Diff of the two buildlogs:

--
--- b1/build.log	2025-03-19 03:04:35.525869682 +0000
+++ b2/build.log	2025-03-19 03:05:33.235278443 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Mar 18 15:02:54 -12 2025
-I: pbuilder-time-stamp: 1742353374
+I: Current time: Tue Apr 21 23:27:37 +14 2026
+I: pbuilder-time-stamp: 1776763657
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -22,52 +22,84 @@
 dpkg-source: info: unpacking golang-github-pion-datachannel_1.5.5-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3831396/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1546526/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 Apr 21 09:27 /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/1546526/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1546526/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]="37" [3]="1" [4]="release" [5]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='1852c332d8624116a30602d18f40ee4c'
-  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='3831396'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=83594ea2c0ae476c9e5584e9034284ab
+  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=1546526
   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.dGkSl0Cb/pbuilderrc_bHE5 --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.dGkSl0Cb/b1 --logfile b1/build.log golang-github-pion-datachannel_1.5.5-1.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.dGkSl0Cb/pbuilderrc_iZtu --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.dGkSl0Cb/b2 --logfile b2/build.log golang-github-pion-datachannel_1.5.5-1.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 codethink04-arm64 6.1.0-32-cloud-arm64 #1 SMP Debian 6.1.129-1 (2025-03-06) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-32-cloud-arm64 #1 SMP Debian 6.1.129-1 (2025-03-06) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3831396/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1546526/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -167,7 +199,7 @@
 Get: 50 http://deb.debian.org/debian trixie/main arm64 golang-github-stretchr-objx-dev all 0.5.2-1 [25.5 kB]
 Get: 51 http://deb.debian.org/debian trixie/main arm64 golang-gopkg-yaml.v3-dev all 3.0.1-3 [74.3 kB]
 Get: 52 http://deb.debian.org/debian trixie/main arm64 golang-github-stretchr-testify-dev all 1.10.0-1 [78.4 kB]
-Fetched 75.2 MB in 1s (108 MB/s)
+Fetched 75.2 MB in 0s (237 MB/s)
 Preconfiguring packages ...
 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 ... 19899 files and directories currently installed.)
@@ -390,7 +422,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-pion-datachannel-1.5.5/ && 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-pion-datachannel_1.5.5-1_source.changes
+I: user script /srv/workspace/pbuilder/1546526/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/1546526/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-pion-datachannel-1.5.5/ && 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-pion-datachannel_1.5.5-1_source.changes
 dpkg-buildpackage: info: source package golang-github-pion-datachannel
 dpkg-buildpackage: info: source version 1.5.5-1
 dpkg-buildpackage: info: source distribution unstable
@@ -409,29 +445,29 @@
    dh_auto_configure -O--builddirectory=_build -O--buildsystem=golang
    dh_auto_build -O--builddirectory=_build -O--buildsystem=golang
 	cd _build && go install -trimpath -v -p 12 github.com/pion/datachannel
-internal/coverage/rtcov
-internal/asan
-internal/msan
-internal/goos
+internal/byteorder
 internal/goarch
-internal/cpu
 internal/profilerecord
+internal/msan
+internal/godebugs
 internal/unsafeheader
+internal/asan
+internal/goos
 internal/goexperiment
-internal/byteorder
-internal/runtime/syscall
-internal/godebugs
+internal/coverage/rtcov
 math/bits
-sync/atomic
+internal/runtime/math
+internal/cpu
+internal/abi
 internal/itoa
+sync/atomic
 unicode/utf8
+internal/runtime/syscall
 unicode
+internal/chacha8rand
 cmp
 log/internal
-internal/abi
-internal/runtime/math
 crypto/internal/fips140/alias
-internal/chacha8rand
 crypto/internal/fips140deps/byteorder
 crypto/internal/boring/sig
 internal/nettrace
@@ -444,8 +480,8 @@
 internal/runtime/exithook
 internal/stringslite
 internal/race
-internal/runtime/maps
 internal/sync
+internal/runtime/maps
 runtime
 internal/reflectlite
 sync
@@ -457,47 +493,47 @@
 sort
 internal/bisect
 internal/testlog
-io
 internal/singleflight
-strconv
 unique
+io
+strconv
 internal/oserror
-math/rand/v2
 path
+math/rand/v2
 vendor/golang.org/x/net/dns/dnsmessage
+internal/godebug
 runtime/cgo
 syscall
-internal/godebug
 strings
 bytes
 hash
+hash/crc32
 crypto/internal/randutil
-crypto/internal/fips140deps/godebug
-math/rand
 reflect
 crypto
-crypto/internal/fips140
 crypto/internal/impl
+math/rand
 net/netip
-hash/crc32
+crypto/internal/fips140deps/godebug
+crypto/internal/fips140
 crypto/internal/fips140/sha256
 crypto/internal/fips140/sha3
 crypto/internal/fips140/sha512
 crypto/internal/fips140/hmac
 crypto/internal/fips140/check
-crypto/internal/fips140/aes
 time
 internal/syscall/unix
 internal/syscall/execenv
+crypto/internal/fips140/aes
 io/fs
 internal/poll
 context
 internal/filepathlite
+os
 encoding/binary
 internal/fmtsort
-os
-fmt
 crypto/internal/sysrand
+fmt
 net
 crypto/internal/entropy
 crypto/internal/fips140/drbg
@@ -522,19 +558,19 @@
 === RUN   TestDataChannel/ChannelTypePartialReliableRexmitUnordered
 === RUN   TestDataChannel/ChannelTypePartialReliableTimed
 === RUN   TestDataChannel/ChannelTypePartialReliableTimedUnordered
---- PASS: TestDataChannel (1.86s)
+--- PASS: TestDataChannel (1.83s)
     --- PASS: TestDataChannel/ChannelTypeReliableOrdered (0.16s)
-    --- PASS: TestDataChannel/ChannelTypeReliableUnordered (0.27s)
-    --- PASS: TestDataChannel/ChannelTypePartialReliableRexmit (0.43s)
+    --- PASS: TestDataChannel/ChannelTypeReliableUnordered (0.26s)
+    --- PASS: TestDataChannel/ChannelTypePartialReliableRexmit (0.42s)
     --- PASS: TestDataChannel/ChannelTypePartialReliableRexmitUnordered (0.30s)
     --- PASS: TestDataChannel/ChannelTypePartialReliableTimed (0.41s)
-    --- PASS: TestDataChannel/ChannelTypePartialReliableTimedUnordered (0.30s)
+    --- PASS: TestDataChannel/ChannelTypePartialReliableTimedUnordered (0.28s)
 === RUN   TestDataChannelBufferedAmount
---- PASS: TestDataChannelBufferedAmount (0.88s)
+--- PASS: TestDataChannelBufferedAmount (0.86s)
 === RUN   TestStats
 --- PASS: TestStats (0.16s)
 === RUN   TestDataChannelAcceptWrite
---- PASS: TestDataChannelAcceptWrite (0.16s)
+--- PASS: TestDataChannelAcceptWrite (0.17s)
 === RUN   TestOnOpen
 --- PASS: TestOnOpen (0.36s)
 === RUN   TestReadDeadline
@@ -548,7 +584,7 @@
 === RUN   TestChannelAckUnmarshal
 --- PASS: TestChannelAckUnmarshal (0.00s)
 PASS
-ok  	github.com/pion/datachannel	3.721s
+ok  	github.com/pion/datachannel	3.728s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -575,12 +611,14 @@
 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/1546526/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1546526/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/3831396 and its subdirectories
-I: Current time: Tue Mar 18 15:04:34 -12 2025
-I: pbuilder-time-stamp: 1742353474
+I: removing directory /srv/workspace/pbuilder/1546526 and its subdirectories
+I: Current time: Tue Apr 21 23:28:31 +14 2026
+I: pbuilder-time-stamp: 1776763711