Diff of the two buildlogs:

--
--- b1/build.log	2025-08-17 19:51:08.820115005 +0000
+++ b2/build.log	2025-08-17 19:52:18.316212853 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Aug 17 07:50:05 -12 2025
-I: pbuilder-time-stamp: 1755460205
+I: Current time: Sun Sep 20 16:14:11 +14 2026
+I: pbuilder-time-stamp: 1789870451
 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 ratt_0.0~git20250812.e11cf12-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2571731/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3329662/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 Sep 20 02:14 /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/3329662/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3329662/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]="37" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.37(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='fd84f497cfb941b08d551f2827c75426'
-  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='2571731'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=e069e555e4ff4046ba0c370b23174454
+  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=3329662
   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.xIfCLzRm/pbuilderrc_8XOq --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.xIfCLzRm/b1 --logfile b1/build.log ratt_0.0~git20250812.e11cf12-1.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.xIfCLzRm/pbuilderrc_zhT1 --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.xIfCLzRm/b2 --logfile b2/build.log ratt_0.0~git20250812.e11cf12-1.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 6.12.41+deb13-cloud-arm64 #1 SMP Debian 6.12.41-1 (2025-08-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.41+deb13-cloud-arm64 #1 SMP Debian 6.12.41-1 (2025-08-12) 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/2571731/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug 10  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3329662/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -175,7 +207,7 @@
 Get: 61 http://deb.debian.org/debian forky/main arm64 golang-pault-go-debian-dev all 0.16.0-1 [47.4 kB]
 Get: 62 http://deb.debian.org/debian forky/main arm64 python3-roman all 5.0-1 [10.6 kB]
 Get: 63 http://deb.debian.org/debian forky/main arm64 python3-docutils all 0.21.2+dfsg-2 [403 kB]
-Fetched 105 MB in 0s (244 MB/s)
+Fetched 105 MB in 0s (212 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libexpat1:arm64.
 (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 ... 20009 files and directories currently installed.)
@@ -396,8 +428,8 @@
 Setting up tzdata (2025b-5) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Aug 17 19:50:24 UTC 2025.
-Universal Time is now:  Sun Aug 17 19:50:24 UTC 2025.
+Local time is now:      Sun Sep 20 02:14:32 UTC 2026.
+Universal Time is now:  Sun Sep 20 02:14:32 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up golang-github-cespare-xxhash-dev (2.3.0-1) ...
@@ -461,7 +493,11 @@
 fakeroot is already the newest version (1.37.1.2-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/ratt-0.0~git20250812.e11cf12/ && 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  > ../ratt_0.0~git20250812.e11cf12-1_source.changes
+I: user script /srv/workspace/pbuilder/3329662/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for forky
+I: user script /srv/workspace/pbuilder/3329662/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/ratt-0.0~git20250812.e11cf12/ && 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  > ../ratt_0.0~git20250812.e11cf12-1_source.changes
 dpkg-buildpackage: info: source package ratt
 dpkg-buildpackage: info: source version 0.0~git20250812.e11cf12-1
 dpkg-buildpackage: info: source distribution unstable
@@ -480,28 +516,28 @@
    dh_auto_configure -O--builddirectory=debian/.build/upstream -O--buildsystem=golang
    dh_auto_build -O--builddirectory=debian/.build/upstream -O--buildsystem=golang
 	cd debian/.build/upstream && go install -trimpath -v -p 12 github.com/debian/ratt
-internal/msan
 internal/asan
-internal/byteorder
-internal/coverage/rtcov
 internal/profilerecord
 internal/godebugs
-internal/goos
-internal/unsafeheader
 internal/goarch
+internal/coverage/rtcov
+internal/byteorder
+internal/msan
+internal/unsafeheader
+internal/goos
+internal/runtime/math
 internal/goexperiment
 internal/cpu
+internal/abi
 internal/runtime/syscall
-sync/atomic
 math/bits
-unicode/utf8
+sync/atomic
 unicode
-encoding
-internal/chacha8rand
-internal/runtime/math
+unicode/utf8
 cmp
-internal/abi
+encoding
 internal/itoa
+internal/chacha8rand
 unicode/utf16
 log/internal
 container/list
@@ -510,13 +546,13 @@
 crypto/internal/boring/sig
 vendor/golang.org/x/crypto/cryptobyte/asn1
 vendor/golang.org/x/crypto/internal/alias
-crypto/internal/fips140/subtle
 internal/nettrace
+crypto/internal/fips140/subtle
 image/color
 math
+internal/bytealg
 internal/runtime/atomic
 internal/runtime/sys
-internal/bytealg
 crypto/internal/fips140deps/cpu
 internal/stringslite
 internal/runtime/exithook
@@ -526,115 +562,116 @@
 runtime
 internal/reflectlite
 iter
-crypto/subtle
 weak
+crypto/subtle
 sync
 maps
 slices
 errors
 sort
 internal/bisect
-internal/testlog
-internal/singleflight
 unique
-path
-runtime/cgo
+internal/singleflight
+internal/testlog
 io
-golang.org/x/crypto/cast5
+runtime/cgo
+internal/oserror
+path
 vendor/golang.org/x/net/dns/dnsmessage
 strconv
-internal/oserror
 math/rand/v2
-pault.ag/go/topsort
 syscall
+golang.org/x/crypto/cast5
+pault.ag/go/topsort
 internal/godebug
+crypto/internal/fips140deps/godebug
+hash
 bytes
-strings
 reflect
 crypto/internal/randutil
-hash
+strings
+math/rand
 net/netip
-crypto/internal/fips140deps/godebug
+crypto
 hash/crc32
+hash/adler32
 golang.org/x/crypto/openpgp/errors
+golang.org/x/crypto/openpgp/s2k
+vendor/golang.org/x/text/transform
 bufio
-math/rand
-crypto
 crypto/internal/impl
-vendor/golang.org/x/text/transform
 net/http/internal/ascii
 crypto/internal/fips140
-hash/adler32
 regexp/syntax
-crypto/internal/fips140/sha256
-crypto/internal/fips140/sha3
+internal/syscall/execenv
+internal/syscall/unix
+time
 crypto/internal/fips140/sha512
+crypto/internal/fips140/sha3
 crypto/tls/internal/fips140tls
-golang.org/x/crypto/openpgp/s2k
+crypto/internal/fips140/sha256
+crypto/sha3
 compress/bzip2
 image
-crypto/sha3
 crypto/internal/fips140/hmac
-internal/syscall/execenv
-internal/syscall/unix
-time
-crypto/internal/fips140hash
 crypto/internal/fips140/check
+crypto/internal/fips140hash
 crypto/internal/fips140/aes
-crypto/internal/fips140/edwards25519/field
 crypto/internal/fips140/nistec/fiat
-crypto/internal/fips140/hkdf
+crypto/internal/fips140/edwards25519/field
 crypto/internal/fips140/bigmod
+crypto/internal/fips140/hkdf
 crypto/internal/fips140/tls12
 crypto/internal/fips140/tls13
-image/internal/imageutil
-crypto/internal/fips140/edwards25519
 regexp
+crypto/internal/fips140/edwards25519
+image/internal/imageutil
 image/jpeg
-internal/poll
 context
 io/fs
+internal/poll
 internal/filepathlite
 crypto/internal/fips140/nistec
-os
 encoding/binary
 internal/fmtsort
+os
 encoding/base64
 vendor/golang.org/x/crypto/internal/poly1305
 encoding/pem
 golang.org/x/crypto/openpgp/armor
 fmt
-io/ioutil
 pault.ag/go/debian/internal
 crypto/internal/sysrand
 path/filepath
+io/ioutil
+net
 crypto/internal/entropy
 crypto/internal/fips140/drbg
-net
-crypto/internal/fips140only
-crypto/internal/fips140/mlkem
-crypto/internal/fips140/aes/gcm
+os/exec
 crypto/internal/fips140/ecdh
+crypto/internal/fips140only
 crypto/internal/fips140/ecdsa
 crypto/internal/fips140/ed25519
+crypto/internal/fips140/aes/gcm
 crypto/internal/fips140/rsa
-os/exec
+crypto/internal/fips140/mlkem
 crypto/md5
 crypto/rc4
 crypto/cipher
+encoding/json
 flag
-log
 encoding/hex
 net/url
-vendor/golang.org/x/text/unicode/norm
 compress/flate
+vendor/golang.org/x/text/unicode/norm
 math/big
-encoding/json
-mime
+log
 vendor/golang.org/x/net/http2/hpack
+mime
+mime/quotedprintable
 crypto/internal/boring
-crypto/aes
 crypto/des
+crypto/aes
 crypto/ecdh
 crypto/sha512
 crypto/hmac
@@ -642,32 +679,31 @@
 crypto/sha1
 crypto/sha256
 vendor/golang.org/x/text/unicode/bidi
-mime/quotedprintable
 net/http/internal
-vendor/golang.org/x/crypto/chacha20poly1305
 compress/gzip
 compress/zlib
+vendor/golang.org/x/crypto/chacha20poly1305
 pault.ag/go/debian/hashio
 vendor/golang.org/x/text/secure/bidirule
 vendor/golang.org/x/net/idna
 pault.ag/go/debian/version
 pault.ag/go/debian/dependency
-crypto/internal/boring/bbig
+crypto/rand
 crypto/elliptic
+crypto/internal/boring/bbig
 encoding/asn1
-crypto/rand
 crypto/dsa
 crypto/ed25519
-crypto/rsa
 crypto/internal/hpke
 golang.org/x/crypto/openpgp/elgamal
+crypto/rsa
 crypto/x509/pkix
 vendor/golang.org/x/crypto/cryptobyte
 crypto/ecdsa
 golang.org/x/crypto/openpgp/packet
 golang.org/x/crypto/openpgp
-net/textproto
 vendor/golang.org/x/net/http/httpproxy
+net/textproto
 crypto/x509
 vendor/golang.org/x/net/http/httpguts
 mime/multipart
@@ -722,12 +758,14 @@
 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/3329662/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3329662/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/2571731 and its subdirectories
-I: Current time: Sun Aug 17 07:51:08 -12 2025
-I: pbuilder-time-stamp: 1755460268
+I: removing directory /srv/workspace/pbuilder/3329662 and its subdirectories
+I: Current time: Sun Sep 20 16:15:17 +14 2026
+I: pbuilder-time-stamp: 1789870517