Diff of the two buildlogs:

--
--- b1/build.log	2025-03-05 04:14:42.748097668 +0000
+++ b2/build.log	2025-03-05 04:15:27.450062688 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Mar  4 16:13:19 -12 2025
-I: pbuilder-time-stamp: 1741147999
+I: Current time: Wed Apr  8 00:37:44 +14 2026
+I: pbuilder-time-stamp: 1775558264
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -23,54 +23,86 @@
 dpkg-source: info: unpacking bfs_4.0.6-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/37327/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/54413/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos6-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 Apr  7 10:37 /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/54413/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/54413/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='trixie'
-  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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='a6f2903028b24b4685577c6fddf26df9'
-  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='37327'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=45999a34858747ed9ecd97080fb64338
+  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=54413
   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.hUiG2o6F/pbuilderrc_bnmi --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.hUiG2o6F/b1 --logfile b1/build.log bfs_4.0.6-1.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.hUiG2o6F/pbuilderrc_YQ7q --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.hUiG2o6F/b2 --logfile b2/build.log bfs_4.0.6-1.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 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) 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/37327/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/54413/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -154,7 +186,7 @@
 Get: 36 http://deb.debian.org/debian trixie/main i386 libonig-dev i386 6.9.9-1+b1 [95.4 kB]
 Get: 37 http://deb.debian.org/debian trixie/main i386 liburing2 i386 2.9-1 [29.8 kB]
 Get: 38 http://deb.debian.org/debian trixie/main i386 liburing-dev i386 2.9-1 [235 kB]
-Fetched 22.1 MB in 1s (34.5 MB/s)
+Fetched 22.1 MB in 1s (18.3 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 ... 19789 files and directories currently installed.)
@@ -321,7 +353,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/bfs-4.0.6/ && 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  > ../bfs_4.0.6-1_source.changes
+I: user script /srv/workspace/pbuilder/54413/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/54413/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/bfs-4.0.6/ && 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  > ../bfs_4.0.6-1_source.changes
 dpkg-buildpackage: info: source package bfs
 dpkg-buildpackage: info: source version 4.0.6-1
 dpkg-buildpackage: info: source distribution unstable
@@ -331,7 +367,7 @@
  debian/rules clean
 dh clean
    dh_auto_clean
-	make -j11 distclean
+	make -j21 distclean
 make[1]: Entering directory '/build/reproducible-path/bfs-4.0.6'
 [ RM ] bin obj
 [ RM ] gen distcheck-*
@@ -420,7 +456,7 @@
 make[2]: Leaving directory '/build/reproducible-path/bfs-4.0.6'
 make[1]: Leaving directory '/build/reproducible-path/bfs-4.0.6'
    dh_auto_build
-	make -j11
+	make -j21
 make[1]: Entering directory '/build/reproducible-path/bfs-4.0.6'
 [ CC ] src/main.c
 [ CC ] src/alloc.c
@@ -430,19 +466,19 @@
 [ CC ] src/color.c
 [ CC ] src/ctx.c
 [ CC ] src/diag.c
-[ CC ] src/dstring.c
 [ CC ] src/dir.c
 [ CC ] src/eval.c
+[ CC ] src/dstring.c
 [ CC ] src/exec.c
 [ CC ] src/expr.c
 [ CC ] src/fsade.c
 [ CC ] src/ioq.c
-[ CC ] src/mtab.c
 [ CC ] src/opt.c
+[ CC ] src/mtab.c
 [ CC ] src/parse.c
+[ CC ] src/sighook.c
 [ CC ] src/printf.c
 [ CC ] src/pwcache.c
-[ CC ] src/sighook.c
 [ CC ] src/stat.c
 [ CC ] src/thread.c
 [ CC ] src/trie.c
@@ -456,19 +492,19 @@
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/bfs-4.0.6'
 dh_auto_test
-	make -j11 check "TESTSUITEFLAGS=-j11 --verbose" VERBOSE=1
+	make -j21 check "TESTSUITEFLAGS=-j21 --verbose" VERBOSE=1
 make[2]: Entering directory '/build/reproducible-path/bfs-4.0.6'
 [ CC ] tests/xspawnee.c
 [ CC ] tests/mksock.c
 [ CC ] tests/xtouch.c
 [ CC ] tests/alloc.c
-[ CC ] tests/bfstd.c
 [ CC ] tests/bit.c
+[ CC ] tests/bfstd.c
 [ CC ] tests/ioq.c
-[ CC ] tests/list.c
 [ CC ] tests/main.c
-[ CC ] tests/sighook.c
+[ CC ] tests/list.c
 [ CC ] tests/trie.c
+[ CC ] tests/sighook.c
 [ CC ] tests/xspawn.c
 [ CC ] tests/xtime.c
 [ LD ] bin/tests/xspawnee
@@ -477,11 +513,11 @@
 [ LD ] bin/tests/units
 [TEST] bfs
 [TEST] bfs -S dfs
-[TEST] bfs -S eds
 [TEST] bfs -S ids
 [TEST] bfs -j1
-[TEST] bfs -j2
+[TEST] bfs -S eds
 [TEST] bfs -j3
+[TEST] bfs -j2
 [TEST] bfs -s
 [TEST] tests/units
 [PASS] alloc
@@ -499,8 +535,6 @@
 [SKIP]  28 / 530
 [PASS] 502 / 530
 [SKIP]  28 / 530
-[PASS] 501 / 530
-[SKIP]  29 / 530
 [PASS] 502 / 530
 [SKIP]  28 / 530
 [PASS] 502 / 530
@@ -509,12 +543,14 @@
 [SKIP]  28 / 530
 [PASS] 502 / 530
 [SKIP]  28 / 530
+[PASS] 501 / 530
+[SKIP]  29 / 530
 make[2]: Leaving directory '/build/reproducible-path/bfs-4.0.6'
 make[1]: Leaving directory '/build/reproducible-path/bfs-4.0.6'
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/bfs/
-	make -j11 install DESTDIR=/build/reproducible-path/bfs-4.0.6/debian/bfs AM_UPDATE_INFO_DIR=no
+	make -j21 install DESTDIR=/build/reproducible-path/bfs-4.0.6/debian/bfs AM_UPDATE_INFO_DIR=no
 make[1]: Entering directory '/build/reproducible-path/bfs-4.0.6'
 [INST] bin/bfs
 [INST] man/man1/bfs.1
@@ -542,8 +578,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'bfs' in '../bfs_4.0.6-1_i386.deb'.
 dpkg-deb: building package 'bfs-dbgsym' in '../bfs-dbgsym_4.0.6-1_i386.deb'.
+dpkg-deb: building package 'bfs' in '../bfs_4.0.6-1_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../bfs_4.0.6-1_i386.buildinfo
  dpkg-genchanges --build=binary -O../bfs_4.0.6-1_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -551,12 +587,14 @@
 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/54413/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/54413/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/37327 and its subdirectories
-I: Current time: Tue Mar  4 16:14:42 -12 2025
-I: pbuilder-time-stamp: 1741148082
+I: removing directory /srv/workspace/pbuilder/54413 and its subdirectories
+I: Current time: Wed Apr  8 00:38:25 +14 2026
+I: pbuilder-time-stamp: 1775558305