Diff of the two buildlogs:

--
--- b1/build.log	2025-07-24 06:20:31.788730460 +0000
+++ b2/build.log	2025-07-24 06:21:18.344790019 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Aug 26 00:41:14 -12 2026
-I: pbuilder-time-stamp: 1787748074
+I: Current time: Thu Jul 24 20:20:33 +14 2025
+I: pbuilder-time-stamp: 1753338033
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/experimental-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: applying 0001-Skip-tests-that-require-internet-access.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3965302/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1994269/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos1-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 Jul 24 06:20 /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/1994269/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1994269/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=42 '
-  DISTRIBUTION='experimental'
-  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]="37" [3]="1" [4]="release" [5]="x86_64-pc-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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=40 '
+  DIRSTACK=()
+  DISTRIBUTION=experimental
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='e2a9a5baab224ea089399ec72e2f6e15'
-  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='3965302'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d1b8e9dce67143cfa1ee490746e54a72
+  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=1994269
   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.ihxHCRsw/pbuilderrc_FBjr --distribution experimental --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/experimental-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.ihxHCRsw/b1 --logfile b1/build.log golang-bugst-downloader_2.2.0-1.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.ihxHCRsw/pbuilderrc_jR3K --distribution experimental --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/experimental-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.ihxHCRsw/b2 --logfile b2/build.log golang-bugst-downloader_2.2.0-1.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos5-amd64 6.12.33+deb12-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.33-1~bpo12+1 (2025-07-09) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-37-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.140-1 (2025-05-22) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 12  2025 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3965302/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 12 19:25 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1994269/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -151,7 +183,7 @@
 Get: 38 http://deb.debian.org/debian unstable/main amd64 golang-github-stretchr-objx-dev all 0.5.2-1 [25.5 kB]
 Get: 39 http://deb.debian.org/debian unstable/main amd64 golang-gopkg-yaml.v3-dev all 3.0.1-3 [74.3 kB]
 Get: 40 http://deb.debian.org/debian unstable/main amd64 golang-github-stretchr-testify-dev all 1.10.0-1 [78.4 kB]
-Fetched 61.4 MB in 8s (7440 kB/s)
+Fetched 61.4 MB in 3s (19.7 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 ... 19849 files and directories currently installed.)
@@ -326,7 +358,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-bugst-downloader-2.2.0/ && 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-bugst-downloader_2.2.0-1_source.changes
+I: user script /srv/workspace/pbuilder/1994269/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for experimental
+I: user script /srv/workspace/pbuilder/1994269/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-bugst-downloader-2.2.0/ && 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-bugst-downloader_2.2.0-1_source.changes
 dpkg-buildpackage: info: source package golang-bugst-downloader
 dpkg-buildpackage: info: source version 2.2.0-1
 dpkg-buildpackage: info: source distribution experimental
@@ -344,160 +380,160 @@
    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 42 go.bug.st/downloader
+	cd _build && go install -trimpath -v -p 40 go.bug.st/downloader
 unicode/utf16
-internal/goarch
-internal/unsafeheader
-internal/asan
-internal/coverage/rtcov
+internal/goos
+internal/itoa
+log/internal
 cmp
-internal/msan
+internal/unsafeheader
+vendor/golang.org/x/crypto/internal/alias
+crypto/internal/fips140/alias
 internal/godebugs
-container/list
 internal/byteorder
-unicode/utf8
-vendor/golang.org/x/crypto/internal/alias
-log/internal
+internal/nettrace
+internal/coverage/rtcov
 internal/profilerecord
-internal/itoa
 vendor/golang.org/x/crypto/cryptobyte/asn1
-crypto/internal/boring/sig
+container/list
+unicode/utf8
+math/bits
+internal/msan
+internal/asan
 sync/atomic
-crypto/internal/fips140/alias
-internal/nettrace
+internal/runtime/syscall
+crypto/internal/boring/sig
 internal/runtime/atomic
-unicode
-math/bits
-internal/goos
 internal/cpu
-internal/runtime/syscall
+internal/goarch
+unicode
 internal/goexperiment
-internal/runtime/math
-internal/abi
 crypto/internal/fips140/subtle
+internal/runtime/math
 internal/runtime/sys
+internal/abi
 crypto/internal/fips140deps/byteorder
 internal/chacha8rand
 crypto/internal/fips140deps/cpu
-internal/runtime/exithook
 internal/bytealg
 math
+internal/runtime/exithook
+internal/stringslite
 internal/race
 internal/sync
 internal/runtime/maps
-internal/stringslite
 runtime
+crypto/subtle
 iter
-internal/reflectlite
 weak
-crypto/subtle
+internal/reflectlite
 sync
 maps
 slices
-internal/singleflight
+errors
+sort
 internal/testlog
+internal/singleflight
 internal/bisect
 unique
 runtime/cgo
-internal/godebug
-errors
-sort
 internal/oserror
-crypto/internal/fips140deps/godebug
-math/rand
-io
-strconv
 path
-bytes
-math/rand/v2
-reflect
-net/netip
+io
 vendor/golang.org/x/net/dns/dnsmessage
+math/rand/v2
+strconv
+internal/godebug
 hash
+bytes
+crypto/internal/randutil
+crypto/internal/fips140deps/godebug
 strings
+net/netip
+math/rand
+reflect
 syscall
-hash/crc32
-crypto
-crypto/internal/randutil
-vendor/golang.org/x/text/transform
+net/http/internal/ascii
 crypto/internal/impl
+vendor/golang.org/x/text/transform
+crypto
 bufio
+hash/crc32
 crypto/internal/fips140
-net/http/internal/ascii
-crypto/internal/fips140/sha3
-crypto/internal/fips140/sha256
 crypto/tls/internal/fips140tls
+crypto/internal/fips140/sha256
 crypto/internal/fips140/sha512
-crypto/sha3
-crypto/internal/fips140/hmac
+crypto/internal/fips140/sha3
 internal/syscall/execenv
 internal/syscall/unix
 time
-internal/fmtsort
-encoding/binary
-crypto/internal/fips140hash
-crypto/internal/fips140/check
+crypto/sha3
+crypto/internal/fips140/hmac
 context
 io/fs
 internal/poll
-crypto/internal/fips140/hkdf
+crypto/internal/fips140/check
+crypto/internal/fips140hash
+internal/fmtsort
+encoding/binary
 crypto/internal/fips140/tls12
 crypto/internal/fips140/edwards25519/field
 crypto/internal/fips140/bigmod
+crypto/internal/fips140/hkdf
 crypto/internal/fips140/aes
 crypto/internal/fips140/nistec/fiat
 crypto/internal/fips140/tls13
 internal/filepathlite
+os
 crypto/internal/fips140/edwards25519
 encoding/base64
 vendor/golang.org/x/crypto/internal/poly1305
 crypto/internal/fips140/nistec
-os
 encoding/pem
+path/filepath
 crypto/internal/sysrand
-fmt
 vendor/golang.org/x/sys/cpu
-path/filepath
+fmt
 crypto/internal/entropy
 crypto/internal/fips140/drbg
 crypto/internal/fips140only
-crypto/internal/fips140/aes/gcm
-crypto/internal/fips140/rsa
 crypto/internal/fips140/ed25519
+crypto/internal/fips140/rsa
+crypto/internal/fips140/aes/gcm
 crypto/internal/fips140/mlkem
-crypto/rc4
 crypto/md5
-crypto/cipher
+crypto/rc4
 crypto/internal/fips140/ecdh
 crypto/internal/fips140/ecdsa
 encoding/hex
-log
 net/url
-compress/flate
-vendor/golang.org/x/net/http2/hpack
-mime
+log
 mime/quotedprintable
 net/http/internal
+vendor/golang.org/x/net/http2/hpack
+mime
+compress/flate
 vendor/golang.org/x/text/unicode/norm
 math/big
+crypto/cipher
+vendor/golang.org/x/text/unicode/bidi
+crypto/des
 crypto/internal/boring
 vendor/golang.org/x/crypto/chacha20
-crypto/des
-vendor/golang.org/x/text/unicode/bidi
-crypto/hmac
-crypto/sha256
-crypto/ecdh
 crypto/aes
 crypto/sha512
+crypto/ecdh
+crypto/hmac
+crypto/sha256
 crypto/sha1
 vendor/golang.org/x/crypto/chacha20poly1305
-vendor/golang.org/x/text/secure/bidirule
 compress/gzip
+vendor/golang.org/x/text/secure/bidirule
 vendor/golang.org/x/net/idna
-crypto/rand
 crypto/internal/boring/bbig
-crypto/elliptic
+crypto/rand
 crypto/dsa
+crypto/elliptic
 encoding/asn1
 crypto/ed25519
 crypto/internal/hpke
@@ -546,12 +582,14 @@
 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/1994269/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1994269/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/3965302 and its subdirectories
-I: Current time: Wed Aug 26 00:43:30 -12 2026
-I: pbuilder-time-stamp: 1787748210
+I: removing directory /srv/workspace/pbuilder/1994269 and its subdirectories
+I: Current time: Thu Jul 24 20:21:17 +14 2025
+I: pbuilder-time-stamp: 1753338077