Diff of the two buildlogs:

--
--- b1/build.log	2024-04-26 22:13:10.874546887 +0000
+++ b2/build.log	2024-04-26 22:15:54.827546874 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Apr 26 10:10:33 -12 2024
-I: pbuilder-time-stamp: 1714169433
+I: Current time: Fri May 30 18:36:14 +14 2025
+I: pbuilder-time-stamp: 1748579774
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking golang-pault-go-archive_1.0-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/84697/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4042437/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-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 May 30 04:36 /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/4042437/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4042437/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'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="21" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.21(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=42 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='250e151dc200446eaca1fd8052b3e384'
-  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='84697'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d91542edb5604c8a826b643d4b51157a
+  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=4042437
   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.OOzyFocc/pbuilderrc_HuE5 --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.OOzyFocc/b1 --logfile b1/build.log golang-pault-go-archive_1.0-2.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  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.OOzyFocc/pbuilderrc_C81h --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.OOzyFocc/b2 --logfile b2/build.log golang-pault-go-archive_1.0-2.dsc'
+  SUDO_GID=111
+  SUDO_UID=106
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://213.165.73.152:3128
 I: uname -a
-  Linux ionos11-amd64 6.1.0-20-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.85-1 (2024-04-11) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1 (2024-02-15) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 22 12:43 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/84697/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 27 17:46 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/4042437/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -83,7 +115,7 @@
 Depends: debhelper-compat (= 12), dh-golang, golang-any, golang-golang-x-crypto-dev, golang-pault-go-debian-dev (>= 0.6), golang-pault-go-blobstore-dev
 dpkg-deb: building package 'pbuilder-satisfydepends-dummy' in '/tmp/satisfydepends-aptitude/pbuilder-satisfydepends-dummy.deb'.
 Selecting previously unselected package pbuilder-satisfydepends-dummy.
-(Reading database ... 19897 files and directories currently installed.)
+(Reading database ... 19721 files and directories currently installed.)
 Preparing to unpack .../pbuilder-satisfydepends-dummy.deb ...
 Unpacking pbuilder-satisfydepends-dummy (0.invalid.0) ...
 dpkg: pbuilder-satisfydepends-dummy: dependency problems, but configuring anyway as you requested:
@@ -163,10 +195,10 @@
 Get: 45 http://deb.debian.org/debian trixie/main amd64 golang-pault-go-blobstore-dev all 0.0~git20180314.d6d187c-1.1 [4448 B]
 Get: 46 http://deb.debian.org/debian trixie/main amd64 golang-pault-go-topsort-dev all 0.1.1-1 [4772 B]
 Get: 47 http://deb.debian.org/debian trixie/main amd64 golang-pault-go-debian-dev all 0.16.0-1 [47.4 kB]
-Fetched 103 MB in 2s (47.4 MB/s)
+Fetched 103 MB in 12s (8662 kB/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 ... 19897 files and directories currently installed.)
+(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 ... 19721 files and directories currently installed.)
 Preparing to unpack .../00-sensible-utils_0.0.22_all.deb ...
 Unpacking sensible-utils (0.0.22) ...
 Selecting previously unselected package libmagic-mgc.
@@ -366,7 +398,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-pault-go-archive-1.0/ && 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-pault-go-archive_1.0-2_source.changes
+I: user script /srv/workspace/pbuilder/4042437/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/4042437/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-pault-go-archive-1.0/ && 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-pault-go-archive_1.0-2_source.changes
 dpkg-buildpackage: info: source package golang-pault-go-archive
 dpkg-buildpackage: info: source version 1.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -384,40 +420,40 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-x86_64-linux-gnu && go install -trimpath -v -p 20 pault.ag/go/archive
-internal/goarch
-internal/unsafeheader
+	cd obj-x86_64-linux-gnu && go install -trimpath -v -p 42 pault.ag/go/archive
 internal/coverage/rtcov
-internal/godebugs
-internal/goexperiment
-internal/goos
 unicode/utf8
+internal/godebugs
+internal/nettrace
 internal/race
+math/bits
+vendor/golang.org/x/crypto/cryptobyte/asn1
 crypto/internal/alias
-internal/itoa
-internal/cpu
+vendor/golang.org/x/crypto/internal/alias
+log/internal
+image/color
+internal/goarch
 cmp
+internal/unsafeheader
+unicode
 unicode/utf16
+container/list
+internal/goos
+internal/goexperiment
 runtime/internal/syscall
+encoding
+sync/atomic
+internal/itoa
+crypto/subtle
+internal/cpu
 crypto/internal/boring/sig
+github.com/klauspost/compress/internal/cpuinfo
 runtime/internal/atomic
-math/bits
-crypto/subtle
-unicode
-vendor/golang.org/x/crypto/cryptobyte/asn1
-sync/atomic
-image/color
-internal/nettrace
-log/internal
-container/list
-vendor/golang.org/x/crypto/internal/alias
-internal/abi
-internal/chacha8rand
 runtime/internal/math
-encoding
-github.com/klauspost/compress/internal/cpuinfo
-slices
+internal/chacha8rand
+internal/abi
 runtime/internal/sys
+slices
 internal/bytealg
 math
 runtime
@@ -425,112 +461,112 @@
 internal/reflectlite
 sync
 internal/testlog
-internal/bisect
 internal/singleflight
+internal/bisect
 runtime/cgo
+internal/godebug
 errors
 sort
-internal/godebug
 io
-pault.ag/go/topsort
+strconv
 internal/safefilepath
 internal/intern
 math/rand
 path
+pault.ag/go/topsort
 vendor/golang.org/x/net/dns/dnsmessage
 golang.org/x/crypto/cast5
 internal/oserror
-strconv
 crypto/internal/nistec/fiat
-syscall
+crypto/internal/randutil
 bytes
 hash
-crypto/internal/randutil
 strings
+syscall
 hash/adler32
 hash/crc64
 hash/crc32
-vendor/golang.org/x/text/transform
 crypto
 golang.org/x/crypto/openpgp/errors
-net/netip
 crypto/rc4
+net/netip
 reflect
+golang.org/x/crypto/openpgp/s2k
+vendor/golang.org/x/text/transform
 net/http/internal/ascii
 bufio
-golang.org/x/crypto/openpgp/s2k
 compress/bzip2
 image
-internal/syscall/unix
 internal/syscall/execenv
 time
+internal/syscall/unix
+internal/fmtsort
+encoding/binary
 image/internal/imageutil
 image/jpeg
-internal/poll
-context
-io/fs
-embed
-os
-encoding/binary
-internal/fmtsort
 crypto/md5
 encoding/base64
-crypto/cipher
+vendor/golang.org/x/crypto/internal/poly1305
 github.com/cespare/xxhash
 github.com/klauspost/compress/internal/snapref
+crypto/cipher
 crypto/internal/edwards25519/field
-vendor/golang.org/x/crypto/internal/poly1305
-crypto/internal/nistec
-golang.org/x/crypto/openpgp/armor
 encoding/pem
-crypto/internal/boring
+golang.org/x/crypto/openpgp/armor
 crypto/des
 vendor/golang.org/x/crypto/chacha20
+crypto/internal/boring
+crypto/internal/edwards25519
 crypto/sha1
 crypto/sha256
 crypto/sha512
 crypto/aes
 crypto/hmac
-crypto/internal/edwards25519
-io/ioutil
+vendor/golang.org/x/crypto/hkdf
+github.com/xi2/xz
+internal/poll
+io/fs
+context
+embed
+crypto/internal/nistec
+os
+crypto/ecdh
 fmt
+io/ioutil
 path/filepath
 pault.ag/go/debian/internal
 vendor/golang.org/x/sys/cpu
-vendor/golang.org/x/crypto/hkdf
 net
 vendor/golang.org/x/crypto/chacha20poly1305
-github.com/xi2/xz
-crypto/ecdh
-log
 encoding/hex
+log
 net/url
-vendor/golang.org/x/net/http2/hpack
-mime/quotedprintable
-compress/flate
-net/http/internal
-pault.ag/go/blobstore
 mime
-os/user
-math/big
+compress/flate
 github.com/kjk/lzma
 github.com/klauspost/compress/fse
+net/http/internal
+mime/quotedprintable
 runtime/debug
+pault.ag/go/blobstore
+os/user
+vendor/golang.org/x/net/http2/hpack
 encoding/json
+math/big
 vendor/golang.org/x/text/unicode/norm
 vendor/golang.org/x/text/unicode/bidi
 github.com/klauspost/compress/huff0
-vendor/golang.org/x/text/secure/bidirule
-compress/zlib
 compress/gzip
+compress/zlib
 pault.ag/go/debian/hashio
+vendor/golang.org/x/text/secure/bidirule
 vendor/golang.org/x/net/idna
 pault.ag/go/debian/version
 pault.ag/go/debian/dependency
 crypto/internal/boring/bbig
+crypto/rand
 crypto/internal/bigmod
 crypto/dsa
-crypto/rand
 crypto/elliptic
 encoding/asn1
 golang.org/x/crypto/openpgp/elgamal
@@ -539,10 +575,10 @@
 crypto/rsa
 crypto/x509/pkix
 vendor/golang.org/x/crypto/cryptobyte
+archive/tar
 crypto/ecdsa
 golang.org/x/crypto/openpgp/packet
 golang.org/x/crypto/openpgp
-archive/tar
 vendor/golang.org/x/net/http/httpproxy
 net/textproto
 crypto/x509
@@ -556,7 +592,7 @@
 net/http
 pault.ag/go/archive
    dh_auto_test -O--buildsystem=golang
-	cd obj-x86_64-linux-gnu && go test -vet=off -v -p 20 pault.ag/go/archive
+	cd obj-x86_64-linux-gnu && go test -vet=off -v -p 42 pault.ag/go/archive
 ?   	pault.ag/go/archive	[no test files]
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
@@ -585,12 +621,14 @@
 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/4042437/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4042437/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/84697 and its subdirectories
-I: Current time: Fri Apr 26 10:13:10 -12 2024
-I: pbuilder-time-stamp: 1714169590
+I: removing directory /srv/workspace/pbuilder/4042437 and its subdirectories
+I: Current time: Fri May 30 18:38:53 +14 2025
+I: pbuilder-time-stamp: 1748579933