Diff of the two buildlogs:

--
--- b1/build.log	2025-03-10 07:51:13.141228188 +0000
+++ b2/build.log	2025-03-10 07:52:18.630302207 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Mar  9 19:49:43 -12 2025
-I: pbuilder-time-stamp: 1741592983
+I: Current time: Mon Apr 13 04:14:10 +14 2026
+I: pbuilder-time-stamp: 1776003250
 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 erlang-p1-yconf_1.0.17-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/7593/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/21681/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 Apr 12 14:14 /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/21681/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/21681/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='f35e9fd7490844f2a85f84d92ef18db0'
-  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='7593'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=36b4175add38485d9ff1c40a051fd4f7
+  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=21681
   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.fNlVM3Xb/pbuilderrc_GRHY --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.fNlVM3Xb/b1 --logfile b1/build.log erlang-p1-yconf_1.0.17-1.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.fNlVM3Xb/pbuilderrc_Hun6 --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.fNlVM3Xb/b2 --logfile b2/build.log erlang-p1-yconf_1.0.17-1.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/7593/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/21681/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -417,7 +449,7 @@
 Get: 303 http://deb.debian.org/debian trixie/main i386 erlang-p1-utils i386 1.0.26-2 [125 kB]
 Get: 304 http://deb.debian.org/debian trixie/main i386 libyaml-0-2 i386 0.2.5-2 [55.8 kB]
 Get: 305 http://deb.debian.org/debian trixie/main i386 erlang-p1-yaml i386 1.0.37-2 [18.5 kB]
-Fetched 205 MB in 3s (67.5 MB/s)
+Fetched 205 MB in 2s (127 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libsystemd-shared:i386.
 (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 ... 19787 files and directories currently installed.)
@@ -1680,7 +1712,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/erlang-p1-yconf-1.0.17/ && 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-p1-yconf_1.0.17-1_source.changes
+I: user script /srv/workspace/pbuilder/21681/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/21681/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/erlang-p1-yconf-1.0.17/ && 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-p1-yconf_1.0.17-1_source.changes
 dpkg-buildpackage: info: source package erlang-p1-yconf
 dpkg-buildpackage: info: source version 1.0.17-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1900,74 +1936,73 @@
 DEBUG: Worker exited cleanly
 INFO:  Cover compiling /build/reproducible-path/erlang-p1-yconf-1.0.17
 ======================== EUnit ========================
-module 'yconf'
 module 'yconf_test'
-  yconf_test: start_test...[0.027 s] ok
+  yconf_test: start_test...[0.014 s] ok
   yconf_test: validate_test...ok
   yconf_test: error_validate_test...ok
-  yconf_test: empty_yaml_test...[0.007 s] ok
-  yconf_test: bad_yaml_test...[0.003 s] ok
-  yconf_test: define_macro_test...[0.001 s] ok
+  yconf_test: empty_yaml_test...[0.003 s] ok
+  yconf_test: bad_yaml_test...[0.002 s] ok
+  yconf_test: define_macro_test...ok
   yconf_test: include_config_file_test...[0.001 s] ok
-  yconf_test: include_allow_only_test...[0.001 s] ok
-  yconf_test: include_disallow_test...[0.001 s] ok
-  yconf_test: duplicated_macro_test...[0.001 s] ok
-  yconf_test: included_macro_test...[0.001 s] ok
-  yconf_test: nested_macro_test...[0.001 s] ok
-  yconf_test: include_circular_test...[0.001 s] ok
+  yconf_test: include_allow_only_test...ok
+  yconf_test: include_disallow_test...ok
+  yconf_test: duplicated_macro_test...ok
+  yconf_test: included_macro_test...ok
+  yconf_test: nested_macro_test...ok
+  yconf_test: include_circular_test...ok
   yconf_test: macro_circular_test...ok
   yconf_test: any_test...ok
-  yconf_test: enum_atom_test...[0.001 s] ok
-  yconf_test: enum_binary_test...[0.001 s] ok
-  yconf_test: bad_enum_test...[0.001 s] ok
-  yconf_test: bool_test...[0.001 s] ok
+  yconf_test: enum_atom_test...ok
+  yconf_test: enum_binary_test...ok
+  yconf_test: bad_enum_test...ok
+  yconf_test: bool_test...ok
   yconf_test: bad_bool_test...ok
-  yconf_test: int_test...[0.001 s] ok
-  yconf_test: bad_int_test...[0.001 s] ok
-  yconf_test: int_range_test...[0.001 s] ok
-  yconf_test: bad_int_range_test...[0.001 s] ok
+  yconf_test: int_test...ok
+  yconf_test: bad_int_test...ok
+  yconf_test: int_range_test...ok
+  yconf_test: bad_int_range_test...ok
   yconf_test: pos_int_test...ok
-  yconf_test: bad_pos_int_test...[0.001 s] ok
-  yconf_test: pos_int_infinity_test...[0.001 s] ok
+  yconf_test: bad_pos_int_test...ok
+  yconf_test: pos_int_infinity_test...ok
   yconf_test: bad_pos_int_infinity_test...ok
   yconf_test: non_neg_int_test...ok
-  yconf_test: bad_non_neg_int_test...[0.001 s] ok
-  yconf_test: non_neg_int_infinity_test...[0.001 s] ok
-  yconf_test: bad_non_neg_int_infinity_test...[0.001 s] ok
+  yconf_test: bad_non_neg_int_test...ok
+  yconf_test: non_neg_int_infinity_test...ok
+  yconf_test: bad_non_neg_int_infinity_test...ok
   yconf_test: number_test...ok
-  yconf_test: bad_number_test...[0.001 s] ok
+  yconf_test: bad_number_test...ok
   yconf_test: binary_test...ok
   yconf_test: bad_binary_test...ok
   yconf_test: binary_re_test...ok
   yconf_test: bad_binary_re_test...ok
-  yconf_test: base64_test...[0.003 s] ok
+  yconf_test: base64_test...[0.002 s] ok
   yconf_test: bad_base64_test...ok
   yconf_test: atom_test...ok
   yconf_test: bad_atom_test...ok
   yconf_test: bad_atom_length_test...ok
-  yconf_test: string_test...[0.001 s] ok
+  yconf_test: string_test...ok
   yconf_test: bad_string_test...ok
   yconf_test: string_re_test...ok
   yconf_test: bad_string_re_test...ok
-  yconf_test: binary_sep_test...[0.001 s] ok
-  yconf_test: path_test...[0.001 s] ok
+  yconf_test: binary_sep_test...ok
+  yconf_test: path_test...ok
   yconf_test: empty_path_test...ok
-  yconf_test: file_read_test...[0.001 s] ok
+  yconf_test: file_read_test...ok
   yconf_test: bad_file_read_test...ok
-  yconf_test: file_write_test...[0.001 s] ok
+  yconf_test: file_write_test...ok
   yconf_test: bad_file_write_test...[0.001 s] ok
-  yconf_test: directory_read_test...[0.001 s] ok
-  yconf_test: bad_directory_read_test...[0.001 s] ok
-  yconf_test: directory_write_test...[0.001 s] ok
-  yconf_test: bad_directory_write_test...[0.001 s] ok
-  yconf_test: url_test...[0.004 s] ok
+  yconf_test: directory_read_test...ok
+  yconf_test: bad_directory_read_test...ok
+  yconf_test: directory_write_test...ok
+  yconf_test: bad_directory_write_test...ok
+  yconf_test: url_test...[0.003 s] ok
   yconf_test: url_any_test...ok
   yconf_test: bad_url_scheme_test...ok
   yconf_test: bad_url_host_test...ok
   yconf_test: bad_url_test...ok
   yconf_test: octal_test...ok
-  yconf_test: bad_octal_test...[0.001 s] ok
-  yconf_test: ipv4_test...[0.001 s] ok
+  yconf_test: bad_octal_test...ok
+  yconf_test: ipv4_test...ok
   yconf_test: bad_ipv4_test...ok
   yconf_test: ipv6_test...ok
   yconf_test: bad_ipv6_test...ok
@@ -1976,13 +2011,13 @@
   yconf_test: ip_mask_test...ok
   yconf_test: bad_ip_mask_test...ok
   yconf_test: port_test...ok
-  yconf_test: timeout_test...[0.003 s] ok
+  yconf_test: timeout_test...[0.002 s] ok
   yconf_test: timeout_atom_test...ok
-  yconf_test: timeout_format_test...[0.001 s] ok
+  yconf_test: timeout_format_test...ok
   yconf_test: timeout_infinity_test...ok
   yconf_test: bad_timeout_test...ok
-  yconf_test: bad_timeout_zero_test...[0.001 s] ok
-  yconf_test: bad_timeout_infinity_test...[0.001 s] ok
+  yconf_test: bad_timeout_zero_test...ok
+  yconf_test: bad_timeout_infinity_test...ok
   yconf_test: bad_timeout_unit_test...ok
   yconf_test: bad_timeout_min_test...ok
   yconf_test: bad_timeout_negative_test...ok
@@ -1991,7 +2026,7 @@
   yconf_test: glob_test...ok
   yconf_test: bad_glob_test...ok
   yconf_test: beam_test...ok
-  yconf_test: bad_beam_test...[0.007 s] ok
+  yconf_test: bad_beam_test...[0.003 s] ok
   yconf_test: non_empty_test...ok
   yconf_test: empty_atom_test...ok
   yconf_test: empty_binary_test...ok
@@ -2003,27 +2038,27 @@
   yconf_test: bad_sorted_list_test...ok
   yconf_test: unique_list_test...ok
   yconf_test: bad_unique_list_test...[0.001 s] ok
-  yconf_test: list_or_single_test...[0.001 s] ok
-  yconf_test: sorted_list_or_single_test...[0.001 s] ok
-  yconf_test: unique_list_or_single_test...[0.001 s] ok
-  yconf_test: bad_unique_list_or_single_test...[0.001 s] ok
-  yconf_test: map_test...[0.001 s] ok
-  yconf_test: bad_map_test...[0.001 s] ok
+  yconf_test: list_or_single_test...ok
+  yconf_test: sorted_list_or_single_test...ok
+  yconf_test: unique_list_or_single_test...ok
+  yconf_test: bad_unique_list_or_single_test...ok
+  yconf_test: map_test...ok
+  yconf_test: bad_map_test...ok
   yconf_test: bad_unique_map_test...ok
   yconf_test: either_test...ok
   yconf_test: either_atom_test...ok
-  yconf_test: and_then_test...[0.001 s] ok
+  yconf_test: and_then_test...ok
   yconf_test: options_test...ok
   yconf_test: options_return_map_test...ok
   yconf_test: options_return_dict_test...ok
   yconf_test: options_return_orddict_test...ok
   yconf_test: options_default_validator_test...ok
-  yconf_test: bad_options_test...[0.001 s] ok
-  yconf_test: bad_binary_map_option_test...[0.001 s] ok
+  yconf_test: bad_options_test...ok
+  yconf_test: bad_binary_map_option_test...ok
   yconf_test: bad_integer_map_option_test...ok
   yconf_test: unknown_option_test...ok
   yconf_test: missing_option_test...ok
-  yconf_test: disallowed_option_test...[0.001 s] ok
+  yconf_test: disallowed_option_test...ok
   yconf_test: unknown_option_with_disallowed_test...ok
   yconf_test: duplicated_option_test...ok
   yconf_test: duplicated_unknown_option_test...ok
@@ -2031,15 +2066,16 @@
   yconf_test: unknown_reason_test...ok
   yconf_test: unicode_test...ok
   yconf_test: stop_test...ok
-  [done in 0.493 s]
+  [done in 0.420 s]
+module 'yconf'
 =======================================================
   All 129 tests passed.
 Cover analysis: /build/reproducible-path/erlang-p1-yconf-1.0.17/.eunit/index.html
 Coverdata export: /build/reproducible-path/erlang-p1-yconf-1.0.17/.eunit/cover.coverdata
-DEBUG: Reconstruct compiler []
 DEBUG: Reconstruct stdlib []
 DEBUG: Reconstruct rebar []
 DEBUG: Reconstruct crypto [{fips_mode,false},{rand_cache_size,896}]
+DEBUG: Reconstruct compiler []
 DEBUG: Reconstruct fast_yaml []
 DEBUG: Reconstruct kernel [{logger_level,notice},
                            {logger_sasl_compatible,false},
@@ -2100,7 +2136,7 @@
                             {fullsweep_after,65535},
                             {minor_gcs,1}]},
                        {suspending,[]}]
-=INFO REPORT==== 10-Mar-2025::07:51:00.889953 ===
+=INFO REPORT==== 12-Apr-2026::14:15:05.732108 ===
     application: p1_utils
     exited: killed
     type: temporary
@@ -2182,7 +2218,7 @@
                             {fullsweep_after,65535},
                             {minor_gcs,1}]},
                        {suspending,[]}]
-=INFO REPORT==== 10-Mar-2025::07:51:00.891906 ===
+=INFO REPORT==== 12-Apr-2026::14:15:05.733245 ===
     application: fast_yaml
     exited: killed
     type: temporary
@@ -2215,7 +2251,7 @@
                             {minor_gcs,1}]},
                        {suspending,[]}]
 DEBUG: Postdirs: []
-	rm -fr -- /tmp/dh-xdg-rundir-pHf_UbqK
+	rm -fr -- /tmp/dh-xdg-rundir-DNkj6Fjd
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=rebar
    dh_prep -O--buildsystem=rebar
@@ -2337,12 +2373,14 @@
 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/21681/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/21681/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/7593 and its subdirectories
-I: Current time: Sun Mar  9 19:51:12 -12 2025
-I: pbuilder-time-stamp: 1741593072
+I: removing directory /srv/workspace/pbuilder/21681 and its subdirectories
+I: Current time: Mon Apr 13 04:15:13 +14 2026
+I: pbuilder-time-stamp: 1776003313