Diff of the two buildlogs:

--
--- b1/build.log	2024-05-05 23:19:24.112216959 +0000
+++ b2/build.log	2024-05-05 23:21:16.843417995 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Jun  7 17:41:18 -12 2025
-I: pbuilder-time-stamp: 1749361278
+I: Current time: Mon May  6 13:19:26 +14 2024
+I: pbuilder-time-stamp: 1714951166
 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 bruteforce-luks_1.4.0-4.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1428153/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2897801/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos11-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 May  5 23:19 /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/2897801/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2897801/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=42 '
-  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=20 '
+  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='33b0abd6c10747018834d9e2928f63cb'
-  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='1428153'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=12fbf1c7274244169e96a7db2ce77c4c
+  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=2897801
   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.0n03SCik/pbuilderrc_MtZj --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.0n03SCik/b1 --logfile b1/build.log bruteforce-luks_1.4.0-4.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.0n03SCik/pbuilderrc_wSBq --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.0n03SCik/b2 --logfile b2/build.log bruteforce-luks_1.4.0-4.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos5-amd64 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1 (2024-02-15) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-20-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.85-1 (2024-04-11) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun  7 17:46 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1428153/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May  3 08:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2897801/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -156,7 +188,7 @@
 Get: 46 http://deb.debian.org/debian trixie/main amd64 libjson-c-dev amd64 0.17-1+b1 [73.0 kB]
 Get: 47 http://deb.debian.org/debian trixie/main amd64 libssl-dev amd64 3.2.1-3 [2699 kB]
 Get: 48 http://deb.debian.org/debian trixie/main amd64 libcryptsetup-dev amd64 2:2.7.2-2 [45.0 kB]
-Fetched 24.5 MB in 1s (36.5 MB/s)
+Fetched 24.5 MB in 2s (10.4 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%
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(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
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(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 ... 19694 files and directories currently installed.)
@@ -363,7 +395,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/bruteforce-luks-1.4.0/ && 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  > ../bruteforce-luks_1.4.0-4_source.changes
+I: user script /srv/workspace/pbuilder/2897801/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/2897801/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/bruteforce-luks-1.4.0/ && 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  > ../bruteforce-luks_1.4.0-4_source.changes
 dpkg-buildpackage: info: source package bruteforce-luks
 dpkg-buildpackage: info: source version 1.4.0-4
 dpkg-buildpackage: info: source distribution unstable
@@ -453,7 +489,7 @@
 config.status: creating Makefile
 config.status: executing depfiles commands
    dh_auto_build
-	make -j42
+	make -j20
 make[1]: Entering directory '/build/reproducible-path/bruteforce-luks-1.4.0'
 gcc -DPACKAGE_NAME=\"bruteforce-luks\" -DPACKAGE_TARNAME=\"bruteforce-luks\" -DPACKAGE_VERSION=\"1.4.0\" -DPACKAGE_STRING=\"bruteforce-luks\ 1.4.0\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"bruteforce-luks\" -DVERSION=\"1.4.0\" -DHAVE_STDIO_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_STRINGS_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_UNISTD_H=1 -DSTDC_HEADERS=1 -DHAVE_CTYPE_H=1 -DHAVE_ERRNO_H=1 -DHAVE_LOCALE_H=1 -DHAVE_MATH_H=1 -DHAVE_SIGNAL_H=1 -DHAVE_STDIO_H=1 -DHAVE_STDLIB_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_TIME_H=1 -DHAVE_UNISTD_H=1 -DHAVE_WCHAR_H=1 -DHAVE_CALLOC=1 -DHAVE_MALLOC=1 -DHAVE_REALLOC=1 -DHAVE_FREE=1 -DHAVE_PERROR=1 -DHAVE_PRINTF=1 -DHAVE_FPRINTF=1 -DHAVE_SNPRINTF=1 -DHAVE_FOPEN=1 -DHAVE_FGETC=1 -DHAVE_ATOI=1 -DHAVE_SETLOCALE=1 -DHAVE_MBSTOWCS=1 -DHAVE_WCSNCPY=1 -DHAVE_WCSTOMBS=1 -DHAVE_GETOPT=1 -DHAVE_SIGNAL=1 -DHAVE_LOCALTIME=1 -DHAVE_SETITIMER=1 -DHAVE_STRFTIME=1 -DHAVE_TIME=1 -DHAVE_LIBM=1 -DHAVE_LIBPTHREAD=1 -DHAVE_PTHREAD_H=1 -DHAVE_LIBCRYPTSETUP=1 -DHAVE_LIBCRYPTSETUP_H=1 -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/bruteforce-luks-1.4.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o src/bruteforce-luks.o src/bruteforce-luks.c
 gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/bruteforce-luks-1.4.0=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection  -Wl,-z,relro -Wl,-z,now -o bruteforce-luks src/bruteforce-luks.o  -lcryptsetup -lpthread -lm 
@@ -462,7 +498,7 @@
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/bruteforce-luks/
-	make -j42 install DESTDIR=/build/reproducible-path/bruteforce-luks-1.4.0/debian/bruteforce-luks AM_UPDATE_INFO_DIR=no
+	make -j20 install DESTDIR=/build/reproducible-path/bruteforce-luks-1.4.0/debian/bruteforce-luks AM_UPDATE_INFO_DIR=no
 make[1]: Entering directory '/build/reproducible-path/bruteforce-luks-1.4.0'
 make[2]: Entering directory '/build/reproducible-path/bruteforce-luks-1.4.0'
  /usr/bin/mkdir -p '/build/reproducible-path/bruteforce-luks-1.4.0/debian/bruteforce-luks/usr/bin'
@@ -497,12 +533,14 @@
 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/2897801/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2897801/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/1428153 and its subdirectories
-I: Current time: Sat Jun  7 17:42:22 -12 2025
-I: pbuilder-time-stamp: 1749361342
+I: removing directory /srv/workspace/pbuilder/2897801 and its subdirectories
+I: Current time: Mon May  6 13:21:16 +14 2024
+I: pbuilder-time-stamp: 1714951276