Diff of the two buildlogs:

--
--- b1/build.log	2023-04-15 03:01:51.100554663 +0000
+++ b2/build.log	2023-04-15 03:04:29.909502908 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Apr 14 14:59:09 -12 2023
-I: pbuilder-time-stamp: 1681527549
+I: Current time: Fri May 17 23:24:54 +14 2024
+I: pbuilder-time-stamp: 1715937894
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./golang-github-docker-spdystream_0.2.0.orig.tar.gz]
 I: copying [./golang-github-docker-spdystream_0.2.0-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Sat Jan 30 03:44:57 2021 -12
+gpgv: Signature made Sun Jan 31 05:44:57 2021 +14
 gpgv:                using EDDSA key E25DCF798D442B8EDF47814DC4854A3818E0B016
 gpgv:                issuer "zhsj@debian.org"
 gpgv: Can't check signature: No public key
@@ -26,11 +26,20 @@
 dpkg-source: info: unpacking golang-github-docker-spdystream_0.2.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/19533/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/7846/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink11-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
+lrwxrwxrwx 1 root root 4 Jan  6  2023 /bin/sh -> dash
+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/7846/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/7846/tmp/hooks/D02_print_environment starting
 I: set
   BUILDDIR='/build'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
+  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=8'
@@ -40,38 +49,38 @@
   IFS=' 	
   '
   LANG='C'
-  LANGUAGE='en_US:en'
+  LANGUAGE='nl_BE:nl'
   LC_ALL='C'
   MAIL='/var/mail/root'
   OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
+  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'
-  PPID='19533'
+  PPID='7846'
   PS1='# '
   PS2='> '
   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.d8DdVCY7/pbuilderrc_ppB2 --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.d8DdVCY7/b1 --logfile b1/build.log golang-github-docker-spdystream_0.2.0-1.dsc'
+  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.d8DdVCY7/pbuilderrc_Gg3u --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.d8DdVCY7/b2 --logfile b2/build.log --extrapackages usrmerge golang-github-docker-spdystream_0.2.0-1.dsc'
   SUDO_GID='117'
   SUDO_UID='110'
   SUDO_USER='jenkins'
   TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
+  TZ='/usr/share/zoneinfo/Etc/GMT-14'
   USER='root'
   USERNAME='root'
   _='/usr/bin/systemd-run'
   http_proxy='http://192.168.101.16:3128'
 I: uname -a
-  Linux codethink10-arm64 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-208-generic #220-Ubuntu SMP Mon Mar 20 14:28:12 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 14 00:48 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/19533/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 16 07:13 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/7846/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -147,7 +156,7 @@
 Get: 34 http://deb.debian.org/debian bookworm/main arm64 golang-src all 2:1.19~1 [5756 B]
 Get: 35 http://deb.debian.org/debian bookworm/main arm64 golang-go arm64 2:1.19~1 [45.0 kB]
 Get: 36 http://deb.debian.org/debian bookworm/main arm64 golang-any arm64 2:1.19~1 [5876 B]
-Fetched 93.3 MB in 2s (51.4 MB/s)
+Fetched 93.3 MB in 2s (53.9 MB/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 ... 19616 files and directories currently installed.)
@@ -305,8 +314,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/golang-github-docker-spdystream-0.2.0/ && 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-github-docker-spdystream_0.2.0-1_source.changes
+I: user script /srv/workspace/pbuilder/7846/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/7846/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/golang-github-docker-spdystream-0.2.0/ && 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-github-docker-spdystream_0.2.0-1_source.changes
 dpkg-buildpackage: info: source package golang-github-docker-spdystream
 dpkg-buildpackage: info: source version 0.2.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -325,12 +343,12 @@
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
 	cd obj-aarch64-linux-gnu && go install -trimpath -v -p 8 github.com/moby/spdystream github.com/moby/spdystream/spdy
-internal/unsafeheader
 internal/goarch
+internal/unsafeheader
 internal/goexperiment
 internal/goos
-internal/itoa
 math/bits
+internal/itoa
 internal/cpu
 unicode/utf8
 internal/abi
@@ -339,48 +357,48 @@
 runtime/internal/sys
 internal/race
 sync/atomic
-container/list
 unicode
+container/list
 crypto/internal/subtle
 crypto/subtle
-crypto/internal/boring/sig
 math
-unicode/utf16
-vendor/golang.org/x/crypto/cryptobyte/asn1
 internal/bytealg
 runtime/internal/atomic
+crypto/internal/boring/sig
+unicode/utf16
+vendor/golang.org/x/crypto/cryptobyte/asn1
 internal/nettrace
 vendor/golang.org/x/crypto/internal/subtle
 runtime
-sync
 internal/reflectlite
+sync
 internal/testlog
 math/rand
 internal/singleflight
 runtime/cgo
-sort
 errors
+sort
 io
 internal/oserror
 internal/safefilepath
 path
-crypto/internal/nistec/fiat
 strconv
-vendor/golang.org/x/net/dns/dnsmessage
+crypto/internal/nistec/fiat
 syscall
+vendor/golang.org/x/net/dns/dnsmessage
 container/heap
+bytes
 strings
 hash
-bytes
 hash/adler32
 hash/crc32
 crypto/internal/randutil
+vendor/golang.org/x/text/transform
 crypto
 reflect
 crypto/rc4
-net/http/internal/ascii
 bufio
-vendor/golang.org/x/text/transform
+net/http/internal/ascii
 time
 internal/syscall/execenv
 internal/syscall/unix
@@ -388,55 +406,55 @@
 context
 io/fs
 embed
-os
 internal/fmtsort
 encoding/binary
+os
 crypto/cipher
 crypto/internal/edwards25519/field
-crypto/md5
+vendor/golang.org/x/crypto/curve25519/internal/field
 encoding/base64
+crypto/md5
 vendor/golang.org/x/crypto/internal/poly1305
-vendor/golang.org/x/crypto/curve25519/internal/field
 crypto/internal/nistec
 encoding/pem
+crypto/internal/edwards25519
 crypto/internal/boring
 crypto/des
 vendor/golang.org/x/crypto/chacha20
-crypto/internal/edwards25519
-fmt
-internal/godebug
-path/filepath
-internal/intern
-crypto/aes
 crypto/sha512
 crypto/hmac
+crypto/aes
 crypto/sha1
 crypto/sha256
-net/netip
+fmt
+internal/godebug
+path/filepath
+internal/intern
 vendor/golang.org/x/crypto/chacha20poly1305
 vendor/golang.org/x/crypto/hkdf
-compress/flate
-vendor/golang.org/x/text/unicode/norm
+net/netip
+net
 encoding/hex
+net/url
+compress/flate
 vendor/golang.org/x/crypto/curve25519
-log
 math/big
-net/url
-net
+log
+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
-compress/gzip
 compress/zlib
+compress/gzip
 vendor/golang.org/x/text/secure/bidirule
 vendor/golang.org/x/net/idna
 crypto/rand
+crypto/elliptic
 crypto/internal/boring/bbig
 encoding/asn1
 crypto/dsa
-crypto/elliptic
 crypto/ed25519
 crypto/rsa
 vendor/golang.org/x/crypto/cryptobyte
@@ -461,17 +479,17 @@
 === RUN   TestPriorityQueueBlocking
 --- PASS: TestPriorityQueueBlocking (0.00s)
 === RUN   TestSpdyStreams
---- PASS: TestSpdyStreams (0.01s)
+--- PASS: TestSpdyStreams (0.02s)
 === RUN   TestPing
---- PASS: TestPing (0.02s)
+--- PASS: TestPing (0.00s)
 === RUN   TestHalfClose
 --- PASS: TestHalfClose (0.02s)
 === RUN   TestUnexpectedRemoteConnectionClosed
---- PASS: TestUnexpectedRemoteConnectionClosed (0.04s)
+--- PASS: TestUnexpectedRemoteConnectionClosed (0.03s)
 === RUN   TestCloseNotification
 --- PASS: TestCloseNotification (0.00s)
 === RUN   TestIdleShutdownRace
---- PASS: TestIdleShutdownRace (0.02s)
+--- PASS: TestIdleShutdownRace (0.01s)
 === RUN   TestIdleNoTimeoutSet
 --- PASS: TestIdleNoTimeoutSet (0.01s)
 === RUN   TestIdleClearTimeout
@@ -479,7 +497,7 @@
 === RUN   TestIdleNoData
 --- PASS: TestIdleNoData (0.01s)
 === RUN   TestIdleWithData
---- PASS: TestIdleWithData (0.12s)
+--- PASS: TestIdleWithData (0.14s)
 === RUN   TestIdleRace
 --- PASS: TestIdleRace (0.02s)
 === RUN   TestHalfClosedIdleTimeout
@@ -489,17 +507,17 @@
 === RUN   TestStreamResetWithDataRemaining
 --- PASS: TestStreamResetWithDataRemaining (0.00s)
 === RUN   TestFramingAfterRemoteConnectionClosed
---- PASS: TestFramingAfterRemoteConnectionClosed (0.01s)
+--- PASS: TestFramingAfterRemoteConnectionClosed (0.02s)
 === RUN   TestGoAwayRace
 --- PASS: TestGoAwayRace (0.00s)
 === RUN   TestSetIdleTimeoutAfterRemoteConnectionClosed
---- PASS: TestSetIdleTimeoutAfterRemoteConnectionClosed (0.00s)
+--- PASS: TestSetIdleTimeoutAfterRemoteConnectionClosed (0.01s)
 === RUN   TestClientConnectionStopsServingAfterGoAway
 --- PASS: TestClientConnectionStopsServingAfterGoAway (0.01s)
 === RUN   TestStreamReadUnblocksAfterCloseThenReset
 --- PASS: TestStreamReadUnblocksAfterCloseThenReset (0.00s)
 PASS
-ok  	github.com/moby/spdystream	0.371s
+ok  	github.com/moby/spdystream	0.390s
 === RUN   TestHeaderParsing
 --- PASS: TestHeaderParsing (0.00s)
 === RUN   TestCreateParseSynStreamFrameCompressionDisable
@@ -527,16 +545,16 @@
 === RUN   TestCreateParseDataFrame
 --- PASS: TestCreateParseDataFrame (0.00s)
 === RUN   TestCompressionContextAcrossFrames
---- PASS: TestCompressionContextAcrossFrames (0.00s)
+--- PASS: TestCompressionContextAcrossFrames (0.01s)
 === RUN   TestMultipleSPDYFrames
---- PASS: TestMultipleSPDYFrames (0.01s)
+--- PASS: TestMultipleSPDYFrames (0.00s)
 === RUN   TestReadMalformedZlibHeader
 --- PASS: TestReadMalformedZlibHeader (0.00s)
 === RUN   TestNoZeroStreamId
     spdy_test.go:633: TODO: update to work with SPDY3
 --- SKIP: TestNoZeroStreamId (0.00s)
 PASS
-ok  	github.com/moby/spdystream/spdy	0.041s
+ok  	github.com/moby/spdystream/spdy	0.052s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -563,12 +581,14 @@
 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/7846/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/7846/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/19533 and its subdirectories
-I: Current time: Fri Apr 14 15:01:49 -12 2023
-I: pbuilder-time-stamp: 1681527709
+I: removing directory /srv/workspace/pbuilder/7846 and its subdirectories
+I: Current time: Fri May 17 23:27:28 +14 2024
+I: pbuilder-time-stamp: 1715938048