Diff of the two buildlogs:

--
--- b1/build.log	2023-04-24 18:34:51.893821268 +0000
+++ b2/build.log	2023-04-24 18:38:16.932733106 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Apr 24 06:31:50 -12 2023
-I: pbuilder-time-stamp: 1682361110
+I: Current time: Mon May 27 14:57:56 +14 2024
+I: pbuilder-time-stamp: 1716771476
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./erlang-luerl_1.0.orig.tar.gz]
 I: copying [./erlang-luerl_1.0-2.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Mon Dec 20 09:02:12 2021 -12
+gpgv: Signature made Tue Dec 21 11:02:12 2021 +14
 gpgv:                using RSA key 08418BBE44720F2DBAC505ECBA7A2496DAE40D1C
 gpgv:                issuer "debalance@debian.org"
 gpgv: Can't check signature: No public key
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking erlang-luerl_1.0-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/7718/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/6243/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink9-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 May 27 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/6243/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/6243/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build'
-  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]="15" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.15(1)-release'
+  BUILDDIR=/build
+  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=8'
-  DISTRIBUTION='bookworm'
-  HOME='/var/lib/jenkins'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/var/lib/jenkins
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  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='7718'
-  PS1='# '
-  PS2='> '
+  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=6243
   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.jiP71XpR/pbuilderrc_kxNh --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.jiP71XpR/b1 --logfile b1/build.log erlang-luerl_1.0-2.dsc'
-  SUDO_GID='117'
-  SUDO_UID='110'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  USERNAME='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.16:3128'
+  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.jiP71XpR/pbuilderrc_ISJh --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.jiP71XpR/b2 --logfile b2/build.log --extrapackages usrmerge erlang-luerl_1.0-2.dsc'
+  SUDO_GID=117
+  SUDO_UID=110
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  USERNAME=root
+  _='I: set'
+  http_proxy=http://192.168.101.16:3128
 I: uname -a
-  Linux codethink12-arm64 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 24 02:18 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/7718/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 27 10:41 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/6243/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -405,7 +437,7 @@
 Get: 284 http://deb.debian.org/debian bookworm/main arm64 rebar arm64 2.6.4-3 [203 kB]
 Get: 285 http://deb.debian.org/debian bookworm/main arm64 dh-rebar all 0.0.6 [7820 B]
 Get: 286 http://deb.debian.org/debian bookworm/main arm64 erlang-parsetools arm64 1:25.2.3+dfsg-1 [197 kB]
-Fetched 168 MB in 9s (18.8 MB/s)
+Fetched 168 MB in 8s (21.9 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libargon2-1:arm64.
 (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 ... 19616 files and directories currently installed.)
@@ -1585,8 +1617,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/erlang-luerl-1.0/ && 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  > ../erlang-luerl_1.0-2_source.changes
+I: user script /srv/workspace/pbuilder/6243/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/6243/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/erlang-luerl-1.0/ && 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  > ../erlang-luerl_1.0-2_source.changes
 dpkg-buildpackage: info: source package erlang-luerl
 dpkg-buildpackage: info: source version 1:1.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1710,33 +1751,33 @@
 Compiled src/luerl_app.erl
 Compiled src/luerl_comp_peep.erl
 Compiled src/luerl_lib_bit32.erl
-Compiled src/luerl_comp_locf.erl
 Compiled src/luerl_comp_vars.erl
 Compiled src/Elixir.Luerl.erl
 Compiled src/luerl_sandbox.erl
+Compiled src/luerl_comp_locf.erl
 Compiled src/ttsets.erl
 Compiled src/luerl_sup.erl
 Compiled src/luerl_old.erl
+Compiled src/luerl_comp_env.erl
 Compiled src/luerl_lib_basic.erl
 Compiled src/luerl_lib_io.erl
-Compiled src/luerl_comp_env.erl
 Compiled src/luerl_anno.erl
 Compiled src/luerl_lib_package.erl
 Compiled src/luerl_lib_utf8.erl
-Compiled src/luerl_new.erl
 Compiled src/luerl.erl
+Compiled src/luerl_new.erl
 Compiled src/luerl_comp_lint.erl
 Compiled src/luerl_lib_debug.erl
 Compiled src/luerl_emul.erl
 Compiled src/luerl_util.erl
 Compiled src/luerl_lib_math.erl
 Compiled src/luerl_comp_normalise.erl
-Compiled src/luerl_comp_cg.erl
 Compiled src/luerl_lib_table.erl
-Compiled src/luerl_comp.erl
+Compiled src/luerl_heap.erl
+Compiled src/luerl_comp_cg.erl
 Compiled src/luerl_lib_os.erl
+Compiled src/luerl_comp.erl
 Compiled src/luerl_lib_string_format.erl
-Compiled src/luerl_heap.erl
 Compiled src/ttdict.erl
 Compiled src/luerl_lib_string.erl
 DEBUG: Worker exited cleanly
@@ -1787,16 +1828,16 @@
 Compiled src/Elixir.Luerl.New.erl
 Compiled src/luerl_app.erl
 Compiled src/luerl_comp_peep.erl
-Compiled src/luerl_lib_bit32.erl
-Compiled src/luerl_comp_locf.erl
 Compiled src/luerl_comp_vars.erl
-Compiled src/luerl_sandbox.erl
+Compiled src/luerl_lib_bit32.erl
 Compiled src/Elixir.Luerl.erl
-Compiled src/luerl_lib_basic.erl
+Compiled src/luerl_sandbox.erl
 Compiled src/ttsets.erl
+Compiled src/luerl_comp_locf.erl
 Compiled src/luerl_sup.erl
 Compiled src/luerl_old.erl
 Compiled src/luerl_lib_io.erl
+Compiled src/luerl_lib_basic.erl
 Compiled src/luerl_lib_package.erl
 Compiled src/luerl_comp_env.erl
 Compiled src/luerl_anno.erl
@@ -1809,12 +1850,12 @@
 Compiled src/luerl_util.erl
 Compiled src/luerl_lib_math.erl
 Compiled src/luerl_comp_normalise.erl
-Compiled src/luerl_heap.erl
 Compiled src/luerl_comp_cg.erl
 Compiled src/luerl_lib_table.erl
 Compiled src/luerl_comp.erl
-Compiled src/luerl_lib_string_format.erl
+Compiled src/luerl_heap.erl
 Compiled src/luerl_lib_os.erl
+Compiled src/luerl_lib_string_format.erl
 Compiled src/ttdict.erl
 Compiled src/luerl_lib_string.erl
 Compiled test/luerl_return_SUITE.erl
@@ -1830,16 +1871,17 @@
 module 'Elixir.Luerl.New'
 module 'luerl_app'
 module 'luerl_comp_peep'
-module 'luerl_lib_bit32'
-module 'luerl_comp_locf'
 module 'luerl_comp_vars'
-module 'luerl_sandbox'
+module 'luerl_lib_bit32'
 module 'Elixir.Luerl'
-module 'luerl_lib_basic'
+module 'luerl_sandbox'
 module 'ttsets'
+module 'luerl_comp_locf'
 module 'luerl_sup'
+  [done in 0.001 s]
 module 'luerl_old'
 module 'luerl_lib_io'
+module 'luerl_lib_basic'
 module 'luerl_lib_package'
 module 'luerl_comp_env'
 module 'luerl_anno'
@@ -1852,25 +1894,25 @@
 module 'luerl_util'
 module 'luerl_lib_math'
 module 'luerl_comp_normalise'
-module 'luerl_heap'
 module 'luerl_comp_cg'
 module 'luerl_lib_table'
 module 'luerl_comp'
-module 'luerl_lib_string_format'
+module 'luerl_heap'
 module 'luerl_lib_os'
+module 'luerl_lib_string_format'
 module 'ttdict'
 module 'luerl_lib_string'
 module 'luerl_return_SUITE'
 module 'luerl_scan'
 module 'luerl_parse'
 module 'luerl_funcall_tests'
-  luerl_funcall_tests: external_fun_test...[0.012 s] ok
-  luerl_funcall_tests: external_nostate_fun_test...[0.002 s] ok
+  luerl_funcall_tests: external_fun_test...[0.024 s] ok
+  luerl_funcall_tests: external_nostate_fun_test...[0.003 s] ok
   luerl_funcall_tests: return_lib_function_test...[0.001 s] ok
   luerl_funcall_tests: define_fun_in_lua_test...[0.002 s] ok
-  luerl_funcall_tests: define_fun2_in_lua_test...[0.003 s] ok
+  luerl_funcall_tests: define_fun2_in_lua_test...[0.004 s] ok
   luerl_funcall_tests: newindex_metamethod_test...[0.002 s] ok
-  [done in 0.046 s]
+  [done in 0.055 s]
 =======================================================
   All 6 tests passed.
 Cover analysis: /build/erlang-luerl-1.0/.eunit/index.html
@@ -1885,7 +1927,7 @@
 DEBUG: Reconstruct stdlib []
 DEBUG: No processes to kill
 DEBUG: Postdirs: []
-	rm -fr -- /tmp/dh-xdg-rundir-Rs3JNJfd
+	rm -fr -- /tmp/dh-xdg-rundir-4w9GSGgV
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=rebar
    dh_prep -O--buildsystem=rebar
@@ -2007,12 +2049,14 @@
 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/6243/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/6243/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/7718 and its subdirectories
-I: Current time: Mon Apr 24 06:34:50 -12 2023
-I: pbuilder-time-stamp: 1682361290
+I: removing directory /srv/workspace/pbuilder/6243 and its subdirectories
+I: Current time: Mon May 27 15:01:15 +14 2024
+I: pbuilder-time-stamp: 1716771675