Diff of the two buildlogs:

--
--- b1/build.log	2024-05-17 03:09:39.830126370 +0000
+++ b2/build.log	2024-05-17 03:10:37.475675280 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu May 16 15:06:36 -12 2024
-I: pbuilder-time-stamp: 1715915196
+I: Current time: Thu Jun 19 23:32:42 +14 2025
+I: pbuilder-time-stamp: 1750325562
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking libcache-fastmmap-perl_1.57-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3266160/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2878302/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos5-amd64.
+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 Jun 19 09:32 /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/2878302/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2878302/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='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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]="21" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.21(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='2c78e5580da4495b9200a6263891c7ec'
-  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='3266160'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=cc9c1daf9cff495a8c1a1b6beac9b338
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  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=2878302
   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.B67KiIsQ/pbuilderrc_AbVl --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.B67KiIsQ/b1 --logfile b1/build.log libcache-fastmmap-perl_1.57-2.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  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.B67KiIsQ/pbuilderrc_7D1v --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.B67KiIsQ/b2 --logfile b2/build.log libcache-fastmmap-perl_1.57-2.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://213.165.73.152:3128
 I: uname -a
-  Linux ionos11-amd64 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1 (2024-02-15) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 16 11:24 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3266160/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun 16 17:46 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2878302/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: 33 http://deb.debian.org/debian trixie/main amd64 libcompress-snappy-perl amd64 0.24+ds-3+b3 [10.9 kB]
 Get: 34 http://deb.debian.org/debian trixie/main amd64 libperl-dev amd64 5.38.2-4 [1087 kB]
 Get: 35 http://deb.debian.org/debian trixie/main amd64 libtest-deep-perl all 1.204-1 [52.9 kB]
-Fetched 20.2 MB in 3s (7270 kB/s)
+Fetched 20.2 MB in 0s (111 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 ... 19699 files and directories currently installed.)
@@ -305,7 +337,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libcache-fastmmap-perl-1.57/ && 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  > ../libcache-fastmmap-perl_1.57-2_source.changes
+I: user script /srv/workspace/pbuilder/2878302/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/2878302/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libcache-fastmmap-perl-1.57/ && 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  > ../libcache-fastmmap-perl_1.57-2_source.changes
 dpkg-buildpackage: info: source package libcache-fastmmap-perl
 dpkg-buildpackage: info: source version 1.57-2
 dpkg-buildpackage: info: source distribution unstable
@@ -327,15 +363,15 @@
 Writing Makefile for Cache::FastMmap
 Writing MYMETA.yml and MYMETA.json
    dh_auto_build
-	make -j20
+	make -j42
 make[1]: Entering directory '/build/reproducible-path/libcache-fastmmap-perl-1.57'
-Running Mkbootstrap for FastMmap ()
 "/usr/bin/perl" "/usr/share/perl/5.38/ExtUtils/xsubpp"  -typemap '/usr/share/perl/5.38/ExtUtils/typemap'  FastMmap.xs > FastMmap.xsc
+Running Mkbootstrap for FastMmap ()
 x86_64-linux-gnu-gcc -c  -I. -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -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/libcache-fastmmap-perl-1.57=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"1.57\" -DXS_VERSION=\"1.57\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.38/CORE"   mmap_cache.c
 x86_64-linux-gnu-gcc -c  -I. -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -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/libcache-fastmmap-perl-1.57=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"1.57\" -DXS_VERSION=\"1.57\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.38/CORE"   unix.c
 chmod 644 "FastMmap.bs"
-cp lib/Cache/FastMmap.pm blib/lib/Cache/FastMmap.pm
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- FastMmap.bs blib/arch/auto/Cache/FastMmap/FastMmap.bs 644
+cp lib/Cache/FastMmap.pm blib/lib/Cache/FastMmap.pm
 mv FastMmap.xsc FastMmap.c
 x86_64-linux-gnu-gcc -c  -I. -D_REENTRANT -D_GNU_SOURCE -DDEBIAN -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/libcache-fastmmap-perl-1.57=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"1.57\" -DXS_VERSION=\"1.57\" -fPIC "-I/usr/lib/x86_64-linux-gnu/perl/5.38/CORE"   FastMmap.c
 In file included from FastMmap.xs:5:
@@ -356,7 +392,7 @@
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/libcache-fastmmap-perl-1.57'
 dh_auto_test -- TEST_FILES="t/1.t t/10.t t/11.t t/12.t t/13.t t/14.t t/15.t t/16.t t/17.t t/18.t t/19.t t/2.t t/20.t t/22.t t/23.t t/3.t t/4.t t/5.t t/6.t t/7.t t/8.t t/9.t"
-	make -j20 test TEST_VERBOSE=1 "TEST_FILES=t/1.t t/10.t t/11.t t/12.t t/13.t t/14.t t/15.t t/16.t t/17.t t/18.t t/19.t t/2.t t/20.t t/22.t t/23.t t/3.t t/4.t t/5.t t/6.t t/7.t t/8.t t/9.t"
+	make -j42 test TEST_VERBOSE=1 "TEST_FILES=t/1.t t/10.t t/11.t t/12.t t/13.t t/14.t t/15.t t/16.t t/17.t t/18.t t/19.t t/2.t t/20.t t/22.t t/23.t t/3.t t/4.t t/5.t t/6.t t/7.t t/8.t t/9.t"
 make[2]: Entering directory '/build/reproducible-path/libcache-fastmmap-perl-1.57'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- FastMmap.bs blib/arch/auto/Cache/FastMmap/FastMmap.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/1.t t/10.t t/11.t t/12.t t/13.t t/14.t t/15.t t/16.t t/17.t t/18.t t/19.t t/2.t t/20.t t/22.t t/23.t t/3.t t/4.t t/5.t t/6.t t/7.t t/8.t t/9.t
@@ -390,9 +426,9 @@
 ok 26 - get('ghi') eq ...
 ok 27 - set('jkl', ...)
 ok 28 - empty get('jkl')
-ok 29 - set(ARRAY(0x55a2865663d8))
-ok 30 - get(ARRAY(0x55a2865663d8))
-ok 31 - get("ARRAY(0x55a2865663d8)")
+ok 29 - set(ARRAY(0x55f8364c6810))
+ok 30 - get(ARRAY(0x55f8364c6810))
+ok 31 - get("ARRAY(0x55f8364c6810)")
 ok 32 - set utf8 key
 ok 33 - get utf8 key
 ok 34 - set utf8 val
@@ -436,8 +472,8 @@
 ok 7 - cb get 4
 ok 8 - cb get 2
 ok 9 - items match 1$VAR1 = {
-#           'foo' => '123abc',
-#           'bar' => undef
+#           'bar' => undef,
+#           'foo' => '123abc'
 #         };
 # $VAR2 = {
 #           'foo' => '123abc',
@@ -973,7 +1009,7 @@
 ok 5 - hit rate 3
 ok 6
 ok 7 - hit rate 1
-ok 8 - hit rate 4 - 0.848988584017625
+ok 8 - hit rate 4 - 0.847186060484679
 ok
 t/4.t ... 
 1..9
@@ -1057,14 +1093,14 @@
 ok 5
 ok
 All tests successful.
-Files=22, Tests=607, 71 wallclock secs ( 0.20 usr  0.05 sys + 18.48 cusr  6.64 csys = 25.37 CPU)
+Files=22, Tests=607, 20 wallclock secs ( 0.12 usr  0.05 sys +  7.47 cusr  2.55 csys = 10.19 CPU)
 Result: PASS
 make[2]: Leaving directory '/build/reproducible-path/libcache-fastmmap-perl-1.57'
 make[1]: Leaving directory '/build/reproducible-path/libcache-fastmmap-perl-1.57'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/libcache-fastmmap-perl/
-	make -j20 install DESTDIR=/build/reproducible-path/libcache-fastmmap-perl-1.57/debian/libcache-fastmmap-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
+	make -j42 install DESTDIR=/build/reproducible-path/libcache-fastmmap-perl-1.57/debian/libcache-fastmmap-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/reproducible-path/libcache-fastmmap-perl-1.57'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- FastMmap.bs blib/arch/auto/Cache/FastMmap/FastMmap.bs 644
 Manifying 1 pod document
@@ -1090,8 +1126,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'libcache-fastmmap-perl-dbgsym' in '../libcache-fastmmap-perl-dbgsym_1.57-2_amd64.deb'.
 dpkg-deb: building package 'libcache-fastmmap-perl' in '../libcache-fastmmap-perl_1.57-2_amd64.deb'.
+dpkg-deb: building package 'libcache-fastmmap-perl-dbgsym' in '../libcache-fastmmap-perl-dbgsym_1.57-2_amd64.deb'.
  dpkg-genbuildinfo --build=binary -O../libcache-fastmmap-perl_1.57-2_amd64.buildinfo
  dpkg-genchanges --build=binary -O../libcache-fastmmap-perl_1.57-2_amd64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1099,12 +1135,14 @@
 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/2878302/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2878302/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/3266160 and its subdirectories
-I: Current time: Thu May 16 15:09:38 -12 2024
-I: pbuilder-time-stamp: 1715915378
+I: removing directory /srv/workspace/pbuilder/2878302 and its subdirectories
+I: Current time: Thu Jun 19 23:33:35 +14 2025
+I: pbuilder-time-stamp: 1750325615