Diff of the two buildlogs:

--
--- b1/build.log	2025-03-04 15:35:40.118233741 +0000
+++ b2/build.log	2025-03-04 15:36:50.379075960 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Mar  4 03:34:00 -12 2025
-I: pbuilder-time-stamp: 1741102440
+I: Current time: Wed Mar  5 05:35:51 +14 2025
+I: pbuilder-time-stamp: 1741102551
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -27,52 +27,84 @@
 dpkg-source: info: applying 04_inline_check_pmdir
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/31071/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/9125/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64b.
+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 Mar  4 15:36 /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/9125/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/9125/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='trixie'
-  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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='ed59afcc711743288a921c883c1677d7'
-  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='31071'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=3e7d122d95c04ed0b568b774ccc29f90
+  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=9125
   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.QkDUV5hA/pbuilderrc_qghU --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.QkDUV5hA/b1 --logfile b1/build.log stow_2.4.1-2.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.QkDUV5hA/pbuilderrc_7dOc --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.QkDUV5hA/b2 --logfile b2/build.log stow_2.4.1-2.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 ff4a 6.1.0-31-armmp-lpae #1 SMP Debian 6.1.128-1 (2025-02-07) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) 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/31071/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/9125/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -150,7 +182,7 @@
 Get: 34 http://deb.debian.org/debian trixie/main armhf libio-stringy-perl all 2.113-2 [48.3 kB]
 Get: 35 http://deb.debian.org/debian trixie/main armhf libtest-output-perl all 1.035-1 [16.4 kB]
 Get: 36 http://deb.debian.org/debian trixie/main armhf quilt all 0.68-1 [437 kB]
-Fetched 20.4 MB in 1s (13.8 MB/s)
+Fetched 20.4 MB in 0s (62.5 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 ... 19527 files and directories currently installed.)
@@ -309,7 +341,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/stow-2.4.1/ && 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  > ../stow_2.4.1-2_source.changes
+I: user script /srv/workspace/pbuilder/9125/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/9125/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/stow-2.4.1/ && 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  > ../stow_2.4.1-2_source.changes
 dpkg-buildpackage: info: source package stow
 dpkg-buildpackage: info: source version 2.4.1-2
 dpkg-buildpackage: info: source distribution unstable
@@ -347,17 +383,20 @@
 config.status: creating Makefile
 make[1]: Leaving directory '/build/reproducible-path/stow-2.4.1'
    dh_auto_build
-	make -j3
+	make -j4
 make[1]: Entering directory '/build/reproducible-path/stow-2.4.1'
 [ -d bin ] || mkdir bin # required in vpath mode
+[ -d doc ] || mkdir doc # required in vpath mode
 echo
-make[2]: Entering directory '/build/reproducible-path/stow-2.4.1'
 
+sed -e 's|[@]PERL[@]|/usr/bin/perl|g' -e 's|[@]VERSION[@]|2.4.1|g' -e "s|[@]USE_LIB_PMDIR[@]|$use_lib_pmdir|g" < bin/stow.in | pod2man --name stow --section 8 > doc/stow.8
+make[2]: Entering directory '/build/reproducible-path/stow-2.4.1'
 echo "# Perl modules will be installed to /usr/share/perl5"
 # Perl modules will be installed to /usr/share/perl5
 make[2]: Leaving directory '/build/reproducible-path/stow-2.4.1'
 echo "# "
 # 
+Generated bin/chkstow from bin/chkstow.in
 if PERL5LIB= /usr/bin/perl -V | awk '/@INC/ {p=1; next} p==1 {print $1}' | grep -q "/usr/share/perl5"; then \
     echo "# This is in /usr/bin/perl's built-in @INC, so everything"; \
     echo "# should work fine with no extra effort."; \
@@ -366,21 +405,18 @@
     echo "# front-end scripts will have an appropriate \"use lib\""; \
     echo "# line inserted to compensate."; \
 fi
-Generated bin/chkstow from bin/chkstow.in
 chmod +x bin/chkstow
-[ -d doc ] || mkdir doc # required in vpath mode
-sed -e 's|[@]PERL[@]|/usr/bin/perl|g' -e 's|[@]VERSION[@]|2.4.1|g' -e "s|[@]USE_LIB_PMDIR[@]|$use_lib_pmdir|g" < bin/stow.in | pod2man --name stow --section 8 > doc/stow.8
+Generated lib/Stow.pm from lib/Stow.pm.in and ./default-ignore-list
 # This is in /usr/bin/perl's built-in @INC, so everything
 # should work fine with no extra effort.
 echo
+Generated lib/Stow/Util.pm from lib/Stow/Util.pm.in
 
 Generated bin/stow from bin/stow.in
-Generated lib/Stow.pm from lib/Stow.pm.in and ./default-ignore-list
 chmod +x bin/stow
-Generated lib/Stow/Util.pm from lib/Stow/Util.pm.in
 make[1]: Leaving directory '/build/reproducible-path/stow-2.4.1'
    dh_auto_test
-	make -j3 test "TESTSUITEFLAGS=-j3 --verbose" VERBOSE=1
+	make -j4 test "TESTSUITEFLAGS=-j4 --verbose" VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/stow-2.4.1'
 make  tmp-testing-trees tmp-testing-trees-compat
 make[2]: Entering directory '/build/reproducible-path/stow-2.4.1'
@@ -409,27 +445,27 @@
 Attempt to call undefined import method with arguments ("make_path") via package "File::Spec" (Perhaps you forgot to load the package?) at t/unstow.t line 25.
 t/unstow.t ..................... ok
 All tests successful.
-Files=16, Tests=478,  8 wallclock secs ( 0.43 usr  0.07 sys +  6.96 cusr  0.95 csys =  8.41 CPU)
+Files=16, Tests=478,  6 wallclock secs ( 0.24 usr  0.06 sys +  4.98 cusr  0.70 csys =  5.98 CPU)
 Result: PASS
 make[2]: Leaving directory '/build/reproducible-path/stow-2.4.1'
 make[1]: Leaving directory '/build/reproducible-path/stow-2.4.1'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/stow/
-	make -j3 install DESTDIR=/build/reproducible-path/stow-2.4.1/debian/stow AM_UPDATE_INFO_DIR=no
+	make -j4 install DESTDIR=/build/reproducible-path/stow-2.4.1/debian/stow AM_UPDATE_INFO_DIR=no
 make[1]: Entering directory '/build/reproducible-path/stow-2.4.1'
 make[2]: Entering directory '/build/reproducible-path/stow-2.4.1'
  /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/bin'
  /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/doc/stow'
+ /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/man/man8'
+ /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/info'
  /usr/bin/install -c -m 644 README.md doc/manual-single.html doc/version.texi ChangeLog doc/ChangeLog.OLD '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/doc/stow'
  /usr/bin/install -c bin/stow bin/chkstow '/build/reproducible-path/stow-2.4.1/debian/stow/usr/bin'
- /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/info'
- /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/man/man8'
  /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/perl5'
+ /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/perl5/Stow'
  /usr/bin/install -c -m 644 ./doc/stow.info '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/info'
  /usr/bin/install -c -m 644 lib/Stow.pm '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/perl5'
  /usr/bin/install -c -m 644 doc/stow.8 '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/man/man8'
- /usr/bin/mkdir -p '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/perl5/Stow'
  /usr/bin/install -c -m 644 lib/Stow/Util.pm '/build/reproducible-path/stow-2.4.1/debian/stow/usr/share/perl5/Stow'
 make  install-data-hook
 make[3]: Entering directory '/build/reproducible-path/stow-2.4.1'
@@ -459,12 +495,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/9125/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/9125/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/31071 and its subdirectories
-I: Current time: Tue Mar  4 03:35:33 -12 2025
-I: pbuilder-time-stamp: 1741102533
+I: removing directory /srv/workspace/pbuilder/9125 and its subdirectories
+I: Current time: Wed Mar  5 05:36:46 +14 2025
+I: pbuilder-time-stamp: 1741102606