Diff of the two buildlogs:

--
--- b1/build.log	2025-03-01 02:42:57.008040607 +0000
+++ b2/build.log	2025-03-01 02:44:00.413165346 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Feb 28 14:40:52 -12 2025
-I: pbuilder-time-stamp: 1740796852
+I: Current time: Fri Apr  3 23:05:58 +14 2026
+I: pbuilder-time-stamp: 1775207158
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -22,52 +22,84 @@
 dpkg-source: info: unpacking libcarp-assert-more-perl_2.8.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/834615/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1079017/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-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 Apr  3 09:06 /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/1079017/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1079017/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='unstable'
-  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]="37" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='6bdc519650e943f99da66ddbfbabf5d1'
-  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='834615'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=dddea12444b74837831c435ac6b9e275
+  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=1079017
   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.3iYMJGpG/pbuilderrc_eTLP --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.3iYMJGpG/b1 --logfile b1/build.log libcarp-assert-more-perl_2.8.0-1.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.3iYMJGpG/pbuilderrc_lSwc --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.3iYMJGpG/b2 --logfile b2/build.log libcarp-assert-more-perl_2.8.0-1.dsc'
+  SUDO_GID=111
+  SUDO_UID=106
+  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 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.9+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.9-1~bpo12+1 (2025-01-19) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/834615/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1079017/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: 35 http://deb.debian.org/debian unstable/main amd64 libtest-exception-perl all 0.43-3 [16.9 kB]
 Get: 36 http://deb.debian.org/debian unstable/main amd64 libtest-pod-coverage-perl all 1.10-3 [14.9 kB]
 Get: 37 http://deb.debian.org/debian unstable/main amd64 libtest-pod-perl all 1.52-3 [12.6 kB]
-Fetched 20.7 MB in 4s (4717 kB/s)
+Fetched 20.7 MB in 1s (40.6 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 ... 19779 files and directories currently installed.)
@@ -311,7 +343,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libcarp-assert-more-perl-2.8.0/ && 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  > ../libcarp-assert-more-perl_2.8.0-1_source.changes
+I: user script /srv/workspace/pbuilder/1079017/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/1079017/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libcarp-assert-more-perl-2.8.0/ && 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  > ../libcarp-assert-more-perl_2.8.0-1_source.changes
 dpkg-buildpackage: info: source package libcarp-assert-more-perl
 dpkg-buildpackage: info: source version 2.8.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -333,13 +369,13 @@
 Writing Makefile for Carp::Assert::More
 Writing MYMETA.yml and MYMETA.json
    dh_auto_build
-	make -j20
+	make -j42
 make[1]: Entering directory '/build/reproducible-path/libcarp-assert-more-perl-2.8.0'
 cp More.pm blib/lib/Carp/Assert/More.pm
 Manifying 1 pod document
 make[1]: Leaving directory '/build/reproducible-path/libcarp-assert-more-perl-2.8.0'
    dh_auto_test
-	make -j20 test TEST_VERBOSE=1
+	make -j42 test TEST_VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/libcarp-assert-more-perl-2.8.0'
 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
 # Testing Carp::Assert::More 2.8.0, Test::More 1.302199, Perl 5.040001, /usr/bin/perl
@@ -356,8 +392,8 @@
 ok 5 - Val: 14
 ok 6 - Val: 00
 ok 7 - Val:  
-ok 8 - Val: ARRAY(0x556265fc57e8)
-ok 9 - Val: HASH(0x556265fe72c0)
+ok 8 - Val: ARRAY(0x56268ea537e8)
+ok 9 - Val: HASH(0x56268ea75380)
 ok 10 - Val: foo
 ok
 t/assert_all_keys_in.t .......... 
@@ -620,10 +656,10 @@
 ok 1 - Checking  0
 ok 2 - Checking  foo
 ok 3 - Checking  undef
-ok 4 - Checking  HASH(0x55c55d46e738)
-ok 5 - Checking  ARRAY(0x55c55d477050)
-ok 6 - Checking  HASH(0x55c55d477440)
-ok 7 - Checking  ARRAY(0x55c55dbad680)
+ok 4 - Checking  HASH(0x55b8683e3768)
+ok 5 - Checking  ARRAY(0x55b8683ebf70)
+ok 6 - Checking  HASH(0x55b8683ec360)
+ok 7 - Checking  ARRAY(0x55b868b21ed0)
 ok 8 - threw Regexp ((?^ms:Assertion failed!.+Argument is not a hash or array\.))
 ok 9
 ok 10 - threw Regexp ((?^ms:Assertion\ \(Flooble\)\ failed\!.+Array contains 1 element\.))
@@ -691,8 +727,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x55e3391485b8)
-ok 4 - Checking HASH(0x55e339150dc0)
+ok 3 - Checking ARRAY(0x55c503d696f8)
+ok 4 - Checking HASH(0x55c503d71f00)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -814,8 +850,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x563e8027a648)
-ok 4 - Checking HASH(0x563e80282e10)
+ok 3 - Checking ARRAY(0x5652a01056f8)
+ok 4 - Checking HASH(0x5652a010df00)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -827,8 +863,8 @@
 1..11
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x55739c97f628)
-ok 4 - Checking HASH(0x55739c987f40)
+ok 3 - Checking ARRAY(0x55dbe05e6768)
+ok 4 - Checking HASH(0x55dbe05eee60)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -852,10 +888,10 @@
 ok 1 - Checking 0
 ok 2 - Checking foo
 ok 3 - Checking undef
-ok 4 - Checking HASH(0x55cf8c2d7738)
-ok 5 - Checking ARRAY(0x55cf8c2e0050)
-ok 6 - Checking HASH(0x55cf8c2e0440)
-ok 7 - Checking ARRAY(0x55cf8ca15780)
+ok 4 - Checking HASH(0x55c4104ed768)
+ok 5 - Checking ARRAY(0x55c4104f5f70)
+ok 6 - Checking HASH(0x55c4104f6360)
+ok 7 - Checking ARRAY(0x55c410c2b3b0)
 ok 8 - threw Regexp ((?^ms:Assertion failed!.+Argument is not a hash or array\.))
 ok 9 - threw Regexp ((?^ms:Assertion\ \(Flooble\)\ failed\!.+Array contains 0 elements\.))
 ok 10
@@ -866,8 +902,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x5565d939d5b8)
-ok 4 - Checking HASH(0x5565d93a5dc0)
+ok 3 - Checking ARRAY(0x561ca60b96f8)
+ok 4 - Checking HASH(0x561ca60c1ce0)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -879,8 +915,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x555e770fe6a8)
-ok 4 - Checking HASH(0x555e77106da0)
+ok 3 - Checking ARRAY(0x55f74f94f658)
+ok 4 - Checking HASH(0x55f74f957e60)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -900,8 +936,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x562c3b5466c8)
-ok 4 - Checking HASH(0x562c3b54edc0)
+ok 3 - Checking ARRAY(0x5621928f54d8)
+ok 4 - Checking HASH(0x5621928fddf0)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -913,8 +949,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x561e737fa738)
-ok 4 - Checking HASH(0x561e73802e30)
+ok 3 - Checking ARRAY(0x55d0a2843658)
+ok 4 - Checking HASH(0x55d0a284bf70)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -939,10 +975,10 @@
 ok 13 - <undef> fails assertion
 ok 14 - zero fails assertion
 ok 15 -  fails assertion
-ok 16 - ARRAY(0x563f442f2848) fails assertion
-ok 17 - HASH(0x563f442fadc0) fails assertion
-ok 18 - SCALAR(0x563f44a2b010) fails assertion
-ok 19 - GLOB(0x563f442fb630) fails assertion
+ok 16 - ARRAY(0x559efbb15768) fails assertion
+ok 17 - HASH(0x559efbb1ddf0) fails assertion
+ok 18 - SCALAR(0x559efc24c660) fails assertion
+ok 19 - GLOB(0x559efbb1e660) fails assertion
 ok 20 - 3-5 fails assertion
 ok 21 -  fails assertion
 ok
@@ -968,8 +1004,8 @@
 1..10
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x560332d26648)
-ok 4 - Checking HASH(0x560332d2ef20)
+ok 3 - Checking ARRAY(0x564f5ffe05e8)
+ok 4 - Checking HASH(0x564f5ffe8f00)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -981,8 +1017,8 @@
 1..11
 ok 1 - Checking undef
 ok 2 - Checking 
-ok 3 - Checking ARRAY(0x55c033de86a8)
-ok 4 - Checking HASH(0x55c033df0e20)
+ok 3 - Checking ARRAY(0x55e687e16768)
+ok 4 - Checking HASH(0x55e687e1ee60)
 ok 5 - Checking 5
 ok 6 - Checking 0
 ok 7 - Checking 0.4
@@ -1004,10 +1040,10 @@
 ok 9 -  fails assertion
 ok 10 - // fails assertion
 ok 11 - /Foo/ fails assertion
-ok 12 - ARRAY(0x55fd70cf8938) fails assertion
-ok 13 - HASH(0x55fd70d22dc0) fails assertion
-ok 14 - SCALAR(0x55fd714eca80) fails assertion
-ok 15 - GLOB(0x55fd70d23630) fails assertion
+ok 12 - ARRAY(0x558c1441e938) fails assertion
+ok 13 - HASH(0x558c14448f50) fails assertion
+ok 14 - SCALAR(0x558c14c11e20) fails assertion
+ok 15 - GLOB(0x558c144497c0) fails assertion
 ok
 t/assert_undefined.t ............ 
 1..4
@@ -1096,13 +1132,13 @@
 ok 51 - t/assert_xor.t exists
 ok
 All tests successful.
-Files=54, Tests=592, 19 wallclock secs ( 0.27 usr  0.23 sys +  8.42 cusr  1.58 csys = 10.50 CPU)
+Files=54, Tests=592,  5 wallclock secs ( 0.20 usr  0.08 sys +  3.25 cusr  0.61 csys =  4.14 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/libcarp-assert-more-perl-2.8.0'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/libcarp-assert-more-perl/
-	make -j20 install DESTDIR=/build/reproducible-path/libcarp-assert-more-perl-2.8.0/debian/libcarp-assert-more-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
+	make -j42 install DESTDIR=/build/reproducible-path/libcarp-assert-more-perl-2.8.0/debian/libcarp-assert-more-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/reproducible-path/libcarp-assert-more-perl-2.8.0'
 Manifying 1 pod document
 Installing /build/reproducible-path/libcarp-assert-more-perl-2.8.0/debian/libcarp-assert-more-perl/usr/share/perl5/Carp/Assert/More.pm
@@ -1129,12 +1165,14 @@
 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/1079017/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1079017/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/834615 and its subdirectories
-I: Current time: Fri Feb 28 14:42:56 -12 2025
-I: pbuilder-time-stamp: 1740796976
+I: removing directory /srv/workspace/pbuilder/1079017 and its subdirectories
+I: Current time: Fri Apr  3 23:06:59 +14 2026
+I: pbuilder-time-stamp: 1775207219