Diff of the two buildlogs:

--
--- b1/build.log	2024-12-19 01:12:28.997802961 +0000
+++ b2/build.log	2024-12-19 01:13:16.471651572 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 20 19:33:35 -12 2026
-I: pbuilder-time-stamp: 1768980815
+I: Current time: Thu Dec 19 15:12:31 +14 2024
+I: pbuilder-time-stamp: 1734570751
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking libmsv_1.1.1-4.1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2045655/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/4183133/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-arm64.
+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 Dec 19 01:12 /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/4183133/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/4183133/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='25eee84c1c0e45ce987101f123b8c40c'
-  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='2045655'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=64a6c3018fd34d8aabec61ca2c4f082a
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=4183133
   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.ZHOmdr8n/pbuilderrc_rOjv --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.ZHOmdr8n/b1 --logfile b1/build.log libmsv_1.1.1-4.1.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.ZHOmdr8n/pbuilderrc_keRA --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.ZHOmdr8n/b2 --logfile b2/build.log libmsv_1.1.1-4.1.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink03-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2045655/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/4183133/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -187,7 +219,7 @@
 Get: 71 http://deb.debian.org/debian unstable/main arm64 libzstd-dev arm64 1.5.6+dfsg-1+b1 [329 kB]
 Get: 72 http://deb.debian.org/debian unstable/main arm64 libcurl4-gnutls-dev arm64 8.11.1-1 [461 kB]
 Get: 73 http://deb.debian.org/debian unstable/main arm64 libjansson-dev arm64 2.14-2+b3 [43.6 kB]
-Fetched 82.4 MB in 1s (67.6 MB/s)
+Fetched 82.4 MB in 0s (216 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libmagic-mgc.
 (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 ... 20085 files and directories currently installed.)
@@ -493,7 +525,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libmsv-1.1.1/ && 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  > ../libmsv_1.1.1-4.1_source.changes
+I: user script /srv/workspace/pbuilder/4183133/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/4183133/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libmsv-1.1.1/ && 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  > ../libmsv_1.1.1-4.1_source.changes
 dpkg-buildpackage: info: source package libmsv
 dpkg-buildpackage: info: source version 1.1.1-4.1
 dpkg-buildpackage: info: source distribution unstable
@@ -615,11 +651,11 @@
 make[1]: Entering directory '/build/reproducible-path/libmsv-1.1.1'
 /usr/bin/make  all-am
 make[2]: Entering directory '/build/reproducible-path/libmsv-1.1.1'
-/bin/bash ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libmsv-1.1.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -MT msv.lo -MD -MP -MF .deps/msv.Tpo -c -o msv.lo msv.c
+/bin/sh ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libmsv-1.1.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -MT msv.lo -MD -MP -MF .deps/msv.Tpo -c -o msv.lo msv.c
 libtool: compile:  gcc -DHAVE_CONFIG_H -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libmsv-1.1.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -MT msv.lo -MD -MP -MF .deps/msv.Tpo -c msv.c  -fPIC -DPIC -o .libs/msv.o
 libtool: compile:  gcc -DHAVE_CONFIG_H -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libmsv-1.1.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -MT msv.lo -MD -MP -MF .deps/msv.Tpo -c msv.c -o msv.o >/dev/null 2>&1
 mv -f .deps/msv.Tpo .deps/msv.Plo
-/bin/bash ./libtool  --tag=CC   --mode=link gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libmsv-1.1.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -version-info 1:1:0 -Wl,--version-script=./lib/libmsv.map -Wl,-z,relro -o libmsv.la -rpath /usr/lib msv.lo  -ljansson -lcurl 
+/bin/sh ./libtool  --tag=CC   --mode=link gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/libmsv-1.1.1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -version-info 1:1:0 -Wl,--version-script=./lib/libmsv.map -Wl,-z,relro -o libmsv.la -rpath /usr/lib msv.lo  -ljansson -lcurl 
 libtool: link: gcc -shared  -fPIC -DPIC  .libs/msv.o   -ljansson -lcurl  -g -O2 -fstack-protector-strong -mbranch-protection=standard -Wl,--version-script=./lib/libmsv.map -Wl,-z -Wl,relro   -Wl,-soname -Wl,libmsv.so.1 -o .libs/libmsv.so.1.0.1
 libtool: link: (cd ".libs" && rm -f "libmsv.so.1" && ln -s "libmsv.so.1.0.1" "libmsv.so.1")
 libtool: link: (cd ".libs" && rm -f "libmsv.so" && ln -s "libmsv.so.1.0.1" "libmsv.so")
@@ -780,7 +816,7 @@
 make[1]: Entering directory '/build/reproducible-path/libmsv-1.1.1'
 make[2]: Entering directory '/build/reproducible-path/libmsv-1.1.1'
  /usr/bin/mkdir -p '/build/reproducible-path/libmsv-1.1.1/debian/libmsv1/usr/lib'
- /bin/bash ./libtool   --mode=install /usr/bin/install -c   libmsv.la '/build/reproducible-path/libmsv-1.1.1/debian/libmsv1/usr/lib'
+ /bin/sh ./libtool   --mode=install /usr/bin/install -c   libmsv.la '/build/reproducible-path/libmsv-1.1.1/debian/libmsv1/usr/lib'
 libtool: install: /usr/bin/install -c .libs/libmsv.so.1.0.1 /build/reproducible-path/libmsv-1.1.1/debian/libmsv1/usr/lib/libmsv.so.1.0.1
 libtool: install: (cd /build/reproducible-path/libmsv-1.1.1/debian/libmsv1/usr/lib && { ln -s -f libmsv.so.1.0.1 libmsv.so.1 || { rm -f libmsv.so.1 && ln -s libmsv.so.1.0.1 libmsv.so.1; }; })
 libtool: install: (cd /build/reproducible-path/libmsv-1.1.1/debian/libmsv1/usr/lib && { ln -s -f libmsv.so.1.0.1 libmsv.so || { rm -f libmsv.so && ln -s libmsv.so.1.0.1 libmsv.so; }; })
@@ -842,12 +878,14 @@
 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/4183133/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/4183133/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/2045655 and its subdirectories
-I: Current time: Tue Jan 20 19:35:26 -12 2026
-I: pbuilder-time-stamp: 1768980926
+I: removing directory /srv/workspace/pbuilder/4183133 and its subdirectories
+I: Current time: Thu Dec 19 15:13:15 +14 2024
+I: pbuilder-time-stamp: 1734570795