Diff of the two buildlogs:

--
--- b1/build.log	2025-01-26 22:28:14.533370671 +0000
+++ b2/build.log	2025-01-26 22:30:43.774636897 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Feb 28 16:50:03 -12 2026
-I: pbuilder-time-stamp: 1772340603
+I: Current time: Mon Jan 27 12:28:17 +14 2025
+I: pbuilder-time-stamp: 1737930497
 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: applying 0002-Revert-alecthomas-kingpin-import-path.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1605652/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3414289/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-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 Jan 26 22:28 /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/3414289/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3414289/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='ddee8a36034b4b05bd50897233f21864'
-  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='1605652'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=4083a1abc68b440fa12e1d34ed9aec07
+  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=3414289
   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.I1EHKNsT/pbuilderrc_DxEQ --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.I1EHKNsT/b1 --logfile b1/build.log prometheus-smokeping-prober_0.9.0-1.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.I1EHKNsT/pbuilderrc_4nv8 --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.I1EHKNsT/b2 --logfile b2/build.log prometheus-smokeping-prober_0.9.0-1.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 codethink03-arm64 6.1.0-30-cloud-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-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  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1605652/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3414289/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -207,7 +239,7 @@
 Get: 79 http://deb.debian.org/debian trixie/main arm64 golang-github-prometheus-community-pro-bing-dev all 0.6.0-1 [20.3 kB]
 Get: 80 http://deb.debian.org/debian trixie/main arm64 golang-github-prometheus-exporter-toolkit-dev all 0.13.1-1 [34.1 kB]
 Get: 81 http://deb.debian.org/debian trixie/main arm64 golang-uber-automaxprocs-dev all 1.5.3-1 [22.3 kB]
-Fetched 119 MB in 1s (217 MB/s)
+Fetched 119 MB in 1s (131 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 ... 19970 files and directories currently installed.)
@@ -546,7 +578,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/prometheus-smokeping-prober-0.9.0/ && 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  > ../prometheus-smokeping-prober_0.9.0-1_source.changes
+I: user script /srv/workspace/pbuilder/3414289/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3414289/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/prometheus-smokeping-prober-0.9.0/ && 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  > ../prometheus-smokeping-prober_0.9.0-1_source.changes
 dpkg-buildpackage: info: source package prometheus-smokeping-prober
 dpkg-buildpackage: info: source version 0.9.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -567,50 +603,50 @@
 make[1]: Entering directory '/build/reproducible-path/prometheus-smokeping-prober-0.9.0'
 dh_auto_build -- -ldflags " -X github.com/prometheus/common/version.Version=0.9.0 -X github.com/prometheus/common/version.Revision=0.9.0-1 -X github.com/prometheus/common/version.Branch=debian/sid -X github.com/prometheus/common/version.BuildUser=team+pkg-go@tracker.debian.org -X github.com/prometheus/common/version.BuildDate=20250122-12:41:12 -X github.com/prometheus/common/version.GoVersion=go1.23.5"
 	cd _build && go install -trimpath -v -p 12 -ldflags " -X github.com/prometheus/common/version.Version=0.9.0 -X github.com/prometheus/common/version.Revision=0.9.0-1 -X github.com/prometheus/common/version.Branch=debian/sid -X github.com/prometheus/common/version.BuildUser=team+pkg-go@tracker.debian.org -X github.com/prometheus/common/version.BuildDate=20250122-12:41:12 -X github.com/prometheus/common/version.GoVersion=go1.23.5" github.com/superq/smokeping_prober github.com/superq/smokeping_prober/config
-internal/godebugs
-internal/goexperiment
-internal/coverage/rtcov
+internal/itoa
 internal/goarch
-internal/profilerecord
 internal/byteorder
-cmp
-internal/itoa
-internal/goos
+internal/coverage/rtcov
+internal/godebugs
 internal/unsafeheader
-runtime/internal/math
-internal/race
 internal/cpu
-internal/abi
+internal/goexperiment
+cmp
+internal/race
 math/bits
 unicode/utf8
 internal/runtime/syscall
+internal/goos
 sync/atomic
-unicode
+internal/abi
+internal/profilerecord
+runtime/internal/math
+runtime/internal/sys
 internal/chacha8rand
+unicode
 internal/asan
-runtime/internal/sys
 internal/msan
 container/list
 crypto/internal/alias
-crypto/internal/boring/sig
 math
-unicode/utf16
 crypto/subtle
+crypto/internal/boring/sig
+unicode/utf16
 vendor/golang.org/x/crypto/cryptobyte/asn1
 vendor/golang.org/x/crypto/internal/alias
+internal/bytealg
+internal/runtime/atomic
 internal/nettrace
 encoding
 golang.org/x/net/internal/iana
 log/internal
 google.golang.org/protobuf/internal/flags
-internal/bytealg
-internal/runtime/atomic
 google.golang.org/protobuf/internal/set
 log/slog/internal
-internal/stringslite
 internal/runtime/exithook
-runtime
+internal/stringslite
 github.com/klauspost/compress
+runtime
 internal/reflectlite
 iter
 sync
@@ -620,40 +656,40 @@
 maps
 internal/bisect
 internal/testlog
-internal/singleflight
 google.golang.org/protobuf/internal/pragma
 log/slog/internal/buffer
+internal/singleflight
 runtime/cgo
 internal/godebug
 errors
 sort
-internal/oserror
+math/rand
 strconv
+github.com/beorn7/perks/quantile
 math/rand/v2
-crypto/internal/nistec/fiat
-io
-path
 crypto/internal/edwards25519/field
+internal/oserror
+io
 vendor/golang.org/x/net/dns/dnsmessage
-syscall
-math/rand
+crypto/internal/nistec/fiat
+path
 reflect
+syscall
+crypto/rc4
 bytes
-crypto/internal/edwards25519
 hash
-crypto/rc4
 crypto/internal/randutil
-internal/concurrent
 strings
+internal/concurrent
+crypto/internal/edwards25519
+golang.org/x/crypto/blowfish
 crypto
-unique
 hash/crc32
-github.com/beorn7/perks/quantile
-hash/fnv
+unique
 crypto/md5
-golang.org/x/crypto/blowfish
-crypto/cipher
+hash/fnv
 net/netip
+crypto/cipher
 vendor/golang.org/x/text/transform
 golang.org/x/text/transform
 bufio
@@ -663,9 +699,6 @@
 html
 crypto/internal/boring
 crypto/des
-time
-internal/syscall/unix
-internal/syscall/execenv
 crypto/aes
 crypto/sha512
 crypto/hmac
@@ -673,127 +706,130 @@
 crypto/sha256
 vendor/golang.org/x/crypto/hkdf
 regexp
+time
+internal/syscall/execenv
+internal/syscall/unix
 io/fs
-internal/poll
 context
+internal/poll
 github.com/jpillora/backoff
+internal/fmtsort
+encoding/binary
 internal/filepathlite
 embed
+os
 crypto/internal/nistec
 google.golang.org/protobuf/internal/editiondefaults
-internal/fmtsort
-encoding/binary
-os
 vendor/golang.org/x/crypto/chacha20
-github.com/klauspost/compress/internal/snapref
 vendor/golang.org/x/crypto/internal/poly1305
-golang.org/x/sys/unix
 encoding/base64
+golang.org/x/sys/unix
 github.com/cespare/xxhash
-crypto/ecdh
+github.com/klauspost/compress/internal/snapref
 encoding/pem
 vendor/golang.org/x/crypto/chacha20poly1305
+crypto/ecdh
 fmt
-path/filepath
 vendor/golang.org/x/sys/cpu
-google.golang.org/protobuf/internal/detrand
+path/filepath
 internal/lazyregexp
 github.com/prometheus/procfs/internal/util
-io/ioutil
+google.golang.org/protobuf/internal/detrand
 os/signal
+io/ioutil
 net
 vendor/golang.org/x/crypto/sha3
 math/big
 encoding/hex
 net/url
 database/sql/driver
-golang.org/x/sync/errgroup
-golang.org/x/net/bpf
 encoding/json
+golang.org/x/net/bpf
+golang.org/x/sync/errgroup
 log
 compress/flate
 vendor/golang.org/x/text/unicode/norm
 vendor/golang.org/x/net/http2/hpack
 mime
+vendor/golang.org/x/text/unicode/bidi
 mime/quotedprintable
 net/http/internal
-vendor/golang.org/x/text/unicode/bidi
 google.golang.org/protobuf/internal/errors
 go/token
 google.golang.org/protobuf/internal/version
 github.com/prometheus/procfs/internal/fs
-compress/gzip
+google.golang.org/protobuf/encoding/protowire
 runtime/debug
 text/template/parse
+compress/gzip
+google.golang.org/protobuf/reflect/protoreflect
 github.com/klauspost/compress/fse
-google.golang.org/protobuf/encoding/protowire
 github.com/alecthomas/units
 go/scanner
-google.golang.org/protobuf/reflect/protoreflect
-vendor/golang.org/x/text/secure/bidirule
 go/doc/comment
 github.com/go-logfmt/logfmt
+github.com/mdlayher/socket
+vendor/golang.org/x/text/secure/bidirule
 github.com/klauspost/compress/huff0
 golang.org/x/net/internal/timeseries
-go/ast
 vendor/golang.org/x/net/idna
-text/tabwriter
-golang.org/x/text/unicode/bidi
-golang.org/x/text/unicode/norm
-golang.org/x/net/http2/hpack
-text/template
-github.com/mdlayher/socket
+go/ast
 google.golang.org/protobuf/internal/descfmt
 google.golang.org/protobuf/internal/descopts
 google.golang.org/protobuf/internal/strs
 google.golang.org/protobuf/internal/encoding/messageset
 google.golang.org/protobuf/internal/genid
 google.golang.org/protobuf/internal/order
-google.golang.org/protobuf/internal/encoding/text
 google.golang.org/protobuf/runtime/protoiface
+google.golang.org/protobuf/internal/encoding/text
+text/template
+text/tabwriter
+golang.org/x/text/unicode/bidi
+google.golang.org/protobuf/reflect/protoregistry
+golang.org/x/text/unicode/norm
+log/slog
+github.com/go-kit/log
+golang.org/x/net/http2/hpack
+google.golang.org/protobuf/proto
+gopkg.in/yaml.v2
+google.golang.org/protobuf/internal/encoding/defval
+golang.org/x/text/secure/bidirule
+go.uber.org/automaxprocs/internal/cgroups
+internal/profile
+runtime/pprof
+runtime/trace
 crypto/elliptic
 crypto/internal/bigmod
 crypto/internal/boring/bbig
 encoding/asn1
 crypto/rand
 crypto/dsa
-google.golang.org/protobuf/reflect/protoregistry
-log/slog
+google.golang.org/protobuf/internal/filedesc
+google.golang.org/protobuf/encoding/prototext
+google.golang.org/protobuf/encoding/protodelim
+github.com/prometheus/common/version
 crypto/ed25519
 crypto/internal/hpke
 crypto/internal/mlkem768
 crypto/rsa
-google.golang.org/protobuf/internal/encoding/defval
 github.com/klauspost/compress/zstd
-google.golang.org/protobuf/proto
+github.com/prometheus/common/promslog
 go/doc
-github.com/go-kit/log
-golang.org/x/text/secure/bidirule
-gopkg.in/yaml.v2
+html/template
+golang.org/x/crypto/bcrypt
 vendor/golang.org/x/crypto/cryptobyte
 crypto/x509/pkix
-golang.org/x/crypto/bcrypt
-go.uber.org/automaxprocs/internal/cgroups
-golang.org/x/net/idna
-github.com/prometheus/common/version
-html/template
-internal/profile
-runtime/pprof
-github.com/prometheus/common/promslog
 go.uber.org/automaxprocs/internal/runtime
-crypto/ecdsa
-google.golang.org/protobuf/internal/filedesc
-google.golang.org/protobuf/encoding/prototext
-google.golang.org/protobuf/encoding/protodelim
+golang.org/x/net/idna
 go.uber.org/automaxprocs/maxprocs
-runtime/trace
+crypto/ecdsa
 google.golang.org/protobuf/internal/encoding/tag
 google.golang.org/protobuf/internal/impl
 crypto/x509
 github.com/google/uuid
+golang.org/x/net/internal/socket
 net/textproto
 vendor/golang.org/x/net/http/httpproxy
-golang.org/x/net/internal/socket
 github.com/prometheus/procfs
 gopkg.in/alecthomas/kingpin.v2
 github.com/mdlayher/vsock
@@ -808,21 +844,21 @@
 google.golang.org/protobuf/types/known/timestamppb
 github.com/prometheus/client_model/go
 golang.org/x/net/icmp
+github.com/prometheus/common/model
 crypto/tls
 github.com/prometheus/common/promslog/flag
-github.com/prometheus/common/model
 github.com/prometheus/client_golang/prometheus/internal
 net/http/httptrace
 github.com/coreos/go-systemd/activation
 net/http
 github.com/prometheus-community/pro-bing
-github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil/header
-github.com/prometheus/common/expfmt
-golang.org/x/net/trace
 expvar
-golang.org/x/net/http2
-net/http/pprof
 golang.org/x/oauth2/internal
+net/http/pprof
+github.com/prometheus/common/expfmt
+golang.org/x/net/http2
+github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil/header
+golang.org/x/net/trace
 github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil
 golang.org/x/oauth2
 golang.org/x/oauth2/clientcredentials
@@ -893,8 +929,8 @@
 dpkg-gencontrol: warning: package prometheus-smokeping-prober: substitution variable ${misc:Static-Built-Using} unused, but is defined
    dh_md5sums -O--builddir=_build -O--buildsystem=golang
    dh_builddeb -O--builddir=_build -O--buildsystem=golang
-dpkg-deb: building package 'prometheus-smokeping-prober' in '../prometheus-smokeping-prober_0.9.0-1_arm64.deb'.
 dpkg-deb: building package 'prometheus-smokeping-prober-dbgsym' in '../prometheus-smokeping-prober-dbgsym_0.9.0-1_arm64.deb'.
+dpkg-deb: building package 'prometheus-smokeping-prober' in '../prometheus-smokeping-prober_0.9.0-1_arm64.deb'.
  dpkg-genbuildinfo --build=binary -O../prometheus-smokeping-prober_0.9.0-1_arm64.buildinfo
  dpkg-genchanges --build=binary -O../prometheus-smokeping-prober_0.9.0-1_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -902,12 +938,14 @@
 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/3414289/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3414289/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/1605652 and its subdirectories
-I: Current time: Sat Feb 28 16:51:12 -12 2026
-I: pbuilder-time-stamp: 1772340672
+I: removing directory /srv/workspace/pbuilder/3414289 and its subdirectories
+I: Current time: Mon Jan 27 12:30:42 +14 2025
+I: pbuilder-time-stamp: 1737930642