Diff of the two buildlogs:

--
--- b1/build.log	2025-01-15 08:35:01.402733064 +0000
+++ b2/build.log	2025-01-15 08:35:25.685620963 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 14 20:33:52 -12 2025
-I: pbuilder-time-stamp: 1736930032
+I: Current time: Wed Feb 18 04:58:04 +14 2026
+I: pbuilder-time-stamp: 1771340284
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -23,54 +23,86 @@
 dpkg-source: info: unpacking libcpan-meta-yaml-perl_0.020-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/17618/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/28221/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos16-i386.
+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 Feb 17 14:58 /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/28221/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/28221/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='i386'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=11 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='i386'
+  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]="i686-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=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=21 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='079233cd70ca45f5937ad1f5c99e96dc'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  LD_LIBRARY_PATH='/usr/lib/libeatmydata'
-  LD_PRELOAD='libeatmydata.so'
-  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='17618'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=ea7216e0836643c99f9dcef13c3cf29b
+  LANG=C
+  LANGUAGE=de_CH:de
+  LC_ALL=C
+  LD_LIBRARY_PATH=/usr/lib/libeatmydata
+  LD_PRELOAD=libeatmydata.so
+  MACHTYPE=i686-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=28221
   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.h52Msq11/pbuilderrc_yj5C --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.h52Msq11/b1 --logfile b1/build.log libcpan-meta-yaml-perl_0.020-1.dsc'
-  SUDO_GID='112'
-  SUDO_UID='107'
-  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.h52Msq11/pbuilderrc_GxBM --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.h52Msq11/b2 --logfile b2/build.log libcpan-meta-yaml-perl_0.020-1.dsc'
+  SUDO_GID=112
+  SUDO_UID=107
+  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 ionos2-i386 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) 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/17618/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/28221/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -139,7 +171,7 @@
 Get: 29 http://deb.debian.org/debian unstable/main i386 po-debconf all 1.0.21+nmu1 [248 kB]
 Get: 30 http://deb.debian.org/debian unstable/main i386 debhelper all 13.23 [919 kB]
 Get: 31 http://deb.debian.org/debian unstable/main i386 libyaml-perl all 1.31-1 [64.8 kB]
-Fetched 20.7 MB in 1s (33.7 MB/s)
+Fetched 20.7 MB in 0s (120 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 ... 19836 files and directories currently installed.)
@@ -278,7 +310,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libcpan-meta-yaml-perl-0.020/ && 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  > ../libcpan-meta-yaml-perl_0.020-1_source.changes
+I: user script /srv/workspace/pbuilder/28221/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/28221/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libcpan-meta-yaml-perl-0.020/ && 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  > ../libcpan-meta-yaml-perl_0.020-1_source.changes
 dpkg-buildpackage: info: source package libcpan-meta-yaml-perl
 dpkg-buildpackage: info: source version 0.020-1
 dpkg-buildpackage: info: source distribution unstable
@@ -300,13 +336,13 @@
 Writing Makefile for CPAN::Meta::YAML
 Writing MYMETA.yml and MYMETA.json
    dh_auto_build
-	make -j11
+	make -j21
 make[1]: Entering directory '/build/reproducible-path/libcpan-meta-yaml-perl-0.020'
 cp lib/CPAN/Meta/YAML.pm blib/lib/CPAN/Meta/YAML.pm
 Manifying 1 pod document
 make[1]: Leaving directory '/build/reproducible-path/libcpan-meta-yaml-perl-0.020'
    dh_auto_test
-	make -j11 test TEST_VERBOSE=1
+	make -j21 test TEST_VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/libcpan-meta-yaml-perl-0.020'
 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
 # 
@@ -901,6 +937,22 @@
 1..3
 ok
 t/31_local_tml.t ....... 
+# Subtest: TestML: t/tml-local/dump-error/circular.tml
+    # Subtest: Circular Reference Protection
+        ok 1 - returned false
+        ok 2 - Got expected error
+        1..2
+    ok 1 - Circular Reference Protection
+    1..1
+ok 1 - TestML: t/tml-local/dump-error/circular.tml
+# Subtest: TestML: t/tml-local/load-warning/document.tml
+    # Subtest: mapping with double key
+        ok 1 - got exactly one warning
+        ok 2 - Got expected warning
+        1..2
+    ok 1 - mapping with double key
+    1..1
+ok 2 - TestML: t/tml-local/load-warning/document.tml
 # Subtest: TestML: t/tml-local/perl-to-yaml/quoting.tml
     # Subtest: Quote boolean-like string (scalar)
         ok 1 - write_string lives
@@ -918,7 +970,7 @@
         1..2
     ok 3 - Quote scalars ending in colon
     1..3
-ok 1 - TestML: t/tml-local/perl-to-yaml/quoting.tml
+ok 3 - TestML: t/tml-local/perl-to-yaml/quoting.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/collection.tml
     # Subtest: null hash in array
         ok 1 - CPAN::Meta::YAML parses without error
@@ -1064,7 +1116,7 @@
         1..10
     ok 11 - colon at end of key
     1..11
-ok 2 - TestML: t/tml-local/yaml-roundtrip/collection.tml
+ok 4 - TestML: t/tml-local/yaml-roundtrip/collection.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/comment.tml
     # Subtest: Properly ignore comments
         ok 1 - CPAN::Meta::YAML parses without error
@@ -1132,7 +1184,7 @@
         1..10
     ok 5 - empty_comment_in_hash
     1..5
-ok 3 - TestML: t/tml-local/yaml-roundtrip/comment.tml
+ok 5 - TestML: t/tml-local/yaml-roundtrip/comment.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/document.tml
     # Subtest: simple_doctype_comment
         ok 1 - CPAN::Meta::YAML parses without error
@@ -1395,7 +1447,7 @@
         1..10
     ok 20 - two_undef
     1..20
-ok 4 - TestML: t/tml-local/yaml-roundtrip/document.tml
+ok 6 - TestML: t/tml-local/yaml-roundtrip/document.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/mapping.tml
     # Subtest: Empty mapping
         ok 1 - CPAN::Meta::YAML parses without error
@@ -1580,7 +1632,7 @@
         1..10
     ok 14 - quoted_empty_key
     1..14
-ok 5 - TestML: t/tml-local/yaml-roundtrip/mapping.tml
+ok 7 - TestML: t/tml-local/yaml-roundtrip/mapping.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/quoting.tml
     # Subtest: Empty double-quote
         ok 1 - CPAN::Meta::YAML parses without error
@@ -1778,7 +1830,7 @@
         1..10
     ok 15 - Single Dash
     1..15
-ok 6 - TestML: t/tml-local/yaml-roundtrip/quoting.tml
+ok 8 - TestML: t/tml-local/yaml-roundtrip/quoting.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/scalar.tml
     # Subtest: one_scalar
         ok 1 - CPAN::Meta::YAML parses without error
@@ -1937,7 +1989,7 @@
         1..10
     ok 12 - Ampersand in a quote
     1..12
-ok 7 - TestML: t/tml-local/yaml-roundtrip/scalar.tml
+ok 9 - TestML: t/tml-local/yaml-roundtrip/scalar.tml
 # Subtest: TestML: t/tml-local/yaml-roundtrip/sequence.tml
     # Subtest: Empty sequence
         ok 1 - CPAN::Meta::YAML parses without error
@@ -2057,23 +2109,7 @@
         1..10
     ok 9 - trailing whitespace
     1..9
-ok 8 - TestML: t/tml-local/yaml-roundtrip/sequence.tml
-# Subtest: TestML: t/tml-local/dump-error/circular.tml
-    # Subtest: Circular Reference Protection
-        ok 1 - returned false
-        ok 2 - Got expected error
-        1..2
-    ok 1 - Circular Reference Protection
-    1..1
-ok 9 - TestML: t/tml-local/dump-error/circular.tml
-# Subtest: TestML: t/tml-local/load-warning/document.tml
-    # Subtest: mapping with double key
-        ok 1 - got exactly one warning
-        ok 2 - Got expected warning
-        1..2
-    ok 1 - mapping with double key
-    1..1
-ok 10 - TestML: t/tml-local/load-warning/document.tml
+ok 10 - TestML: t/tml-local/yaml-roundtrip/sequence.tml
 # Subtest: TestML: t/tml-local/load-error/document.tml
     # Subtest: scalar document followed by mapping
         ok 1 - read_string returns undef
@@ -2365,13 +2401,13 @@
 # '
 ok
 All tests successful.
-Files=13, Tests=58,  6 wallclock secs ( 0.20 usr  0.06 sys +  3.74 cusr  0.26 csys =  4.26 CPU)
+Files=13, Tests=58,  2 wallclock secs ( 0.16 usr  0.02 sys +  1.68 cusr  0.16 csys =  2.02 CPU)
 Result: PASS
 make[1]: Leaving directory '/build/reproducible-path/libcpan-meta-yaml-perl-0.020'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/libcpan-meta-yaml-perl/
-	make -j11 install DESTDIR=/build/reproducible-path/libcpan-meta-yaml-perl-0.020/debian/libcpan-meta-yaml-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
+	make -j21 install DESTDIR=/build/reproducible-path/libcpan-meta-yaml-perl-0.020/debian/libcpan-meta-yaml-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/reproducible-path/libcpan-meta-yaml-perl-0.020'
 Manifying 1 pod document
 Installing /build/reproducible-path/libcpan-meta-yaml-perl-0.020/debian/libcpan-meta-yaml-perl/usr/share/perl5/CPAN/Meta/YAML.pm
@@ -2398,12 +2434,14 @@
 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/28221/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/28221/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/17618 and its subdirectories
-I: Current time: Tue Jan 14 20:34:58 -12 2025
-I: pbuilder-time-stamp: 1736930098
+I: removing directory /srv/workspace/pbuilder/28221 and its subdirectories
+I: Current time: Wed Feb 18 04:58:24 +14 2026
+I: pbuilder-time-stamp: 1771340304