Diff of the two buildlogs:

--
--- b1/build.log	2024-12-08 07:39:36.710854617 +0000
+++ b2/build.log	2024-12-08 07:40:41.695900734 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Dec  7 19:38:15 -12 2024
-I: pbuilder-time-stamp: 1733643495
+I: Current time: Sun Dec  8 21:39:45 +14 2024
+I: pbuilder-time-stamp: 1733643585
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -27,52 +27,84 @@
 dpkg-source: info: applying sv_dump.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2340/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/9926/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 Dec  8 07:39 /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/9926/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/9926/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='e3f33fd60a9f4ec3bb598fb52d072797'
-  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='2340'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=e93d470d6bdd427db951861f94c4c5d3
+  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=9926
   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.V9eTOzQ7/pbuilderrc_G4af --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.V9eTOzQ7/b1 --logfile b1/build.log libdevel-leak-perl_0.03-4.dsc'
-  SUDO_GID='112'
-  SUDO_UID='106'
-  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.V9eTOzQ7/pbuilderrc_w3dk --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.V9eTOzQ7/b2 --logfile b2/build.log libdevel-leak-perl_0.03-4.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 virt32b 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/2340/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/9926/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -141,7 +173,7 @@
 Get: 28 http://deb.debian.org/debian unstable/main armhf po-debconf all 1.0.21+nmu1 [248 kB]
 Get: 29 http://deb.debian.org/debian unstable/main armhf debhelper all 13.20 [915 kB]
 Get: 30 http://deb.debian.org/debian unstable/main armhf libperl-dev armhf 5.40.0-8 [998 kB]
-Fetched 20.1 MB in 1s (39.6 MB/s)
+Fetched 20.1 MB in 0s (63.5 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%
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(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.)
@@ -281,7 +313,11 @@
 fakeroot is already the newest version (1.36-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/libdevel-leak-perl-0.03/ && 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  > ../libdevel-leak-perl_0.03-4_source.changes
+I: user script /srv/workspace/pbuilder/9926/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/9926/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libdevel-leak-perl-0.03/ && 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  > ../libdevel-leak-perl_0.03-4_source.changes
 dpkg-buildpackage: info: source package libdevel-leak-perl
 dpkg-buildpackage: info: source version 0.03-4
 dpkg-buildpackage: info: source distribution unstable
@@ -304,13 +340,13 @@
 Writing Makefile for Devel::Leak
 Writing MYMETA.yml and MYMETA.json
    dh_auto_build
-	make -j3
+	make -j4
 make[1]: Entering directory '/build/reproducible-path/libdevel-leak-perl-0.03'
 Running Mkbootstrap for Leak ()
 "/usr/bin/perl" "/usr/share/perl/5.40/ExtUtils/xsubpp"  -typemap '/usr/share/perl/5.40/ExtUtils/typemap' -typemap '/build/reproducible-path/libdevel-leak-perl-0.03/typemap'  Leak.xs > Leak.xsc
 chmod 644 "Leak.bs"
-"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Leak.bs blib/arch/auto/Devel/Leak/Leak.bs 644
 cp Leak.pm blib/lib/Devel/Leak.pm
+"/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Leak.bs blib/arch/auto/Devel/Leak/Leak.bs 644
 mv Leak.xsc Leak.c
 arm-linux-gnueabihf-gcc -c   -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -D_TIME_BITS=64 -fwrapv -fno-strict-aliasing -pipe -I/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libdevel-leak-perl-0.03=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"0.03\" -DXS_VERSION=\"0.03\" -fPIC "-I/usr/lib/arm-linux-gnueabihf/perl/5.40/CORE"   Leak.c
 Leak.xs: In function 'check_arenas':
@@ -325,29 +361,29 @@
 Manifying 1 pod document
 make[1]: Leaving directory '/build/reproducible-path/libdevel-leak-perl-0.03'
    dh_auto_test
-	make -j3 test TEST_VERBOSE=1
+	make -j4 test TEST_VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/libdevel-leak-perl-0.03'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Leak.bs blib/arch/auto/Devel/Leak/Leak.bs 644
 PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(1, 'blib/lib', 'blib/arch')" t/*.t
-new 0x16b7328 : SV = PV(0x169c078) at 0x16b7328
+new 0x1f62378 : SV = PV(0x1f47078) at 0x1f62378
   REFCNT = 1
   FLAGS = (POK,IsCOW,pPOK)
-  PV = 0x1754c48 "one"\0
+  PV = 0x1fee1c0 "one"\0
   CUR = 3
   LEN = 12
   COW_REFCNT = 1
-new 0x16b7388 : SV = PV(0x169c040) at 0x16b7388
+new 0x1f623d8 : SV = PV(0x1f47040) at 0x1f623d8
   REFCNT = 1
   FLAGS = (POK,IsCOW,pPOK)
-  PV = 0x177ca68 "two"\0
+  PV = 0x2028418 "two"\0
   CUR = 3
   LEN = 12
   COW_REFCNT = 1
 t/basic.t .. 
 1..3
 # Running under perl version 5.040000 for linux
-# Current time local: Sun Dec  8 07:39:16 2024
-# Current time GMT:   Sun Dec  8 07:39:16 2024
+# Current time local: Sun Dec  8 07:40:31 2024
+# Current time GMT:   Sun Dec  8 07:40:31 2024
 # Using Test.pm version 1.31
 ok 1
 ok 2
@@ -355,7 +391,7 @@
 ok 3
 ok
 All tests successful.
-Files=1, Tests=3,  0 wallclock secs ( 0.05 usr  0.01 sys +  0.03 cusr  0.01 csys =  0.10 CPU)
+Files=1, Tests=3,  0 wallclock secs ( 0.04 usr  0.02 sys +  0.02 cusr  0.00 csys =  0.08 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/libdevel-leak-perl-0.03'
    create-stamp debian/debhelper-build-stamp
@@ -364,7 +400,7 @@
    dh_testroot
    dh_prep
    dh_auto_install --destdir=debian/libdevel-leak-perl/
-	make -j3 install DESTDIR=/build/reproducible-path/libdevel-leak-perl-0.03/debian/libdevel-leak-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
+	make -j4 install DESTDIR=/build/reproducible-path/libdevel-leak-perl-0.03/debian/libdevel-leak-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/reproducible-path/libdevel-leak-perl-0.03'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- Leak.bs blib/arch/auto/Devel/Leak/Leak.bs 644
 Manifying 1 pod document
@@ -403,12 +439,14 @@
 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/9926/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/9926/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/2340 and its subdirectories
-I: Current time: Sat Dec  7 19:39:32 -12 2024
-I: pbuilder-time-stamp: 1733643573
+I: removing directory /srv/workspace/pbuilder/9926 and its subdirectories
+I: Current time: Sun Dec  8 21:40:38 +14 2024
+I: pbuilder-time-stamp: 1733643638