Diff of the two buildlogs:

--
--- b1/build.log	2024-12-13 06:20:29.866077287 +0000
+++ b2/build.log	2024-12-13 06:23:10.094767679 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Dec 12 18:17:38 -12 2024
-I: pbuilder-time-stamp: 1734070658
+I: Current time: Fri Dec 13 20:20:39 +14 2024
+I: pbuilder-time-stamp: 1734070839
 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-blackfriday_1.6.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3883/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/9801/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64c.
+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 Dec 13 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/9801/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/9801/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]="37" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  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=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='f1b240390d5a4c068cc07922f4aa466f'
-  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='3883'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=793a8d4e0cc24f66a4388d5a818e6198
+  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=9801
   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.DtiQGo7s/pbuilderrc_EYiQ --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.DtiQGo7s/b1 --logfile b1/build.log golang-blackfriday_1.6.0-1.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.DtiQGo7s/pbuilderrc_eLZi --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.DtiQGo7s/b2 --logfile b2/build.log golang-blackfriday_1.6.0-1.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  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 virt32a 6.1.0-28-armmp-lpae #1 SMP Debian 6.1.119-1 (2024-11-22) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3883/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/9801/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -146,7 +178,7 @@
 Get: 33 http://deb.debian.org/debian unstable/main armhf golang-src all 2:1.23~2 [5088 B]
 Get: 34 http://deb.debian.org/debian unstable/main armhf golang-go armhf 2:1.23~2 [44.3 kB]
 Get: 35 http://deb.debian.org/debian unstable/main armhf golang-any armhf 2:1.23~2 [5172 B]
-Fetched 62.0 MB in 1s (51.7 MB/s)
+Fetched 62.0 MB in 1s (41.8 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 ... 19680 files and directories currently installed.)
@@ -301,7 +333,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-blackfriday-1.6.0/ && 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-blackfriday_1.6.0-1_source.changes
+I: user script /srv/workspace/pbuilder/9801/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/9801/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-blackfriday-1.6.0/ && 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-blackfriday_1.6.0-1_source.changes
 dpkg-buildpackage: info: source package golang-blackfriday
 dpkg-buildpackage: info: source version 1.6.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -319,38 +355,38 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 3 github.com/russross/blackfriday
-internal/unsafeheader
+	cd obj-arm-linux-gnueabihf && go install -trimpath -v -p 4 github.com/russross/blackfriday
+internal/byteorder
 internal/goarch
 internal/cpu
-internal/byteorder
+internal/unsafeheader
+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
 internal/runtime/syscall
-internal/stringslite
 runtime/internal/math
+internal/stringslite
 runtime/internal/sys
-internal/runtime/exithook
 internal/race
 sync/atomic
 unicode
+internal/runtime/exithook
 unicode/utf8
-runtime
 cmp
 internal/itoa
 math/bits
-math
 internal/asan
 internal/msan
-internal/reflectlite
+math
+runtime
 iter
+internal/reflectlite
 sync
 slices
 internal/bisect
@@ -358,32 +394,32 @@
 errors
 sort
 io
-strconv
-bytes
 internal/oserror
+strconv
 path
 internal/godebug
+bytes
 syscall
-reflect
 strings
+reflect
 regexp/syntax
 regexp
 time
 internal/syscall/unix
 internal/syscall/execenv
-internal/fmtsort
-io/fs
 internal/poll
+io/fs
 internal/filepathlite
+internal/fmtsort
 os
 fmt
 github.com/russross/blackfriday
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/golang-blackfriday-1.6.0'
 dh_auto_test -O--buildsystem=golang -- -timeout 30m
-	cd obj-arm-linux-gnueabihf && go test -vet=off -v -p 3 -timeout 30m github.com/russross/blackfriday
+	cd obj-arm-linux-gnueabihf && go test -vet=off -v -p 4 -timeout 30m github.com/russross/blackfriday
 === RUN   TestPrefixHeaderNoExtensions
---- PASS: TestPrefixHeaderNoExtensions (0.03s)
+--- PASS: TestPrefixHeaderNoExtensions (0.02s)
 === RUN   TestPrefixHeaderSpaceExtension
 --- PASS: TestPrefixHeaderSpaceExtension (0.02s)
 === RUN   TestPrefixHeaderIdExtension
@@ -391,13 +427,13 @@
 === RUN   TestPrefixHeaderIdExtensionWithPrefixAndSuffix
 --- PASS: TestPrefixHeaderIdExtensionWithPrefixAndSuffix (0.04s)
 === RUN   TestPrefixAutoHeaderIdExtension
---- PASS: TestPrefixAutoHeaderIdExtension (0.04s)
+--- PASS: TestPrefixAutoHeaderIdExtension (0.03s)
 === RUN   TestPrefixAutoHeaderIdExtensionWithPrefixAndSuffix
 --- PASS: TestPrefixAutoHeaderIdExtensionWithPrefixAndSuffix (0.04s)
 === RUN   TestPrefixMultipleHeaderExtensions
 --- PASS: TestPrefixMultipleHeaderExtensions (0.01s)
 === RUN   TestUnderlineHeaders
---- PASS: TestUnderlineHeaders (0.04s)
+--- PASS: TestUnderlineHeaders (0.03s)
 === RUN   TestUnderlineHeadersAutoIDs
 --- PASS: TestUnderlineHeadersAutoIDs (0.04s)
 === RUN   TestHorizontalRule
@@ -409,35 +445,35 @@
 === RUN   TestOrderedList
 --- PASS: TestOrderedList (0.12s)
 === RUN   TestDefinitionList
---- PASS: TestDefinitionList (0.21s)
+--- PASS: TestDefinitionList (0.19s)
 === RUN   TestPreformattedHtml
---- PASS: TestPreformattedHtml (0.08s)
+--- PASS: TestPreformattedHtml (0.07s)
 === RUN   TestPreformattedHtmlLax
 --- PASS: TestPreformattedHtmlLax (0.05s)
 === RUN   TestFencedCodeBlock
---- PASS: TestFencedCodeBlock (0.52s)
+--- PASS: TestFencedCodeBlock (0.46s)
 === RUN   TestFencedCodeInsideBlockquotes
 --- PASS: TestFencedCodeInsideBlockquotes (0.16s)
 === RUN   TestTable
 --- PASS: TestTable (0.05s)
 === RUN   TestUnorderedListWith_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
---- PASS: TestUnorderedListWith_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (0.12s)
+--- PASS: TestUnorderedListWith_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (0.13s)
 === RUN   TestOrderedList_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
---- PASS: TestOrderedList_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (0.14s)
+--- PASS: TestOrderedList_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (0.13s)
 === RUN   TestFencedCodeBlock_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
---- PASS: TestFencedCodeBlock_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (0.11s)
+--- PASS: TestFencedCodeBlock_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (0.10s)
 === RUN   TestListWithFencedCodeBlock
 --- PASS: TestListWithFencedCodeBlock (0.01s)
 === RUN   TestListWithMalformedFencedCodeBlock
 --- PASS: TestListWithMalformedFencedCodeBlock (0.01s)
 === RUN   TestListWithFencedCodeBlockNoExtensions
---- PASS: TestListWithFencedCodeBlockNoExtensions (0.02s)
+--- PASS: TestListWithFencedCodeBlockNoExtensions (0.01s)
 === RUN   TestTitleBlock_EXTENSION_TITLEBLOCK
 --- PASS: TestTitleBlock_EXTENSION_TITLEBLOCK (0.01s)
 === RUN   TestBlockComments
 --- PASS: TestBlockComments (0.03s)
 === RUN   TestCDATA
---- PASS: TestCDATA (0.06s)
+--- PASS: TestCDATA (0.04s)
 === RUN   TestIsFenceLine
 --- PASS: TestIsFenceLine (0.00s)
 === RUN   TestJoinLines
@@ -445,17 +481,17 @@
 === RUN   TestSanitizedAnchorName
 --- PASS: TestSanitizedAnchorName (0.00s)
 === RUN   TestEmphasis
---- PASS: TestEmphasis (0.06s)
+--- PASS: TestEmphasis (0.05s)
 === RUN   TestNoIntraEmphasis
 --- PASS: TestNoIntraEmphasis (0.01s)
 === RUN   TestReferenceOverride
 --- PASS: TestReferenceOverride (0.07s)
 === RUN   TestStrong
---- PASS: TestStrong (0.05s)
+--- PASS: TestStrong (0.04s)
 === RUN   TestEmphasisMix
 --- PASS: TestEmphasisMix (0.02s)
 === RUN   TestEmphasisLink
---- PASS: TestEmphasisLink (0.03s)
+--- PASS: TestEmphasisLink (0.02s)
 === RUN   TestStrikeThrough
 --- PASS: TestStrikeThrough (0.02s)
 === RUN   TestCodeSpan
@@ -463,27 +499,27 @@
 === RUN   TestLineBreak
 --- PASS: TestLineBreak (0.02s)
 === RUN   TestInlineLink
---- PASS: TestInlineLink (0.76s)
+--- PASS: TestInlineLink (0.68s)
 === RUN   TestRelAttrLink
---- PASS: TestRelAttrLink (0.03s)
+--- PASS: TestRelAttrLink (0.02s)
 === RUN   TestHrefTargetBlank
---- PASS: TestHrefTargetBlank (0.01s)
+--- PASS: TestHrefTargetBlank (0.00s)
 === RUN   TestSafeInlineLink
 --- PASS: TestSafeInlineLink (0.02s)
 === RUN   TestReferenceLink
---- PASS: TestReferenceLink (0.19s)
+--- PASS: TestReferenceLink (0.17s)
 === RUN   TestTags
 --- PASS: TestTags (0.01s)
 === RUN   TestAutoLink
---- PASS: TestAutoLink (1.15s)
+--- PASS: TestAutoLink (1.00s)
 === RUN   TestFootnotes
---- PASS: TestFootnotes (0.59s)
+--- PASS: TestFootnotes (0.54s)
 === RUN   TestFootnotesWithParameters
---- PASS: TestFootnotesWithParameters (0.58s)
+--- PASS: TestFootnotesWithParameters (0.54s)
 === RUN   TestNestedFootnotes
---- PASS: TestNestedFootnotes (0.19s)
+--- PASS: TestNestedFootnotes (0.16s)
 === RUN   TestInlineComments
---- PASS: TestInlineComments (0.02s)
+--- PASS: TestInlineComments (0.01s)
 === RUN   TestSmartDoubleQuotes
 --- PASS: TestSmartDoubleQuotes (0.01s)
 === RUN   TestSmartDoubleQuotesNbsp
@@ -499,11 +535,11 @@
 === RUN   TestDocument
 --- PASS: TestDocument (0.00s)
 === RUN   TestReference
---- PASS: TestReference (18.09s)
+--- PASS: TestReference (17.74s)
 === RUN   TestReference_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
---- PASS: TestReference_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (17.61s)
+--- PASS: TestReference_EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK (18.05s)
 PASS
-ok  	github.com/russross/blackfriday	41.799s
+ok  	github.com/russross/blackfriday	41.313s
 make[1]: Leaving directory '/build/reproducible-path/golang-blackfriday-1.6.0'
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
@@ -531,12 +567,14 @@
 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/9801/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/9801/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/3883 and its subdirectories
-I: Current time: Thu Dec 12 18:20:26 -12 2024
-I: pbuilder-time-stamp: 1734070826
+I: removing directory /srv/workspace/pbuilder/9801 and its subdirectories
+I: Current time: Fri Dec 13 20:23:06 +14 2024
+I: pbuilder-time-stamp: 1734070986