Diff of the two buildlogs:

--
--- b1/build.log	2024-11-26 19:18:03.723529136 +0000
+++ b2/build.log	2024-11-26 19:18:35.610089201 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Nov 26 07:17:33 -12 2024
-I: pbuilder-time-stamp: 1732648653
+I: Current time: Tue Dec 30 15:41:05 +14 2025
+I: pbuilder-time-stamp: 1767058865
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -27,53 +27,85 @@
 dpkg-source: info: unpacking golang-github-glycerine-go-unsnap-stream_0.0~git20210130.47dfef3-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/27707/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/9503/tmp/hooks/D01_modify_environment starting
+debug: Running on infom08-i386.
+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 30 01:41 /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/9503/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/9503/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='i386'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=6 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='i386'
+  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]="i686-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=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=5 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='5e96c59234384bad951c05b5170bee1b'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  LD_LIBRARY_PATH='/usr/lib/libeatmydata'
-  LD_PRELOAD='libeatmydata.so'
-  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='27707'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=98ec07c9e5964209ae995fa5de054864
+  LANG=C
+  LANGUAGE=de_CH:de
+  LC_ALL=C
+  LD_LIBRARY_PATH=/usr/lib/libeatmydata
+  LD_PRELOAD=libeatmydata.so
+  MACHTYPE=i686-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=9503
   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.w9a2OWzt/pbuilderrc_qjo1 --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.w9a2OWzt/b1 --logfile b1/build.log golang-github-glycerine-go-unsnap-stream_0.0~git20210130.47dfef3-1.dsc'
-  SUDO_GID='111'
-  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.w9a2OWzt/pbuilderrc_f7rr --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.w9a2OWzt/b2 --logfile b2/build.log golang-github-glycerine-go-unsnap-stream_0.0~git20210130.47dfef3-1.dsc'
+  SUDO_GID=111
+  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 infom07-i386 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.11.5+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.11.5-1~bpo12+1 (2024-11-11) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/27707/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/9503/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -152,7 +184,7 @@
 Get: 35 http://deb.debian.org/debian unstable/main i386 golang-any i386 2:1.23~2 [5168 B]
 Get: 36 http://deb.debian.org/debian unstable/main i386 golang-github-golang-snappy-dev all 0.0.2-3 [53.9 kB]
 Get: 37 http://deb.debian.org/debian unstable/main i386 golang-snappy-go-dev all 0.0.2-3 [3084 B]
-Fetched 64.4 MB in 1s (99.1 MB/s)
+Fetched 64.4 MB in 1s (128 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 ... 19951 files and directories currently installed.)
@@ -315,7 +347,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-glycerine-go-unsnap-stream-0.0~git20210130.47dfef3/ && 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-glycerine-go-unsnap-stream_0.0~git20210130.47dfef3-1_source.changes
+I: user script /srv/workspace/pbuilder/9503/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/9503/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-glycerine-go-unsnap-stream-0.0~git20210130.47dfef3/ && 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-glycerine-go-unsnap-stream_0.0~git20210130.47dfef3-1_source.changes
 dpkg-buildpackage: info: source package golang-github-glycerine-go-unsnap-stream
 dpkg-buildpackage: info: source version 0.0~git20210130.47dfef3-1
 dpkg-buildpackage: info: source distribution unstable
@@ -333,35 +369,35 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go install -trimpath -v -p 6 github.com/glycerine/go-unsnap-stream
-internal/goarch
+	cd obj-i686-linux-gnu && go install -trimpath -v -p 5 github.com/glycerine/go-unsnap-stream
+internal/unsafeheader
 internal/byteorder
+internal/goarch
 internal/coverage/rtcov
 internal/cpu
-internal/unsafeheader
 internal/godebugs
+internal/abi
 internal/chacha8rand
 internal/goexperiment
-internal/abi
 internal/goos
 internal/profilerecord
 internal/runtime/atomic
 internal/runtime/syscall
+internal/bytealg
 runtime/internal/math
 runtime/internal/sys
 internal/race
 sync/atomic
+internal/runtime/exithook
 unicode
+internal/stringslite
 unicode/utf8
-internal/runtime/exithook
-internal/bytealg
-math/bits
 internal/itoa
+math/bits
 cmp
-math
 internal/asan
 internal/msan
-internal/stringslite
+math
 runtime
 internal/reflectlite
 iter
@@ -369,28 +405,28 @@
 slices
 internal/bisect
 internal/testlog
-errors
 internal/godebug
+errors
+internal/oserror
+path
 io
 strconv
-path
-internal/oserror
 syscall
 bytes
-hash
 strings
+hash
 hash/crc32
 reflect
+internal/syscall/execenv
 time
 internal/syscall/unix
-internal/syscall/execenv
-encoding/binary
-internal/fmtsort
 io/fs
 internal/poll
-github.com/golang/snappy
 internal/filepathlite
+internal/fmtsort
+encoding/binary
 os
+github.com/golang/snappy
 io/ioutil
 fmt
 github.com/glycerine/go-unsnap-stream
@@ -426,12 +462,14 @@
 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/9503/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/9503/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/27707 and its subdirectories
-I: Current time: Tue Nov 26 07:18:02 -12 2024
-I: pbuilder-time-stamp: 1732648682
+I: removing directory /srv/workspace/pbuilder/9503 and its subdirectories
+I: Current time: Tue Dec 30 15:41:33 +14 2025
+I: pbuilder-time-stamp: 1767058893