Diff of the two buildlogs:

--
--- b1/build.log	2024-10-06 02:26:22.692266783 +0000
+++ b2/build.log	2024-10-06 02:28:47.458112920 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Oct  5 14:18:34 -12 2024
-I: pbuilder-time-stamp: 1728181114
+I: Current time: Sun Oct  6 16:26:31 +14 2024
+I: pbuilder-time-stamp: 1728181591
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking golang-github-gorilla-websocket_1.5.3-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/25418/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3701/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64z.
+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 Oct  6 02:26 /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/3701/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3701/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='unstable'
-  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]="32" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.32(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=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='7195ff6f9e4543a8b3a269e609ef0758'
-  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='25418'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d019f8c250104ae6a335d7d3e087e8dc
+  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=3701
   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.G8LPUlTf/pbuilderrc_tRbi --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.G8LPUlTf/b1 --logfile b1/build.log golang-github-gorilla-websocket_1.5.3-1.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  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.G8LPUlTf/pbuilderrc_DOHF --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.G8LPUlTf/b2 --logfile b2/build.log golang-github-gorilla-websocket_1.5.3-1.dsc'
+  SUDO_GID=110
+  SUDO_UID=103
+  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 cbxi4a 6.1.0-23-armmp #1 SMP Debian 6.1.99-1 (2024-07-15) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-26-arm64 #1 SMP Debian 6.1.112-1 (2024-09-30) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/25418/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/3701/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -153,7 +185,7 @@
 Get: 38 http://deb.debian.org/debian unstable/main armhf golang-golang-x-text-dev all 0.16.0-1 [4003 kB]
 Get: 39 http://deb.debian.org/debian unstable/main armhf golang-golang-x-crypto-dev all 1:0.25.0-1 [1682 kB]
 Get: 40 http://deb.debian.org/debian unstable/main armhf golang-golang-x-net-dev all 1:0.27.0-1 [898 kB]
-Fetched 68.9 MB in 5s (12.6 MB/s)
+Fetched 68.9 MB in 2s (41.4 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 ... 19506 files and directories currently installed.)
@@ -328,7 +360,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-gorilla-websocket-1.5.3/ && 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-gorilla-websocket_1.5.3-1_source.changes
+I: user script /srv/workspace/pbuilder/3701/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/3701/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-gorilla-websocket-1.5.3/ && 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-gorilla-websocket_1.5.3-1_source.changes
 dpkg-buildpackage: info: source package golang-github-gorilla-websocket
 dpkg-buildpackage: info: source version 1.5.3-1
 dpkg-buildpackage: info: source distribution unstable
@@ -346,17 +382,17 @@
    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 github.com/gorilla/websocket
-internal/goarch
+	cd _build && go install -trimpath -v -p 4 github.com/gorilla/websocket
 internal/unsafeheader
-internal/cpu
 internal/byteorder
+internal/goarch
+internal/cpu
+internal/coverage/rtcov
 internal/abi
 internal/chacha8rand
-internal/bytealg
-internal/coverage/rtcov
 internal/godebugs
 internal/goexperiment
+internal/bytealg
 internal/goos
 internal/profilerecord
 internal/runtime/atomic
@@ -364,20 +400,20 @@
 internal/stringslite
 runtime/internal/math
 runtime/internal/sys
-internal/runtime/exithook
 internal/race
 sync/atomic
 unicode
+internal/runtime/exithook
 unicode/utf8
 cmp
 internal/itoa
-math/bits
-runtime
-math
 internal/asan
+math/bits
 internal/msan
 crypto/internal/alias
 crypto/internal/boring/sig
+math
+runtime
 container/list
 unicode/utf16
 vendor/golang.org/x/crypto/cryptobyte/asn1
@@ -386,78 +422,85 @@
 encoding
 log/internal
 iter
+crypto/subtle
 internal/reflectlite
 sync
 slices
-crypto/subtle
 internal/weak
 maps
-internal/testlog
 internal/bisect
+internal/testlog
 internal/singleflight
-errors
 runtime/cgo
+errors
+sort
 io
 strconv
-bytes
-strings
-reflect
-bufio
 internal/oserror
 path
+bytes
+strings
 internal/godebug
+reflect
 syscall
-sort
+bufio
 hash
 crypto
 crypto/cipher
 crypto/internal/boring
 crypto/internal/randutil
-time
-internal/syscall/unix
-internal/syscall/execenv
 math/rand
-internal/fmtsort
 crypto/sha1
 crypto/aes
 crypto/des
 crypto/internal/edwards25519/field
+time
+internal/syscall/unix
+internal/syscall/execenv
 crypto/internal/nistec/fiat
 crypto/sha512
 crypto/internal/edwards25519
+crypto/hmac
+vendor/golang.org/x/crypto/hkdf
 io/fs
-internal/filepathlite
 internal/poll
+internal/fmtsort
 context
-crypto/hmac
+internal/filepathlite
 encoding/binary
+crypto/md5
 os
+crypto/rc4
+crypto/sha256
+vendor/golang.org/x/net/dns/dnsmessage
 vendor/golang.org/x/crypto/chacha20
 vendor/golang.org/x/crypto/internal/poly1305
 vendor/golang.org/x/crypto/chacha20poly1305
-vendor/golang.org/x/crypto/hkdf
-crypto/md5
-crypto/rc4
-crypto/sha256
-crypto/internal/nistec
 encoding/base64
+crypto/internal/nistec
+encoding/pem
+math/rand/v2
+hash/crc32
 fmt
 vendor/golang.org/x/sys/cpu
+internal/concurrent
 vendor/golang.org/x/crypto/sha3
-encoding/pem
+unique
 crypto/ecdh
-vendor/golang.org/x/net/dns/dnsmessage
-math/rand/v2
+net/netip
+path/filepath
+io/ioutil
+vendor/golang.org/x/text/transform
+net/http/internal/ascii
 compress/flate
 math/big
 encoding/hex
-internal/concurrent
-unique
 net/url
-net/netip
-path/filepath
-encoding/json
 net
+encoding/json
+compress/gzip
+log
+vendor/golang.org/x/text/unicode/bidi
 crypto/rand
 crypto/elliptic
 crypto/internal/bigmod
@@ -467,24 +510,17 @@
 crypto/internal/hpke
 crypto/internal/mlkem768
 crypto/rsa
-vendor/golang.org/x/crypto/cryptobyte
 crypto/dsa
+vendor/golang.org/x/crypto/cryptobyte
 crypto/x509/pkix
-io/ioutil
-crypto/ecdsa
-hash/crc32
-compress/gzip
-vendor/golang.org/x/text/transform
-log
-vendor/golang.org/x/text/unicode/norm
-vendor/golang.org/x/text/unicode/bidi
 vendor/golang.org/x/text/secure/bidirule
+vendor/golang.org/x/text/unicode/norm
 vendor/golang.org/x/net/http2/hpack
+crypto/ecdsa
 mime
-vendor/golang.org/x/net/idna
 mime/quotedprintable
 net/http/internal
-net/http/internal/ascii
+vendor/golang.org/x/net/idna
 vendor/golang.org/x/net/http/httpproxy
 net/textproto
 crypto/x509
@@ -495,9 +531,9 @@
 net/http
 github.com/gorilla/websocket
    dh_auto_test -O--builddirectory=_build -O--buildsystem=golang
-	cd _build && go test -vet=off -v -p 3 github.com/gorilla/websocket
+	cd _build && go test -vet=off -v -p 4 github.com/gorilla/websocket
 === RUN   TestProxyDial
---- PASS: TestProxyDial (0.01s)
+--- PASS: TestProxyDial (0.00s)
 === RUN   TestProxyAuthorizationDial
 --- PASS: TestProxyAuthorizationDial (0.00s)
 === RUN   TestDial
@@ -505,14 +541,12 @@
 === RUN   TestDialCookieJar
 --- PASS: TestDialCookieJar (0.00s)
 === RUN   TestDialTLS
---- PASS: TestDialTLS (0.12s)
+--- PASS: TestDialTLS (0.03s)
 === RUN   TestDialTimeout
 --- PASS: TestDialTimeout (0.00s)
 === RUN   TestHandshakeTimeout
-    client_server_test.go:109: NextReader: websocket: close 1006 (abnormal closure): unexpected EOF
 --- PASS: TestHandshakeTimeout (0.00s)
 === RUN   TestHandshakeTimeoutInContext
-    client_server_test.go:109: NextReader: websocket: close 1006 (abnormal closure): unexpected EOF
 --- PASS: TestHandshakeTimeoutInContext (0.00s)
 === RUN   TestDialBadScheme
 --- PASS: TestDialBadScheme (0.00s)
@@ -525,7 +559,7 @@
     client_server_test.go:97: Upgrade: websocket: request origin not allowed by Upgrader.CheckOrigin
     client_server_test.go:97: Upgrade: websocket: request origin not allowed by Upgrader.CheckOrigin
     client_server_test.go:97: Upgrade: websocket: request origin not allowed by Upgrader.CheckOrigin
---- PASS: TestDialBadHeader (0.01s)
+--- PASS: TestDialBadHeader (0.00s)
 === RUN   TestBadMethod
 --- PASS: TestBadMethod (0.00s)
 === RUN   TestDialExtraTokensInRespHeaders
@@ -535,22 +569,22 @@
 === RUN   TestRespOnBadHandshake
 --- PASS: TestRespOnBadHandshake (0.00s)
 === RUN   TestHost
-    client_server_test.go:567: http: TLS handshake error from 127.0.0.1:59094: remote error: tls: bad certificate
-    client_server_test.go:567: http: TLS handshake error from 127.0.0.1:59108: remote error: tls: bad certificate
---- PASS: TestHost (1.41s)
+    client_server_test.go:567: http: TLS handshake error from 127.0.0.1:40540: remote error: tls: bad certificate
+    client_server_test.go:567: http: TLS handshake error from 127.0.0.1:40546: remote error: tls: bad certificate
+--- PASS: TestHost (0.38s)
 === RUN   TestDialCompression
 --- PASS: TestDialCompression (0.01s)
 === RUN   TestSocksProxyDial
---- PASS: TestSocksProxyDial (0.01s)
+--- PASS: TestSocksProxyDial (0.00s)
 === RUN   TestTracingDialWithContext
---- PASS: TestTracingDialWithContext (0.12s)
+--- PASS: TestTracingDialWithContext (0.03s)
 === RUN   TestEmptyTracingDialWithContext
---- PASS: TestEmptyTracingDialWithContext (0.12s)
+--- PASS: TestEmptyTracingDialWithContext (0.03s)
 === RUN   TestNetDialConnect
---- PASS: TestNetDialConnect (0.59s)
+--- PASS: TestNetDialConnect (0.15s)
 === RUN   TestNextProtos
-2024/10/06 02:25:44 http2: server: error reading preface from client 127.0.0.1:33284: bogus greeting "GET / HTTP/1.1\r\nHost: 12"
---- PASS: TestNextProtos (0.23s)
+2024/10/06 02:28:34 http2: server: error reading preface from client 127.0.0.1:54002: bogus greeting "GET / HTTP/1.1\r\nHost: 12"
+--- PASS: TestNextProtos (0.06s)
 === RUN   TestHostPortNoPort
 --- PASS: TestHostPortNoPort (0.00s)
 === RUN   TestTruncWriter
@@ -954,7 +988,7 @@
     conn_test.go:127: frame size: 65535
     conn_test.go:127: frame size: 65535
     conn_test.go:127: frame size: 65535
---- PASS: TestFraming (0.68s)
+--- PASS: TestFraming (0.19s)
 === RUN   TestControl
 --- PASS: TestControl (0.00s)
 === RUN   TestWriteBufferPool
@@ -1002,9 +1036,9 @@
 === RUN   TestDeprecatedJSON
 --- PASS: TestDeprecatedJSON (0.00s)
 === RUN   TestMaskBytes
---- PASS: TestMaskBytes (0.19s)
+--- PASS: TestMaskBytes (0.05s)
 === RUN   TestPreparedMessage
---- PASS: TestPreparedMessage (0.02s)
+--- PASS: TestPreparedMessage (0.01s)
 === RUN   TestSubprotocols
 --- PASS: TestSubprotocols (0.00s)
 === RUN   TestIsWebSocketUpgrade
@@ -1024,7 +1058,7 @@
 === RUN   TestX
 --- PASS: TestX (0.00s)
 PASS
-ok  	github.com/gorilla/websocket	3.637s
+ok  	github.com/gorilla/websocket	0.980s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--builddirectory=_build -O--buildsystem=golang
    dh_prep -O--builddirectory=_build -O--buildsystem=golang
@@ -1052,12 +1086,14 @@
 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/3701/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3701/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/25418 and its subdirectories
-I: Current time: Sat Oct  5 14:26:18 -12 2024
-I: pbuilder-time-stamp: 1728181578
+I: removing directory /srv/workspace/pbuilder/3701 and its subdirectories
+I: Current time: Sun Oct  6 16:28:43 +14 2024
+I: pbuilder-time-stamp: 1728181723