobuf/reflect/protoreflect
+golang.org/x/text/unicode/norm
 vendor/golang.org/x/text/unicode/bidi
+google.golang.org/protobuf/reflect/protoreflect
 compress/gzip
 github.com/klauspost/compress/flate
+golang.org/x/text/internal/language/compact
+golang.org/x/text/language
+vendor/golang.org/x/text/secure/bidirule
 google.golang.org/protobuf/internal/encoding/messageset
-google.golang.org/protobuf/internal/strs
-google.golang.org/protobuf/runtime/protoiface
 google.golang.org/protobuf/internal/genid
 google.golang.org/protobuf/internal/order
-golang.org/x/text/internal/language/compact
-vendor/golang.org/x/text/secure/bidirule
-google.golang.org/protobuf/reflect/protoregistry
-golang.org/x/text/language
+google.golang.org/protobuf/internal/strs
+google.golang.org/protobuf/runtime/protoiface
 vendor/golang.org/x/net/idna
-google.golang.org/protobuf/proto
+google.golang.org/protobuf/reflect/protoregistry
+github.com/nats-io/nats.go/encoders/builtin
 crypto/rand
-crypto/internal/boring/bbig
 crypto/elliptic
 crypto/internal/bigmod
-encoding/asn1
+crypto/internal/boring/bbig
 crypto/dsa
-github.com/nats-io/nats.go/encoders/builtin
-golang.org/x/text/internal
+encoding/asn1
 crypto/ed25519
 crypto/internal/hpke
 crypto/internal/mlkem768
 golang.org/x/crypto/nacl/box
 github.com/nats-io/nuid
+golang.org/x/text/internal
 golang.org/x/text/cases
-golang.org/x/crypto/ed25519
 crypto/rsa
-github.com/nats-io/nkeys
-vendor/golang.org/x/crypto/cryptobyte
+google.golang.org/protobuf/proto
+golang.org/x/crypto/ed25519
 crypto/x509/pkix
+vendor/golang.org/x/crypto/cryptobyte
+github.com/nats-io/nkeys
 crypto/ecdsa
+net
+crypto/x509
 vendor/golang.org/x/net/http/httpproxy
 net/textproto
-crypto/x509
 vendor/golang.org/x/net/http/httpguts
 mime/multipart
 crypto/tls
-net/http/httptrace
 github.com/nats-io/nats.go/util
+net/http/httptrace
 net/http
 github.com/nats-io/nats.go
 github.com/nats-io/nats.go/bench
@@ -612,12 +648,14 @@
 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/1172342/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1172342/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/295270 and its subdirectories
-I: Current time: Mon Dec  1 23:30:14 -12 2025
-I: pbuilder-time-stamp: 1764675014
+I: removing directory /srv/workspace/pbuilder/1172342 and its subdirectories
+I: Current time: Wed Oct 30 19:10:12 +14 2024
+I: pbuilder-time-stamp: 1730265012