Diff of the two buildlogs:

--
--- b1/build.log	2025-01-21 03:31:36.678299944 +0000
+++ b2/build.log	2025-01-21 03:32:06.384966272 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Jan 20 15:30:52 -12 2025
-I: pbuilder-time-stamp: 1737430252
+I: Current time: Mon Feb 23 23:54:38 +14 2026
+I: pbuilder-time-stamp: 1771840478
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,54 +25,86 @@
 dpkg-source: info: applying proj-no-Alien.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/46044/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/63575/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 23 09:54 /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/63575/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/63575/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='86d68dd9d5f747409c681d200fbf197b'
-  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='46044'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=074732e677224c07954767956e6e5485
+  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=63575
   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.R8iV654E/pbuilderrc_XLME --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.R8iV654E/b1 --logfile b1/build.log libpdl-transform-proj4-perl_2.098-1.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.R8iV654E/pbuilderrc_x7oa --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.R8iV654E/b2 --logfile b2/build.log libpdl-transform-proj4-perl_2.098-1.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 ionos12-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/46044/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/63575/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -238,7 +270,7 @@
 Get: 118 http://deb.debian.org/debian unstable/main i386 libterm-readkey-perl i386 2.38-2+b4 [25.4 kB]
 Get: 119 http://deb.debian.org/debian unstable/main i386 pdl i386 1:2.098-4 [3095 kB]
 Get: 120 http://deb.debian.org/debian unstable/main i386 proj-bin i386 9.5.1-1 [229 kB]
-Fetched 54.6 MB in 1s (39.3 MB/s)
+Fetched 54.6 MB in 0s (126 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 ... 19837 files and directories currently installed.)
@@ -735,7 +767,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libpdl-transform-proj4-perl-2.098/ && 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  > ../libpdl-transform-proj4-perl_2.098-1_source.changes
+I: user script /srv/workspace/pbuilder/63575/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/63575/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libpdl-transform-proj4-perl-2.098/ && 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  > ../libpdl-transform-proj4-perl_2.098-1_source.changes
 dpkg-buildpackage: info: source package libpdl-transform-proj4-perl
 dpkg-buildpackage: info: source version 2.098-1
 dpkg-buildpackage: info: source distribution unstable
@@ -757,7 +793,7 @@
 Generating a Unix-style Makefile
 Writing Makefile for PDL::Transform::Proj4
    dh_auto_build
-	make -j11
+	make -j21
 make[1]: Entering directory '/build/reproducible-path/libpdl-transform-proj4-perl-2.098'
 "/usr/bin/perl" "-I/usr/lib/i386-linux-gnu/perl5/5.40" "-MPDL::PP=PDL::Transform::Proj4,PDL::Transform::Proj4,lib/PDL/Transform/Proj4,,1,1" lib/PDL/Transform/Proj4.pd
 Running Mkbootstrap for lib/PDL/Transform/Proj4 ()
@@ -767,8 +803,8 @@
 "/usr/bin/perl" "/usr/share/perl/5.40/ExtUtils/xsubpp"  -typemap '/usr/share/perl/5.40/ExtUtils/typemap' -typemap '/usr/lib/i386-linux-gnu/perl5/5.40/PDL/Core/typemap' lib/PDL/Transform/Proj4.xs > lib/PDL/Transform/Proj4.xsc
 i686-linux-gnu-gcc -c  "-I/usr/lib/i386-linux-gnu/perl5/5.40/PDL/Core" -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/libpdl-transform-proj4-perl-2.098=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"2.098\" -DXS_VERSION=\"2.098\" -fPIC "-I/usr/lib/i386-linux-gnu/perl/5.40/CORE"   lib/PDL/Transform/Proj4-pp-fwd_transform.c -o lib/PDL/Transform/Proj4-pp-fwd_transform.o
 i686-linux-gnu-gcc -c  "-I/usr/lib/i386-linux-gnu/perl5/5.40/PDL/Core" -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/libpdl-transform-proj4-perl-2.098=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2   -DVERSION=\"2.098\" -DXS_VERSION=\"2.098\" -fPIC "-I/usr/lib/i386-linux-gnu/perl/5.40/CORE"   lib/PDL/Transform/Proj4-pp-inv_transform.c -o lib/PDL/Transform/Proj4-pp-inv_transform.o
-cp lib/PDL/Transform/Proj4.pm blib/lib/PDL/Transform/Proj4.pm
 cp lib/PDL/Demos/Proj4_demo.pm blib/lib/PDL/Demos/Proj4_demo.pm
+cp lib/PDL/Transform/Proj4.pm blib/lib/PDL/Transform/Proj4.pm
 mv lib/PDL/Transform/Proj4.xsc lib/PDL/Transform/Proj4.c
 i686-linux-gnu-gcc -c  "-I/usr/lib/i386-linux-gnu/perl5/5.40/PDL/Core" \
 -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/libpdl-transform-proj4-perl-2.098=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 \
@@ -783,7 +819,7 @@
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/libpdl-transform-proj4-perl-2.098'
 dh_auto_test || echo "Ignoring test failures"
-	make -j11 test TEST_VERBOSE=1
+	make -j21 test TEST_VERBOSE=1
 make[2]: Entering directory '/build/reproducible-path/libpdl-transform-proj4-perl-2.098'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- lib/PDL/Transform/Proj4.bs blib/arch/auto/PDL/Transform/Proj4/Proj4.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
@@ -818,14 +854,14 @@
 1..8
 ok
 All tests successful.
-Files=2, Tests=14,  1 wallclock secs ( 0.02 usr  0.02 sys +  0.52 cusr  0.08 csys =  0.64 CPU)
+Files=2, Tests=14,  1 wallclock secs ( 0.02 usr  0.00 sys +  0.30 cusr  0.04 csys =  0.36 CPU)
 Result: PASS
 make[2]: Leaving directory '/build/reproducible-path/libpdl-transform-proj4-perl-2.098'
 make[1]: Leaving directory '/build/reproducible-path/libpdl-transform-proj4-perl-2.098'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/libpdl-transform-proj4-perl/
-	make -j11 install DESTDIR=/build/reproducible-path/libpdl-transform-proj4-perl-2.098/debian/libpdl-transform-proj4-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
+	make -j21 install DESTDIR=/build/reproducible-path/libpdl-transform-proj4-perl-2.098/debian/libpdl-transform-proj4-perl AM_UPDATE_INFO_DIR=no PREFIX=/usr
 make[1]: Entering directory '/build/reproducible-path/libpdl-transform-proj4-perl-2.098'
 "/usr/bin/perl" -MExtUtils::Command::MM -e 'cp_nonempty' -- lib/PDL/Transform/Proj4.bs blib/arch/auto/PDL/Transform/Proj4/Proj4.bs 644
 Files found in blib/arch: installing files in blib/lib into architecture dependent library tree
@@ -857,8 +893,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'libpdl-transform-proj4-perl-dbgsym' in '../libpdl-transform-proj4-perl-dbgsym_2.098-1_i386.deb'.
 dpkg-deb: building package 'libpdl-transform-proj4-perl' in '../libpdl-transform-proj4-perl_2.098-1_i386.deb'.
+dpkg-deb: building package 'libpdl-transform-proj4-perl-dbgsym' in '../libpdl-transform-proj4-perl-dbgsym_2.098-1_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../libpdl-transform-proj4-perl_2.098-1_i386.buildinfo
  dpkg-genchanges --build=binary -O../libpdl-transform-proj4-perl_2.098-1_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -866,12 +902,14 @@
 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/63575/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/63575/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/46044 and its subdirectories
-I: Current time: Mon Jan 20 15:31:35 -12 2025
-I: pbuilder-time-stamp: 1737430296
+I: removing directory /srv/workspace/pbuilder/63575 and its subdirectories
+I: Current time: Mon Feb 23 23:55:05 +14 2026
+I: pbuilder-time-stamp: 1771840505