Diff of the two buildlogs:

--
--- b1/build.log	2025-02-05 19:34:35.632165822 +0000
+++ b2/build.log	2025-02-05 19:37:52.867233955 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Feb  5 07:32:12 -12 2025
-I: pbuilder-time-stamp: 1738783932
+I: Current time: Thu Feb  6 09:34:47 +14 2025
+I: pbuilder-time-stamp: 1738784087
 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-filippo-edwards25519_1.0.0~rc1+git20210721-0.1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/15366/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/6852/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64c.
+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 Feb  5 19:35 /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/6852/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/6852/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='d897dca52f1e4274a35438fc8a18453f'
-  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='15366'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=cae76c4661324776a6d8c86fe14f21a4
+  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=6852
   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.wJx8XgxY/pbuilderrc_TpE7 --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.wJx8XgxY/b1 --logfile b1/build.log golang-filippo-edwards25519_1.0.0~rc1+git20210721-0.1.dsc'
-  SUDO_GID='110'
-  SUDO_UID='103'
-  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.wJx8XgxY/pbuilderrc_Ri0c --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.wJx8XgxY/b2 --logfile b2/build.log golang-filippo-edwards25519_1.0.0~rc1+git20210721-0.1.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 virt32z 6.1.0-30-armmp-lpae #1 SMP Debian 6.1.124-1 (2025-01-12) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/15366/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/6852/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -143,7 +175,7 @@
 Get: 34 http://deb.debian.org/debian trixie/main armhf golang-src all 2:1.23~2 [5088 B]
 Get: 35 http://deb.debian.org/debian trixie/main armhf golang-go armhf 2:1.23~2 [44.3 kB]
 Get: 36 http://deb.debian.org/debian trixie/main armhf golang-any armhf 2:1.23~2 [5172 B]
-Fetched 62.6 MB in 5s (11.6 MB/s)
+Fetched 62.6 MB in 1s (68.9 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 ... 19568 files and directories currently installed.)
@@ -302,7 +334,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-filippo-edwards25519-1.0.0~rc1+git20210721/ && 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-filippo-edwards25519_1.0.0~rc1+git20210721-0.1_source.changes
+I: user script /srv/workspace/pbuilder/6852/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/6852/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-filippo-edwards25519-1.0.0~rc1+git20210721/ && 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-filippo-edwards25519_1.0.0~rc1+git20210721-0.1_source.changes
 dpkg-buildpackage: info: source package golang-filippo-edwards25519
 dpkg-buildpackage: info: source version 1.0.0~rc1+git20210721-0.1
 dpkg-buildpackage: info: source distribution unstable
@@ -320,38 +356,38 @@
    dh_autoreconf -O--builddirectory=_build -O--buildsystem=golang
    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 3 filippo.io/edwards25519 filippo.io/edwards25519/field
-internal/goarch
+	cd _build && go install -trimpath -v -p 4 filippo.io/edwards25519 filippo.io/edwards25519/field
 internal/byteorder
+internal/coverage/rtcov
+internal/goarch
 internal/cpu
 internal/abi
-internal/chacha8rand
-internal/bytealg
-internal/coverage/rtcov
 internal/godebugs
-internal/goos
+internal/chacha8rand
 internal/goexperiment
+internal/goos
 internal/profilerecord
-internal/runtime/atomic
 internal/runtime/syscall
-internal/stringslite
-internal/runtime/exithook
-runtime/internal/math
 runtime/internal/sys
+internal/bytealg
+runtime/internal/math
+internal/runtime/atomic
 internal/unsafeheader
 internal/race
 sync/atomic
+internal/stringslite
 math/bits
-runtime
-math
+internal/runtime/exithook
 internal/itoa
 unicode/utf8
 unicode
+math
+runtime
 cmp
 crypto/subtle
-internal/reflectlite
 sync
 iter
+internal/reflectlite
 slices
 errors
 io
@@ -361,7 +397,7 @@
 filippo.io/edwards25519/field
 filippo.io/edwards25519
    dh_auto_test -O--builddirectory=_build -O--buildsystem=golang
-	cd _build && go test -vet=off -v -p 3 filippo.io/edwards25519 filippo.io/edwards25519/field
+	cd _build && go test -vet=off -v -p 4 filippo.io/edwards25519 filippo.io/edwards25519/field
 === RUN   TestGenerator
 --- PASS: TestGenerator (0.00s)
 === RUN   TestAddSubNegOnBasePoint
@@ -433,25 +469,25 @@
 === RUN   TestMultByCofactor
 --- PASS: TestMultByCofactor (0.11s)
 === RUN   TestScalarInvert
---- PASS: TestScalarInvert (0.87s)
+--- PASS: TestScalarInvert (1.08s)
 === RUN   TestMultiScalarMultMatchesBaseMult
---- PASS: TestMultiScalarMultMatchesBaseMult (10.33s)
+--- PASS: TestMultiScalarMultMatchesBaseMult (13.49s)
 === RUN   TestVarTimeMultiScalarMultMatchesBaseMult
---- PASS: TestVarTimeMultiScalarMultMatchesBaseMult (8.87s)
+--- PASS: TestVarTimeMultiScalarMultMatchesBaseMult (9.82s)
 === RUN   TestScalarAliasing
---- PASS: TestScalarAliasing (0.14s)
+--- PASS: TestScalarAliasing (0.24s)
 === RUN   TestScalarGenerate
---- PASS: TestScalarGenerate (0.20s)
+--- PASS: TestScalarGenerate (0.26s)
 === RUN   TestScalarSetCanonicalBytes
---- PASS: TestScalarSetCanonicalBytes (1.76s)
+--- PASS: TestScalarSetCanonicalBytes (2.45s)
 === RUN   TestScalarSetUniformBytes
---- PASS: TestScalarSetUniformBytes (3.24s)
+--- PASS: TestScalarSetUniformBytes (4.44s)
 === RUN   TestScalarSetBytesWithClamping
 --- PASS: TestScalarSetBytesWithClamping (0.00s)
 === RUN   TestScalarMultiplyDistributesOverAdd
---- PASS: TestScalarMultiplyDistributesOverAdd (0.93s)
+--- PASS: TestScalarMultiplyDistributesOverAdd (2.48s)
 === RUN   TestScalarAddLikeSubNeg
---- PASS: TestScalarAddLikeSubNeg (0.64s)
+--- PASS: TestScalarAddLikeSubNeg (1.25s)
 === RUN   TestScalarNonAdjacentForm
 --- PASS: TestScalarNonAdjacentForm (0.00s)
 === RUN   TestScalarEqual
@@ -465,17 +501,17 @@
 === RUN   TestVarTimeDoubleBaseMultVsDalek
 --- PASS: TestVarTimeDoubleBaseMultVsDalek (0.01s)
 === RUN   TestScalarMultDistributesOverAdd
---- PASS: TestScalarMultDistributesOverAdd (12.60s)
+--- PASS: TestScalarMultDistributesOverAdd (20.28s)
 === RUN   TestScalarMultNonIdentityPoint
---- PASS: TestScalarMultNonIdentityPoint (5.28s)
+--- PASS: TestScalarMultNonIdentityPoint (5.24s)
 === RUN   TestBasepointTableGeneration
 --- PASS: TestBasepointTableGeneration (0.03s)
 === RUN   TestScalarMultMatchesBaseMult
---- PASS: TestScalarMultMatchesBaseMult (5.28s)
+--- PASS: TestScalarMultMatchesBaseMult (5.25s)
 === RUN   TestBasepointNafTableGeneration
 --- PASS: TestBasepointNafTableGeneration (0.01s)
 === RUN   TestVarTimeDoubleBaseMultMatchesBaseMult
---- PASS: TestVarTimeDoubleBaseMultMatchesBaseMult (6.45s)
+--- PASS: TestVarTimeDoubleBaseMultMatchesBaseMult (6.30s)
 === RUN   TestProjLookupTable
 --- PASS: TestProjLookupTable (0.00s)
 === RUN   TestAffineLookupTable
@@ -485,13 +521,13 @@
 === RUN   TestNafLookupTable8
 --- PASS: TestNafLookupTable8 (0.01s)
 PASS
-ok  	filippo.io/edwards25519	56.797s
+ok  	filippo.io/edwards25519	72.792s
 === RUN   TestAliasing
---- PASS: TestAliasing (30.43s)
+--- PASS: TestAliasing (38.65s)
 === RUN   TestSetWideBytes
 --- PASS: TestSetWideBytes (0.00s)
 === RUN   TestMultiplyDistributesOverAdd
---- PASS: TestMultiplyDistributesOverAdd (0.68s)
+--- PASS: TestMultiplyDistributesOverAdd (1.38s)
 === RUN   TestMul64to128
 --- PASS: TestMul64to128 (0.00s)
 === RUN   TestSetBytesRoundTrip
@@ -511,17 +547,17 @@
 === RUN   TestSelectSwap
 --- PASS: TestSelectSwap (0.00s)
 === RUN   TestMult32
---- PASS: TestMult32 (7.71s)
+--- PASS: TestMult32 (13.49s)
 === RUN   TestSqrtRatio
 --- PASS: TestSqrtRatio (0.00s)
 === RUN   TestCarryPropagate
---- PASS: TestCarryPropagate (0.47s)
+--- PASS: TestCarryPropagate (0.84s)
 === RUN   TestFeSquare
---- PASS: TestFeSquare (0.29s)
+--- PASS: TestFeSquare (0.31s)
 === RUN   TestFeMul
---- PASS: TestFeMul (0.44s)
+--- PASS: TestFeMul (0.47s)
 PASS
-ok  	filippo.io/edwards25519/field	40.037s
+ok  	filippo.io/edwards25519/field	55.178s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -548,12 +584,14 @@
 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/6852/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/6852/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/15366 and its subdirectories
-I: Current time: Wed Feb  5 07:34:32 -12 2025
-I: pbuilder-time-stamp: 1738784072
+I: removing directory /srv/workspace/pbuilder/6852 and its subdirectories
+I: Current time: Thu Feb  6 09:37:49 +14 2025
+I: pbuilder-time-stamp: 1738784269