Diff of the two buildlogs:

--
--- b1/build.log	2024-11-15 13:45:20.890311985 +0000
+++ b2/build.log	2024-11-15 13:46:51.198239498 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Nov 15 01:44:06 -12 2024
-I: pbuilder-time-stamp: 1731678246
+I: Current time: Fri Dec 19 10:08:23 +14 2025
+I: pbuilder-time-stamp: 1766088503
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,51 +25,83 @@
 dpkg-source: info: unpacking reflex_0.3.1-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2948060/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4076644/tmp/hooks/D01_modify_environment starting
+debug: Running on infom02-amd64.
+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 18 20:08 /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/4076644/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4076644/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='amd64'
-  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]="x86_64-pc-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=amd64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='e313b298ca4f43208093f5d9c859510c'
-  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='2948060'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d0b3e2197abe4cc4a77f858f84bfdaa0
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-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=4076644
   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.6bY2Cq2v/pbuilderrc_d8p7 --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.6bY2Cq2v/b1 --logfile b1/build.log reflex_0.3.1-1.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'
+  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.6bY2Cq2v/pbuilderrc_y7XC --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.6bY2Cq2v/b2 --logfile b2/build.log reflex_0.3.1-1.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'
 I: uname -a
-  Linux infom01-amd64 6.1.0-27-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.115-1 (2024-11-01) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.10.11+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.10.11-1~bpo12+1 (2024-10-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2948060/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Aug  4  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/4076644/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -173,7 +205,7 @@
 Get: 50 http://deb.debian.org/debian unstable/main amd64 golang-github-kr-pretty-dev all 0.3.1-1 [11.9 kB]
 Get: 51 http://deb.debian.org/debian unstable/main amd64 golang-github-kr-pty-dev all 1.1.6-2 [9596 B]
 Get: 52 http://deb.debian.org/debian unstable/main amd64 golang-github-ogier-pflag-dev all 0.0~git20160129.0.45c278a-5.1 [18.2 kB]
-Fetched 75.1 MB in 1s (110 MB/s)
+Fetched 75.1 MB in 1s (61.0 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%
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(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19966 files and directories currently installed.)
@@ -396,7 +428,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/reflex-0.3.1/ && 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  > ../reflex_0.3.1-1_source.changes
+I: user script /srv/workspace/pbuilder/4076644/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/4076644/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/reflex-0.3.1/ && 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  > ../reflex_0.3.1-1_source.changes
 dpkg-buildpackage: info: source package reflex
 dpkg-buildpackage: info: source version 0.3.1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -415,81 +451,81 @@
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
 	cd obj-x86_64-linux-gnu && go install -trimpath -v -p 12 github.com/cespare/reflex
-internal/goarch
-internal/coverage/rtcov
-internal/profilerecord
+internal/unsafeheader
+internal/goexperiment
 internal/byteorder
+internal/profilerecord
 internal/race
-internal/unsafeheader
-internal/godebugs
 internal/goos
-internal/goexperiment
+internal/godebugs
+internal/coverage/rtcov
+internal/goarch
 internal/runtime/syscall
-internal/runtime/atomic
 internal/cpu
-internal/abi
-runtime/internal/math
-runtime/internal/sys
+sync/atomic
+internal/runtime/atomic
+unicode
 unicode/utf8
 cmp
-unicode
 internal/itoa
-internal/chacha8rand
 math/bits
 internal/asan
-sync/atomic
+internal/chacha8rand
+internal/abi
+runtime/internal/math
 internal/msan
+runtime/internal/sys
 internal/nettrace
 log/internal
+internal/runtime/exithook
 internal/bytealg
 math
-internal/runtime/exithook
 internal/stringslite
 runtime
-internal/reflectlite
-internal/weak
 iter
 sync
+internal/reflectlite
+internal/weak
 slices
 internal/bisect
-internal/testlog
 internal/singleflight
+internal/testlog
 runtime/cgo
 errors
-internal/godebug
+sort
 io
-path
 internal/oserror
-strconv
-sort
+internal/godebug
+path
 vendor/golang.org/x/net/dns/dnsmessage
 math/rand/v2
+strconv
+internal/concurrent
 syscall
 bytes
 strings
-internal/concurrent
 unique
+net/netip
 reflect
+regexp/syntax
 bufio
 github.com/kballard/go-shellquote
-regexp/syntax
-net/netip
+regexp
 internal/syscall/execenv
-internal/syscall/unix
 time
-regexp
-io/fs
+internal/syscall/unix
 context
+io/fs
 internal/poll
-internal/filepathlite
 internal/fmtsort
 encoding/binary
+internal/filepathlite
 os
 golang.org/x/sys/unix
 fmt
 io/ioutil
-path/filepath
 os/signal
+path/filepath
 net
 os/exec
 github.com/creack/pty
@@ -515,7 +551,7 @@
 === RUN   TestDefaultExcludes
 --- PASS: TestDefaultExcludes (0.00s)
 PASS
-ok  	github.com/cespare/reflex	0.003s
+ok  	github.com/cespare/reflex	0.004s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -554,12 +590,14 @@
 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/4076644/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4076644/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/2948060 and its subdirectories
-I: Current time: Fri Nov 15 01:45:20 -12 2024
-I: pbuilder-time-stamp: 1731678320
+I: removing directory /srv/workspace/pbuilder/4076644 and its subdirectories
+I: Current time: Fri Dec 19 10:09:50 +14 2025
+I: pbuilder-time-stamp: 1766088590