Diff of the two buildlogs:

--
--- b1/build.log	2025-01-25 20:59:43.746951869 +0000
+++ b2/build.log	2025-01-25 21:01:16.510775186 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Feb 27 15:19:53 -12 2026
-I: pbuilder-time-stamp: 1772248793
+I: Current time: Sun Jan 26 10:59:46 +14 2025
+I: pbuilder-time-stamp: 1737838786
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -22,51 +22,83 @@
 dpkg-source: info: unpacking golang-github-jackc-pgtype_1.10.0-4.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/683878/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/990302/tmp/hooks/D01_modify_environment starting
+debug: Running on infom01-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 Jan 25 20:59 /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/990302/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/990302/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]="37" [3]="1" [4]="release" [5]="x86_64-pc-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=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='36b8050f69894f65b1e36450687e854a'
-  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='683878'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=4f58a06784ba4ab484f98dfce096b7b7
+  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=990302
   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.J1sJXDFS/pbuilderrc_nFJq --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.J1sJXDFS/b1 --logfile b1/build.log golang-github-jackc-pgtype_1.10.0-4.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.J1sJXDFS/pbuilderrc_NCzV --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.J1sJXDFS/b2 --logfile b2/build.log golang-github-jackc-pgtype_1.10.0-4.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 infom02-amd64 6.12.9+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.9-1~bpo12+1 (2025-01-19) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/683878/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/990302/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -209,7 +241,7 @@
 Get: 89 http://deb.debian.org/debian unstable/main amd64 golang-github-jcmturner-gokrb5.v8-dev all 8.4.3-2 [119 kB]
 Get: 90 http://deb.debian.org/debian unstable/main amd64 golang-github-lib-pq-dev all 1.10.9-2 [86.6 kB]
 Get: 91 http://deb.debian.org/debian unstable/main amd64 golang-github-jackc-pgtype-dev all 1.10.0-4 [92.5 kB]
-Fetched 78.9 MB in 3s (28.2 MB/s)
+Fetched 78.9 MB in 12s (6479 kB/s)
 Preconfiguring packages ...
 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 ... 19832 files and directories currently installed.)
@@ -588,7 +620,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-jackc-pgtype-1.10.0/ && 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-jackc-pgtype_1.10.0-4_source.changes
+I: user script /srv/workspace/pbuilder/990302/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/990302/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-jackc-pgtype-1.10.0/ && 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-jackc-pgtype_1.10.0-4_source.changes
 dpkg-buildpackage: info: source package golang-github-jackc-pgtype
 dpkg-buildpackage: info: source version 1.10.0-4
 dpkg-buildpackage: info: source distribution unstable
@@ -609,38 +645,38 @@
 
    dh_auto_build -O--builddirectory=_build -O--buildsystem=golang
 	cd _build && go install -trimpath -v -p 12 github.com/jackc/pgtype github.com/jackc/pgtype/ext/gofrs-uuid github.com/jackc/pgtype/ext/shopspring-numeric github.com/jackc/pgtype/zeronull
-internal/coverage/rtcov
 internal/race
-internal/godebugs
+internal/coverage/rtcov
+internal/unsafeheader
 internal/profilerecord
-internal/runtime/syscall
 internal/byteorder
-internal/goos
-internal/unsafeheader
 internal/goarch
-internal/runtime/atomic
+internal/godebugs
+internal/goos
 internal/cpu
-internal/goexperiment
+internal/runtime/syscall
+internal/runtime/atomic
 sync/atomic
-unicode/utf8
 unicode
-internal/asan
-internal/itoa
-runtime/internal/math
+internal/goexperiment
 internal/abi
-internal/chacha8rand
+runtime/internal/math
+unicode/utf8
 runtime/internal/sys
+internal/asan
+internal/itoa
 internal/msan
+internal/chacha8rand
 cmp
-math/bits
 encoding
 unicode/utf16
 internal/nettrace
+math/bits
 crypto/internal/alias
+internal/bytealg
 crypto/subtle
 crypto/internal/boring/sig
 internal/runtime/exithook
-internal/bytealg
 math
 internal/stringslite
 runtime
@@ -650,44 +686,44 @@
 sync
 slices
 internal/bisect
-internal/testlog
 internal/singleflight
+internal/testlog
 runtime/cgo
-internal/godebug
 errors
-math/rand
 sort
 io
-strconv
 internal/oserror
+internal/godebug
 path
 math/rand/v2
+strconv
 vendor/golang.org/x/net/dns/dnsmessage
-syscall
 internal/concurrent
+math/rand
+syscall
 bytes
-crypto/internal/randutil
 strings
-hash
 unique
-crypto
+hash
+crypto/internal/randutil
 reflect
+crypto
+crypto/cipher
 net/netip
 crypto/md5
-crypto/cipher
 regexp/syntax
 crypto/internal/boring
 crypto/sha1
 internal/syscall/execenv
-internal/syscall/unix
 time
+internal/syscall/unix
 regexp
 context
 io/fs
 internal/poll
 internal/filepathlite
-encoding/binary
 internal/fmtsort
+encoding/binary
 os
 encoding/base64
 github.com/jackc/pgio
@@ -702,8 +738,8 @@
 github.com/shopspring/decimal
 github.com/gofrs/uuid
 github.com/jackc/pgtype
-github.com/jackc/pgtype/ext/gofrs-uuid
 github.com/jackc/pgtype/ext/shopspring-numeric
+github.com/jackc/pgtype/ext/gofrs-uuid
 github.com/jackc/pgtype/zeronull
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/golang-github-jackc-pgtype-1.10.0'
@@ -760,12 +796,14 @@
 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/990302/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/990302/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/683878 and its subdirectories
-I: Current time: Fri Feb 27 15:22:42 -12 2026
-I: pbuilder-time-stamp: 1772248962
+I: removing directory /srv/workspace/pbuilder/990302 and its subdirectories
+I: Current time: Sun Jan 26 11:01:15 +14 2025
+I: pbuilder-time-stamp: 1737838875