Diff of the two buildlogs:

--
--- b1/build.log	2025-03-03 13:58:06.186945909 +0000
+++ b2/build.log	2025-03-03 14:02:59.713656976 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Mar  3 01:56:05 -12 2025
-I: pbuilder-time-stamp: 1741010165
+I: Current time: Tue Mar  4 03:58:17 +14 2025
+I: pbuilder-time-stamp: 1741010297
 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-gdamore-encoding_1.0.1-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/19926/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/26062/tmp/hooks/D01_modify_environment starting
+debug: Running on cbxi4a.
+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 Mar  3 13:58 /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/26062/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/26062/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=3 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='444e8caf98ab43b1965be8ccdf951b80'
-  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='19926'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=aab69d02671c411eb8a62634df856e0f
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=26062
   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.OC84XxjB/pbuilderrc_dN06 --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.OC84XxjB/b1 --logfile b1/build.log golang-github-gdamore-encoding_1.0.1-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.OC84XxjB/pbuilderrc_Lxcs --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.OC84XxjB/b2 --logfile b2/build.log golang-github-gdamore-encoding_1.0.1-1.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux virt64c 6.1.0-31-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-23-armmp #1 SMP Debian 6.1.99-1 (2024-07-15) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/19926/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/26062/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -146,7 +178,7 @@
 Get: 35 http://deb.debian.org/debian trixie/main armhf golang-go armhf 2:1.24~2 [44.3 kB]
 Get: 36 http://deb.debian.org/debian trixie/main armhf golang-any armhf 2:1.24~2 [5216 B]
 Get: 37 http://deb.debian.org/debian trixie/main armhf golang-golang-x-text-dev all 0.22.0-1 [3995 kB]
-Fetched 69.3 MB in 1s (63.5 MB/s)
+Fetched 69.3 MB in 4s (19.5 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 ... 19527 files and directories currently installed.)
@@ -309,7 +341,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-gdamore-encoding-1.0.1/ && 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  > ../golang-github-gdamore-encoding_1.0.1-1_source.changes
+I: user script /srv/workspace/pbuilder/26062/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/26062/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-gdamore-encoding-1.0.1/ && 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  > ../golang-github-gdamore-encoding_1.0.1-1_source.changes
 dpkg-buildpackage: info: source package golang-github-gdamore-encoding
 dpkg-buildpackage: info: source version 1.0.1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -327,17 +363,17 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 3 github.com/gdamore/encoding
+	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 4 github.com/gdamore/encoding
 internal/goarch
 internal/unsafeheader
-internal/cpu
 internal/byteorder
-internal/abi
-internal/chacha8rand
-internal/bytealg
+internal/cpu
 internal/coverage/rtcov
+internal/abi
 internal/godebugs
+internal/chacha8rand
 internal/goexperiment
+internal/bytealg
 internal/goos
 internal/profilerecord
 internal/runtime/atomic
@@ -345,22 +381,22 @@
 internal/msan
 internal/runtime/math
 internal/runtime/sys
-internal/runtime/exithook
 internal/runtime/syscall
 internal/stringslite
 golang.org/x/text/encoding/internal/identifier
 sync/atomic
 math/bits
-internal/race
+internal/runtime/exithook
 unicode
-internal/sync
-internal/runtime/maps
 unicode/utf8
 math
+internal/race
+internal/sync
+internal/runtime/maps
 runtime
+iter
 internal/reflectlite
 sync
-iter
 errors
 io
 strconv
@@ -369,13 +405,13 @@
 golang.org/x/text/encoding
 github.com/gdamore/encoding
    dh_auto_test -O--buildsystem=golang
-	cd obj-arm-linux-gnueabihf && go test -vet=off -v -p 3 github.com/gdamore/encoding
+	cd obj-arm-linux-gnueabihf && go test -vet=off -v -p 4 github.com/gdamore/encoding
 === RUN   TestASCII
     ascii_test.go:22: ASCII identity transforms
     ascii_test.go:27: High order bytes map to RuneError
     ascii_test.go:32: High order UTF maps to ASCIISub
     ascii_test.go:37: Large UTF maps to ASCIISub
---- PASS: TestASCII (0.00s)
+--- PASS: TestASCII (0.01s)
 === RUN   TestEBCDICvsASCII
     ebcdic_test.go:118: EBCDIC/ASCII identity values
 --- PASS: TestEBCDICvsASCII (0.00s)
@@ -388,11 +424,11 @@
 === RUN   TestISO8859_1
     latin1_test.go:22: 8859-1 identity transforms
     latin1_test.go:27: Large UTF maps to ASCIISub
---- PASS: TestISO8859_1 (0.00s)
+--- PASS: TestISO8859_1 (0.01s)
 === RUN   TestISO8859_9
     latin5_test.go:22: 8859-9 identity transforms
     latin5_test.go:42: Large UTF maps to ASCIISub
---- PASS: TestISO8859_9 (0.00s)
+--- PASS: TestISO8859_9 (0.01s)
 === RUN   TestUTF8
     utf8_test.go:25: ASCII UTF8 identity transforms
 --- PASS: TestUTF8 (0.00s)
@@ -403,7 +439,7 @@
 === RUN   TestSrcShortUTF8
 --- PASS: TestSrcShortUTF8 (0.00s)
 PASS
-ok  	github.com/gdamore/encoding	0.016s
+ok  	github.com/gdamore/encoding	0.059s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -430,12 +466,14 @@
 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/26062/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/26062/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/19926 and its subdirectories
-I: Current time: Mon Mar  3 01:58:02 -12 2025
-I: pbuilder-time-stamp: 1741010282
+I: removing directory /srv/workspace/pbuilder/26062 and its subdirectories
+I: Current time: Tue Mar  4 04:02:55 +14 2025
+I: pbuilder-time-stamp: 1741010575