Diff of the two buildlogs:

--
--- b1/build.log	2024-11-12 21:24:28.380482466 +0000
+++ b2/build.log	2024-11-12 21:25:56.133357801 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Nov 12 09:22:49 -12 2024
-I: pbuilder-time-stamp: 1731446569
+I: Current time: Tue Dec 16 17:47:32 +14 2025
+I: pbuilder-time-stamp: 1765856852
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -28,52 +28,84 @@
 dpkg-source: info: applying fix-FTBFS.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/143368/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1941546/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 Dec 16 03:47 /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/1941546/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1941546/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]="32" [3]="1" [4]="release" [5]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='8f7ea06ab5f44bccbe9ec81696611fdf'
-  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='143368'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=3d58e1eaad3c435180643d91f6249f87
+  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=1941546
   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.5QmTdLrL/pbuilderrc_eKqv --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.5QmTdLrL/b1 --logfile b1/build.log golang-github-tonistiigi-fsutil_0.0~git20240424.91a3fc4-1.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.5QmTdLrL/pbuilderrc_ZYiq --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.5QmTdLrL/b2 --logfile b2/build.log golang-github-tonistiigi-fsutil_0.0~git20240424.91a3fc4-1.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 codethink02-arm64 6.1.0-27-cloud-arm64 #1 SMP Debian 6.1.115-1 (2024-11-01) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-27-cloud-arm64 #1 SMP Debian 6.1.115-1 (2024-11-01) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/143368/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1941546/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -517,7 +549,7 @@
 Get: 382 http://deb.debian.org/debian unstable/main arm64 golang-github-hashicorp-serf-dev all 0.10.1-1 [131 kB]
 Get: 383 http://deb.debian.org/debian unstable/main arm64 golang-github-ishidawataru-sctp-dev all 0.0+git20210707.9a39160-1 [13.1 kB]
 Get: 384 http://deb.debian.org/debian unstable/main arm64 golang-github-docker-docker-dev all 26.1.5+dfsg1-4 [1545 kB]
-Fetched 179 MB in 1s (174 MB/s)
+Fetched 179 MB in 1s (180 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package golang-golang-x-sys-dev.
 (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 ... 20088 files and directories currently installed.)
@@ -1757,8 +1789,8 @@
 Setting up tzdata (2024b-3) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Nov 12 21:23:36 UTC 2024.
-Universal Time is now:  Tue Nov 12 21:23:36 UTC 2024.
+Local time is now:      Tue Dec 16 03:48:16 UTC 2025.
+Universal Time is now:  Tue Dec 16 03:48:16 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up golang-github-coreos-go-semver-dev (0.3.0-1) ...
@@ -2074,7 +2106,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-tonistiigi-fsutil-0.0~git20240424.91a3fc4/ && 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-tonistiigi-fsutil_0.0~git20240424.91a3fc4-1_source.changes
+I: user script /srv/workspace/pbuilder/1941546/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1941546/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-tonistiigi-fsutil-0.0~git20240424.91a3fc4/ && 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-tonistiigi-fsutil_0.0~git20240424.91a3fc4-1_source.changes
 dpkg-buildpackage: info: source package golang-github-tonistiigi-fsutil
 dpkg-buildpackage: info: source version 0.0~git20240424.91a3fc4-1
 dpkg-buildpackage: info: source distribution unstable
@@ -2142,28 +2178,28 @@
 src/github.com/tonistiigi/fsutil/types/wire.pb.go
 src/github.com/tonistiigi/fsutil/util/protostream.go
 	cd _build && go install -trimpath -v -p 12 github.com/tonistiigi/fsutil github.com/tonistiigi/fsutil/bench github.com/tonistiigi/fsutil/cmd/receive github.com/tonistiigi/fsutil/cmd/send github.com/tonistiigi/fsutil/cmd/walk github.com/tonistiigi/fsutil/copy github.com/tonistiigi/fsutil/types github.com/tonistiigi/fsutil/util
+internal/unsafeheader
 internal/goarch
 internal/goexperiment
-internal/coverage/rtcov
+internal/cpu
+unicode
 internal/godebugs
-internal/goos
-internal/unsafeheader
-internal/profilerecord
 sync/atomic
-internal/abi
-runtime/internal/math
 internal/byteorder
-unicode
 internal/runtime/syscall
-internal/cpu
-runtime/internal/sys
-internal/chacha8rand
 internal/race
+internal/coverage/rtcov
+internal/goos
+internal/profilerecord
+internal/abi
+runtime/internal/math
 unicode/utf8
 cmp
 internal/itoa
+runtime/internal/sys
 math/bits
 internal/asan
+internal/chacha8rand
 internal/msan
 encoding
 unicode/utf16
@@ -2171,69 +2207,69 @@
 crypto/internal/alias
 crypto/subtle
 crypto/internal/boring/sig
-math
-internal/bytealg
 internal/runtime/atomic
-internal/runtime/exithook
+internal/bytealg
+math
 internal/stringslite
+internal/runtime/exithook
 runtime
 internal/reflectlite
-sync
 iter
+sync
 slices
 internal/bisect
 internal/testlog
 runtime/cgo
-internal/godebug
 errors
 sort
 io
-bytes
-math/rand
 strconv
-strings
+github.com/gogo/protobuf/sortkeys
+internal/godebug
 internal/oserror
 path
-crypto/internal/randutil
-hash
-github.com/gogo/protobuf/sortkeys
-bufio
-crypto/cipher
+bytes
 syscall
+hash
+crypto/internal/randutil
+math/rand
+strings
 reflect
 crypto
-regexp/syntax
+crypto/cipher
+bufio
 crypto/internal/boring
-regexp
+regexp/syntax
+internal/syscall/execenv
 time
 internal/syscall/unix
-internal/syscall/execenv
+regexp
 context
-internal/poll
 io/fs
+internal/poll
 internal/fmtsort
 encoding/binary
 internal/filepathlite
-os
-golang.org/x/sys/unix
 encoding/base64
-fmt
-path/filepath
+golang.org/x/sys/unix
+os
 io/ioutil
+path/filepath
+fmt
+text/scanner
 os/user
-github.com/pkg/errors
 log
+github.com/pkg/errors
 golang.org/x/sync/errgroup
-text/scanner
-encoding/hex
 github.com/opencontainers/go-digest
+encoding/hex
 encoding/json
-math/big
 flag
+math/big
 github.com/moby/patternmatcher
 github.com/containerd/continuity/sysx
-github.com/gogo/protobuf/proto
 github.com/sirupsen/logrus
+github.com/gogo/protobuf/proto
 crypto/rand
 github.com/containerd/continuity/fs
 archive/tar
@@ -2291,7 +2327,7 @@
 === RUN   TestWalkerPermissionDenied
 --- PASS: TestWalkerPermissionDenied (0.00s)
 === RUN   TestWalkerDoublestarInclude
---- PASS: TestWalkerDoublestarInclude (0.01s)
+--- PASS: TestWalkerDoublestarInclude (0.00s)
 === RUN   TestFSWalk
 --- PASS: TestFSWalk (0.00s)
 === RUN   TestFSWalkNested
@@ -2340,7 +2376,7 @@
 === RUN   TestCopyDirectoryTimestamps
 --- PASS: TestCopyDirectoryTimestamps (0.00s)
 === RUN   TestCopySwitchDirToFile
---- PASS: TestCopySwitchDirToFile (0.01s)
+--- PASS: TestCopySwitchDirToFile (0.00s)
 === RUN   TestHardlinkFilter
 --- PASS: TestHardlinkFilter (0.00s)
 === RUN   TestCopySimple
@@ -2381,10 +2417,10 @@
 === RUN   TestValidatorSkipDir
 --- PASS: TestValidatorSkipDir (0.00s)
 PASS
-ok  	github.com/tonistiigi/fsutil	0.378s
+ok  	github.com/tonistiigi/fsutil	0.350s
 testing: warning: no tests to run
 PASS
-ok  	github.com/tonistiigi/fsutil/bench	0.052s [no tests to run]
+ok  	github.com/tonistiigi/fsutil/bench	0.017s [no tests to run]
 === RUN   TestCopyDirectory
 --- PASS: TestCopyDirectory (0.00s)
 === RUN   TestCopyDirectoryWithLocalSymlink
@@ -2430,7 +2466,7 @@
 === RUN   TestCopyIncludeExclude/doublestar_matching_first_item_in_path
 === RUN   TestCopyIncludeExclude/doublestar_exclude
 === RUN   TestCopyIncludeExclude/exclude_bar/baz
---- PASS: TestCopyIncludeExclude (0.02s)
+--- PASS: TestCopyIncludeExclude (0.01s)
     --- PASS: TestCopyIncludeExclude/include_bar (0.00s)
     --- PASS: TestCopyIncludeExclude/include_* (0.00s)
     --- PASS: TestCopyIncludeExclude/include_bar/foo (0.00s)
@@ -2459,7 +2495,7 @@
     copy_unix_test.go:62: skipping test that requires root
 --- SKIP: TestCopySetuid (0.00s)
 PASS
-ok  	github.com/tonistiigi/fsutil/copy	0.056s
+ok  	github.com/tonistiigi/fsutil/copy	0.047s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -2489,12 +2525,14 @@
 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/1941546/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1941546/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/143368 and its subdirectories
-I: Current time: Tue Nov 12 09:24:27 -12 2024
-I: pbuilder-time-stamp: 1731446667
+I: removing directory /srv/workspace/pbuilder/1941546 and its subdirectories
+I: Current time: Tue Dec 16 17:48:54 +14 2025
+I: pbuilder-time-stamp: 1765856934