Diff of the two buildlogs:

--
--- b1/build.log	2025-09-11 08:27:57.267277596 +0000
+++ b2/build.log	2025-09-11 08:28:39.127326583 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Sep 10 20:27:20 -12 2025
-I: pbuilder-time-stamp: 1757579240
+I: Current time: Thu Oct 15 04:50:59 +14 2026
+I: pbuilder-time-stamp: 1791989459
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/forky-reproducible-base.tgz]
 I: copying local configuration
@@ -22,53 +22,85 @@
 dpkg-source: info: unpacking golang-github-eggsampler-acme_3.6.1-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/369234/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1046376/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink03-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 Oct 14 14:51 /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/1046376/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1046376/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]="3" [2]="3" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.3.3(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='forky'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=forky
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='5871a66430c84409a717eda0d59dd6ca'
-  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='369234'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=5468d2674a20422e8434d0cb7ecab87a
+  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=1046376
   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.1cCwzxUT/pbuilderrc_J25M --distribution forky --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/forky-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.1cCwzxUT/b1 --logfile b1/build.log golang-github-eggsampler-acme_3.6.1-2.dsc'
-  SUDO_GID='109'
-  SUDO_HOME='/var/lib/jenkins'
-  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.1cCwzxUT/pbuilderrc_COHX --distribution forky --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/forky-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.1cCwzxUT/b2 --logfile b2/build.log golang-github-eggsampler-acme_3.6.1-2.dsc'
+  SUDO_GID=109
+  SUDO_HOME=/var/lib/jenkins
+  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 codethink04-arm64 6.12.43+deb13-cloud-arm64 #1 SMP Debian 6.12.43-1 (2025-08-27) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.43+deb13-cloud-arm64 #1 SMP Debian 6.12.43-1 (2025-08-27) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug 10 12:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/369234/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug 10  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1046376/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: 35 http://deb.debian.org/debian forky/main arm64 golang-src all 2:1.24~2 [5136 B]
 Get: 36 http://deb.debian.org/debian forky/main arm64 golang-go arm64 2:1.24~2 [44.3 kB]
 Get: 37 http://deb.debian.org/debian forky/main arm64 golang-any arm64 2:1.24~2 [5216 B]
-Fetched 58.7 MB in 0s (315 MB/s)
+Fetched 58.7 MB in 0s (170 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 ... 21045 files and directories currently installed.)
@@ -308,7 +340,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-eggsampler-acme-3.6.1/ && 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-eggsampler-acme_3.6.1-2_source.changes
+I: user script /srv/workspace/pbuilder/1046376/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for forky
+I: user script /srv/workspace/pbuilder/1046376/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-eggsampler-acme-3.6.1/ && 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-eggsampler-acme_3.6.1-2_source.changes
 dpkg-buildpackage: info: source package golang-github-eggsampler-acme
 dpkg-buildpackage: info: source version 3.6.1-2
 dpkg-buildpackage: info: source distribution unstable
@@ -327,174 +363,174 @@
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
 	cd obj-aarch64-linux-gnu && go install -trimpath -v -p 12 github.com/eggsampler/acme
+internal/godebugs
+internal/coverage/rtcov
 internal/goos
-internal/unsafeheader
-internal/profilerecord
 internal/asan
+internal/msan
+internal/profilerecord
+internal/unsafeheader
 internal/byteorder
+internal/goarch
 internal/goexperiment
-internal/godebugs
-internal/runtime/syscall
 internal/cpu
-internal/msan
-internal/coverage/rtcov
-internal/goarch
-sync/atomic
 math/bits
-unicode
+internal/runtime/syscall
 unicode/utf8
+unicode
 internal/itoa
-internal/runtime/math
-internal/abi
+sync/atomic
 crypto/internal/fips140/alias
-internal/chacha8rand
-crypto/internal/fips140deps/byteorder
 cmp
 crypto/internal/boring/sig
-crypto/internal/fips140/subtle
+internal/abi
+internal/runtime/math
 unicode/utf16
+crypto/internal/fips140/subtle
 vendor/golang.org/x/crypto/cryptobyte/asn1
 container/list
-internal/bytealg
-internal/runtime/atomic
-internal/runtime/sys
-crypto/internal/fips140deps/cpu
-math
 vendor/golang.org/x/crypto/internal/alias
 internal/nettrace
+internal/chacha8rand
+crypto/internal/fips140deps/byteorder
 encoding
 log/internal
-internal/runtime/exithook
+math
+internal/runtime/atomic
+internal/runtime/sys
+crypto/internal/fips140deps/cpu
+internal/bytealg
 internal/stringslite
+internal/runtime/exithook
 internal/race
 internal/sync
 internal/runtime/maps
 runtime
+iter
 internal/reflectlite
 crypto/subtle
 weak
-iter
 sync
 maps
 slices
 errors
 sort
-internal/bisect
 internal/testlog
-internal/singleflight
 unique
-io
+internal/bisect
+internal/singleflight
 internal/oserror
+io
 path
-runtime/cgo
+vendor/golang.org/x/net/dns/dnsmessage
 math/rand/v2
 strconv
-vendor/golang.org/x/net/dns/dnsmessage
 syscall
-internal/godebug
+runtime/cgo
 bytes
-crypto/internal/fips140deps/godebug
-strings
-hash
-crypto
-net/netip
+internal/godebug
 reflect
+hash
 crypto/internal/randutil
+strings
+crypto/internal/fips140deps/godebug
 math/rand
-hash/crc32
+crypto
+net/netip
 vendor/golang.org/x/text/transform
+hash/crc32
 crypto/internal/impl
-regexp/syntax
-net/http/internal/ascii
 bufio
+net/http/internal/ascii
+regexp/syntax
 crypto/internal/fips140
 crypto/internal/fips140/sha256
-crypto/internal/fips140/sha512
-crypto/internal/fips140/sha3
 crypto/tls/internal/fips140tls
-crypto/sha3
+crypto/internal/fips140/sha3
+crypto/internal/fips140/sha512
+internal/syscall/execenv
 time
 internal/syscall/unix
-internal/syscall/execenv
 crypto/internal/fips140/hmac
+crypto/sha3
 crypto/internal/fips140hash
 crypto/internal/fips140/check
 crypto/internal/fips140/aes
 crypto/internal/fips140/nistec/fiat
 crypto/internal/fips140/edwards25519/field
+crypto/internal/fips140/hkdf
 crypto/internal/fips140/bigmod
 crypto/internal/fips140/tls12
-crypto/internal/fips140/hkdf
 crypto/internal/fips140/tls13
-crypto/internal/fips140/edwards25519
 regexp
+crypto/internal/fips140/edwards25519
 context
 io/fs
 internal/poll
 internal/filepathlite
 crypto/internal/fips140/nistec
 os
-internal/fmtsort
 encoding/binary
+internal/fmtsort
 vendor/golang.org/x/crypto/internal/poly1305
 encoding/base64
-crypto/internal/sysrand
+encoding/pem
 fmt
 io/ioutil
+crypto/internal/sysrand
 path/filepath
 net
-encoding/pem
 crypto/internal/entropy
 crypto/internal/fips140/drbg
-crypto/internal/fips140/aes/gcm
 crypto/internal/fips140only
 crypto/internal/fips140/ecdh
 crypto/internal/fips140/ecdsa
-crypto/internal/fips140/rsa
+crypto/internal/fips140/aes/gcm
 crypto/internal/fips140/ed25519
 crypto/internal/fips140/mlkem
+crypto/internal/fips140/rsa
 crypto/md5
 crypto/rc4
 crypto/cipher
+mime
+math/big
 encoding/hex
-log
-vendor/golang.org/x/net/http2/hpack
-vendor/golang.org/x/text/unicode/norm
 net/url
-math/big
-compress/flate
 encoding/json
-mime
-mime/quotedprintable
+compress/flate
+log
+vendor/golang.org/x/text/unicode/norm
+vendor/golang.org/x/net/http2/hpack
 crypto/internal/boring
 crypto/des
-vendor/golang.org/x/crypto/chacha20
 crypto/ecdh
 crypto/sha512
 crypto/hmac
 crypto/sha1
 crypto/sha256
 crypto/aes
+vendor/golang.org/x/crypto/chacha20
 vendor/golang.org/x/text/unicode/bidi
+mime/quotedprintable
 net/http/internal
-vendor/golang.org/x/crypto/chacha20poly1305
 compress/gzip
+vendor/golang.org/x/crypto/chacha20poly1305
 vendor/golang.org/x/text/secure/bidirule
 vendor/golang.org/x/net/idna
 crypto/internal/boring/bbig
 crypto/elliptic
-crypto/rand
-encoding/asn1
 crypto/dsa
-crypto/ed25519
+encoding/asn1
+crypto/rand
 crypto/internal/hpke
+crypto/ed25519
 crypto/rsa
-vendor/golang.org/x/crypto/cryptobyte
 crypto/x509/pkix
+vendor/golang.org/x/crypto/cryptobyte
 crypto/ecdsa
 net/textproto
-crypto/x509
 vendor/golang.org/x/net/http/httpproxy
+crypto/x509
 vendor/golang.org/x/net/http/httpguts
 mime/multipart
 crypto/tls
@@ -527,12 +563,14 @@
 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/1046376/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1046376/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/369234 and its subdirectories
-I: Current time: Wed Sep 10 20:27:56 -12 2025
-I: pbuilder-time-stamp: 1757579276
+I: removing directory /srv/workspace/pbuilder/1046376 and its subdirectories
+I: Current time: Thu Oct 15 04:51:38 +14 2026
+I: pbuilder-time-stamp: 1791989498