Diff of the two buildlogs:

--
--- b1/build.log	2023-04-09 15:43:25.397940446 +0000
+++ b2/build.log	2023-04-09 15:44:47.547201358 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Apr  9 03:42:01 -12 2023
-I: pbuilder-time-stamp: 1681054921
+I: Current time: Sun May 12 12:06:28 +14 2024
+I: pbuilder-time-stamp: 1715465188
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./golang-github-dnaeon-go-vcr_1.2.0.orig.tar.xz]
 I: copying [./golang-github-dnaeon-go-vcr_1.2.0-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Mon Oct 24 04:06:19 2022 -12
+gpgv: Signature made Tue Oct 25 06:06:19 2022 +14
 gpgv:                using RSA key 303F687A4EFCB1AE7C1A35A3B700173FBB805A29
 gpgv:                issuer "dswarbrick@debian.org"
 gpgv: Can't check signature: No public key
@@ -26,11 +26,20 @@
 dpkg-source: info: unpacking golang-github-dnaeon-go-vcr_1.2.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/9867/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/22864/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink9-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
+lrwxrwxrwx 1 root root 4 Jan  6  2023 /bin/sh -> dash
+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/22864/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/22864/tmp/hooks/D02_print_environment starting
 I: set
   BUILDDIR='/build'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
+  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=8'
@@ -40,38 +49,38 @@
   IFS=' 	
   '
   LANG='C'
-  LANGUAGE='en_US:en'
+  LANGUAGE='nl_BE:nl'
   LC_ALL='C'
   MAIL='/var/mail/root'
   OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
+  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'
-  PPID='9867'
+  PPID='22864'
   PS1='# '
   PS2='> '
   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.6C6CA0Cq/pbuilderrc_2wLE --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.6C6CA0Cq/b1 --logfile b1/build.log golang-github-dnaeon-go-vcr_1.2.0-1.dsc'
+  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.6C6CA0Cq/pbuilderrc_fh8A --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.6C6CA0Cq/b2 --logfile b2/build.log --extrapackages usrmerge golang-github-dnaeon-go-vcr_1.2.0-1.dsc'
   SUDO_GID='117'
   SUDO_UID='110'
   SUDO_USER='jenkins'
   TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
+  TZ='/usr/share/zoneinfo/Etc/GMT-14'
   USER='root'
   USERNAME='root'
   _='/usr/bin/systemd-run'
   http_proxy='http://192.168.101.16:3128'
 I: uname -a
-  Linux codethink10-arm64 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr  7 22:25 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/9867/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 12 06:48 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/22864/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -150,7 +159,7 @@
 Get: 35 http://deb.debian.org/debian bookworm/main arm64 golang-go arm64 2:1.19~1 [45.0 kB]
 Get: 36 http://deb.debian.org/debian bookworm/main arm64 golang-any arm64 2:1.19~1 [5876 B]
 Get: 37 http://deb.debian.org/debian bookworm/main arm64 golang-gopkg-yaml.v2-dev all 2.4.0-4 [61.5 kB]
-Fetched 93.4 MB in 2s (62.0 MB/s)
+Fetched 93.4 MB in 6s (16.3 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 ... 19616 files and directories currently installed.)
@@ -312,8 +321,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/golang-github-dnaeon-go-vcr-1.2.0/ && 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-dnaeon-go-vcr_1.2.0-1_source.changes
+I: user script /srv/workspace/pbuilder/22864/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/22864/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/golang-github-dnaeon-go-vcr-1.2.0/ && 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-dnaeon-go-vcr_1.2.0-1_source.changes
 dpkg-buildpackage: info: source package golang-github-dnaeon-go-vcr
 dpkg-buildpackage: info: source version 1.2.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -332,27 +350,27 @@
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
 	cd obj-aarch64-linux-gnu && go install -trimpath -v -p 8 github.com/dnaeon/go-vcr/cassette github.com/dnaeon/go-vcr/recorder
+internal/goarch
 internal/unsafeheader
-internal/goexperiment
 internal/itoa
-internal/goarch
+internal/goexperiment
 internal/goos
-internal/cpu
-math/bits
 runtime/internal/syscall
-unicode/utf8
-internal/race
+math/bits
+internal/cpu
 internal/abi
 runtime/internal/math
 runtime/internal/sys
+unicode/utf8
+internal/race
 sync/atomic
-encoding
 unicode
+encoding
 container/list
 crypto/internal/subtle
 crypto/subtle
-math
 crypto/internal/boring/sig
+math
 unicode/utf16
 internal/bytealg
 runtime/internal/atomic
@@ -360,33 +378,33 @@
 internal/nettrace
 vendor/golang.org/x/crypto/internal/subtle
 runtime
-internal/reflectlite
 sync
-internal/singleflight
+internal/reflectlite
 internal/testlog
+internal/singleflight
 math/rand
 runtime/cgo
 errors
 sort
 internal/oserror
-io
-strconv
 internal/safefilepath
+io
 path
+strconv
 crypto/internal/nistec/fiat
 syscall
 vendor/golang.org/x/net/dns/dnsmessage
-strings
 bytes
+strings
 hash
 hash/crc32
 crypto/internal/randutil
 crypto
 reflect
 crypto/rc4
-vendor/golang.org/x/text/transform
 regexp/syntax
 bufio
+vendor/golang.org/x/text/transform
 net/http/internal/ascii
 internal/syscall/unix
 internal/syscall/execenv
@@ -396,44 +414,44 @@
 io/fs
 internal/poll
 embed
+os
 internal/fmtsort
 encoding/binary
-os
+crypto/md5
+vendor/golang.org/x/crypto/curve25519/internal/field
 encoding/base64
+vendor/golang.org/x/crypto/internal/poly1305
 crypto/internal/edwards25519/field
 crypto/cipher
-crypto/md5
 crypto/internal/nistec
-vendor/golang.org/x/crypto/internal/poly1305
-vendor/golang.org/x/crypto/curve25519/internal/field
+fmt
+io/ioutil
 encoding/pem
+internal/godebug
+path/filepath
+internal/intern
 crypto/internal/edwards25519
-crypto/internal/boring
 crypto/des
 vendor/golang.org/x/crypto/chacha20
+crypto/internal/boring
+net/netip
+crypto/aes
 crypto/sha512
 crypto/hmac
-crypto/aes
-fmt
-io/ioutil
 crypto/sha1
 crypto/sha256
-internal/godebug
-path/filepath
 vendor/golang.org/x/crypto/chacha20poly1305
-internal/intern
 vendor/golang.org/x/crypto/hkdf
-net/netip
-gopkg.in/yaml.v2
-encoding/hex
+net
 vendor/golang.org/x/crypto/curve25519
-net/url
+encoding/hex
 log
+net/url
 compress/flate
 math/big
-vendor/golang.org/x/net/http2/hpack
-net
+gopkg.in/yaml.v2
 vendor/golang.org/x/text/unicode/norm
+vendor/golang.org/x/net/http2/hpack
 vendor/golang.org/x/text/unicode/bidi
 mime
 mime/quotedprintable
@@ -500,9 +518,9 @@
     recorder_test.go:298: make http requests
     recorder_test.go:305: server shut down
     recorder_test.go:308: recorder stopped
---- PASS: TestSaveFilter (0.01s)
+--- PASS: TestSaveFilter (0.00s)
 PASS
-ok  	github.com/dnaeon/go-vcr/recorder	0.046s
+ok  	github.com/dnaeon/go-vcr/recorder	0.034s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -532,12 +550,14 @@
 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/22864/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/22864/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/9867 and its subdirectories
-I: Current time: Sun Apr  9 03:43:24 -12 2023
-I: pbuilder-time-stamp: 1681055004
+I: removing directory /srv/workspace/pbuilder/22864 and its subdirectories
+I: Current time: Sun May 12 12:07:46 +14 2024
+I: pbuilder-time-stamp: 1715465266