Diff of the two buildlogs:

--
--- b1/build.log	2024-04-29 14:28:47.627582697 +0000
+++ b2/build.log	2024-04-29 14:30:34.859019181 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Apr 29 02:27:44 -12 2024
-I: pbuilder-time-stamp: 1714400864
+I: Current time: Mon Jun  2 10:51:51 +14 2025
+I: pbuilder-time-stamp: 1748811111
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -27,52 +27,84 @@
 dpkg-source: info: applying 0001-update-test-fixture-paths.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/4067884/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1714461/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 Jun  1 20:51 /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/1714461/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1714461/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='f286226658454f57af14d41d530011aa'
-  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='4067884'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=75c6c7b151404064b5abeb4fe416d2c1
+  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=1714461
   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.LEoMMXbU/pbuilderrc_wRsR --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.LEoMMXbU/b1 --logfile b1/build.log golang-github-facebookgo-httpdown_0.0~git20160323.0.a3b1354-8.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.LEoMMXbU/pbuilderrc_yfoK --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.LEoMMXbU/b2 --logfile b2/build.log golang-github-facebookgo-httpdown_0.0~git20160323.0.a3b1354-8.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 codethink04-arm64 6.1.0-20-cloud-arm64 #1 SMP Debian 6.1.85-1 (2024-04-11) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-20-cloud-arm64 #1 SMP Debian 6.1.85-1 (2024-04-11) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 23 11:23 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/4067884/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 24 13:38 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1714461/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -163,7 +195,7 @@
 Get: 41 http://deb.debian.org/debian trixie/main arm64 golang-github-facebookgo-ensure-dev all 0.0~git20160127.0.b4ab57d-6 [7076 B]
 Get: 42 http://deb.debian.org/debian trixie/main arm64 golang-github-facebookgo-freeport-dev all 0.0~git20150612.0.d4adf43-7 [3520 B]
 Get: 43 http://deb.debian.org/debian trixie/main arm64 golang-github-facebookgo-stats-dev all 0.0~git20151006.0.1b76add-7 [6480 B]
-Fetched 59.0 MB in 1s (102 MB/s)
+Fetched 59.0 MB in 1s (108 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
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(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19941 files and directories currently installed.)
@@ -355,7 +387,11 @@
 fakeroot is already the newest version (1.33-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-facebookgo-httpdown-0.0~git20160323.0.a3b1354/ && 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-facebookgo-httpdown_0.0~git20160323.0.a3b1354-8_source.changes
+I: user script /srv/workspace/pbuilder/1714461/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/1714461/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-facebookgo-httpdown-0.0~git20160323.0.a3b1354/ && 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-facebookgo-httpdown_0.0~git20160323.0.a3b1354-8_source.changes
 dpkg-buildpackage: info: source package golang-github-facebookgo-httpdown
 dpkg-buildpackage: info: source version 0.0~git20160323.0.a3b1354-8
 dpkg-buildpackage: info: source distribution unstable
@@ -374,115 +410,115 @@
    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/facebookgo/httpdown
-internal/unsafeheader
-unicode
-internal/race
-internal/goos
 internal/godebugs
-unicode/utf8
 internal/goarch
-container/list
 internal/coverage/rtcov
+internal/goos
+unicode/utf8
 internal/goexperiment
-sync/atomic
+internal/unsafeheader
+container/list
 internal/cpu
-internal/itoa
-internal/abi
 internal/chacha8rand
 runtime/internal/math
+runtime/internal/syscall
+sync/atomic
 runtime/internal/sys
+unicode
+internal/race
+internal/itoa
+internal/abi
 math/bits
 crypto/internal/alias
-runtime/internal/syscall
 crypto/subtle
 crypto/internal/boring/sig
 cmp
 unicode/utf16
 vendor/golang.org/x/crypto/cryptobyte/asn1
 math
-slices
 internal/nettrace
 vendor/golang.org/x/crypto/internal/alias
 log/internal
+slices
 internal/bytealg
 runtime/internal/atomic
 runtime
 internal/reflectlite
 sync
 internal/testlog
-internal/singleflight
 internal/bisect
+internal/singleflight
 runtime/cgo
+internal/godebug
 errors
 sort
-internal/godebug
-internal/oserror
 io
 crypto/internal/nistec/fiat
-path
+internal/oserror
 internal/safefilepath
+vendor/golang.org/x/net/dns/dnsmessage
+math/rand
+internal/intern
+path
 strconv
 bytes
-syscall
-math/rand
 hash
-internal/intern
-vendor/golang.org/x/net/dns/dnsmessage
-crypto/internal/randutil
-strings
-reflect
-hash/crc32
+syscall
 crypto
+reflect
 crypto/rc4
 net/netip
+hash/crc32
+crypto/internal/randutil
+strings
 vendor/golang.org/x/text/transform
 bufio
 net/http/internal/ascii
 time
 internal/syscall/unix
 internal/syscall/execenv
-encoding/binary
-internal/fmtsort
 context
-internal/poll
 io/fs
+internal/poll
 github.com/facebookgo/clock
+encoding/binary
+internal/fmtsort
 embed
 crypto/cipher
-vendor/golang.org/x/crypto/internal/poly1305
 crypto/internal/edwards25519/field
-crypto/md5
-encoding/base64
 crypto/internal/nistec
 os
+crypto/md5
+encoding/base64
+vendor/golang.org/x/crypto/internal/poly1305
 crypto/internal/boring
 crypto/des
 vendor/golang.org/x/crypto/chacha20
 encoding/pem
-crypto/internal/edwards25519
 crypto/aes
 crypto/sha512
-crypto/sha1
 crypto/hmac
+crypto/internal/edwards25519
+crypto/sha1
 crypto/sha256
 vendor/golang.org/x/crypto/hkdf
 vendor/golang.org/x/crypto/chacha20poly1305
 crypto/ecdh
-os/signal
-path/filepath
 fmt
+path/filepath
+os/signal
 net
+math/big
+encoding/hex
 net/url
 github.com/facebookgo/stats
-mime/quotedprintable
-net/http/internal
 compress/flate
 log
-math/big
+vendor/golang.org/x/text/unicode/norm
 vendor/golang.org/x/net/http2/hpack
 mime
-encoding/hex
-vendor/golang.org/x/text/unicode/norm
+mime/quotedprintable
+net/http/internal
 vendor/golang.org/x/text/unicode/bidi
 compress/gzip
 vendor/golang.org/x/text/secure/bidirule
@@ -495,8 +531,8 @@
 crypto/internal/boring/bbig
 crypto/ed25519
 crypto/rsa
-crypto/x509/pkix
 vendor/golang.org/x/crypto/cryptobyte
+crypto/x509/pkix
 crypto/ecdsa
 crypto/x509
 net/textproto
@@ -540,37 +576,37 @@
 === RUN   TestTLS
 === PAUSE TestTLS
 === CONT  TestHTTPStopWithNoRequest
-=== CONT  TestHTTPKillTimeout
+=== CONT  TestTLS
+=== CONT  TestHTTPSDefaultListenError
+--- PASS: TestHTTPSDefaultListenError (0.00s)
+=== CONT  TestHTTPDefaultListenError
+--- PASS: TestHTTPDefaultListenError (0.00s)
 === CONT  TestExistingConnState
 === CONT  TestDoubleStop
 === CONT  TestHTTPKillTimeoutMissed
-=== CONT  TestHTTPListenerCloseError
+=== CONT  TestHTTPKillTimeout
 === CONT  TestHTTPStopTimeoutMissed
 === CONT  TestHTTPWithinStopTimeout
 === CONT  TestHTTPServeError
-=== CONT  TestTLS
-=== CONT  TestHTTPStopWithActiveRequest
+=== CONT  TestHTTPListenerCloseError
 === CONT  TestNewRequestAfterStop
+=== CONT  TestHTTPStopWithActiveRequest
 --- PASS: TestHTTPStopWithNoRequest (0.00s)
-=== CONT  TestHTTPSDefaultListenError
---- PASS: TestDoubleStop (0.00s)
+--- PASS: TestDoubleStop (0.01s)
+--- PASS: TestHTTPServeError (0.02s)
+--- PASS: TestHTTPListenerCloseError (0.02s)
 === CONT  TestHTTPStopWithFinishedRequest
---- PASS: TestHTTPListenerCloseError (0.00s)
-=== CONT  TestHTTPDefaultListenError
---- PASS: TestHTTPServeError (0.00s)
---- PASS: TestHTTPSDefaultListenError (0.00s)
---- PASS: TestHTTPDefaultListenError (0.00s)
---- PASS: TestHTTPStopWithFinishedRequest (0.00s)
---- PASS: TestHTTPWithinStopTimeout (0.01s)
---- PASS: TestExistingConnState (0.01s)
---- PASS: TestHTTPStopTimeoutMissed (0.01s)
---- PASS: TestHTTPKillTimeout (0.01s)
---- PASS: TestNewRequestAfterStop (0.01s)
---- PASS: TestHTTPStopWithActiveRequest (0.01s)
---- PASS: TestHTTPKillTimeoutMissed (0.01s)
---- PASS: TestTLS (0.02s)
+--- PASS: TestExistingConnState (0.02s)
+--- PASS: TestHTTPWithinStopTimeout (0.03s)
+--- PASS: TestHTTPStopWithFinishedRequest (0.02s)
+--- PASS: TestHTTPKillTimeout (0.05s)
+--- PASS: TestHTTPStopTimeoutMissed (0.05s)
+--- PASS: TestNewRequestAfterStop (0.08s)
+--- PASS: TestTLS (0.08s)
+--- PASS: TestHTTPKillTimeoutMissed (0.09s)
+--- PASS: TestHTTPStopWithActiveRequest (0.09s)
 PASS
-ok  	github.com/facebookgo/httpdown	0.037s
+ok  	github.com/facebookgo/httpdown	0.132s
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
 dh binary --buildsystem=golang --with=golang
@@ -602,12 +638,14 @@
 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/1714461/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1714461/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/4067884 and its subdirectories
-I: Current time: Mon Apr 29 02:28:46 -12 2024
-I: pbuilder-time-stamp: 1714400926
+I: removing directory /srv/workspace/pbuilder/1714461 and its subdirectories
+I: Current time: Mon Jun  2 10:53:33 +14 2025
+I: pbuilder-time-stamp: 1748811213