Diff of the two buildlogs:

--
--- b1/build.log	2024-12-18 15:42:17.147203666 +0000
+++ b2/build.log	2024-12-18 15:47:02.258280918 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 20 10:04:34 -12 2026
-I: pbuilder-time-stamp: 1768946674
+I: Current time: Thu Dec 19 05:42:20 +14 2024
+I: pbuilder-time-stamp: 1734536540
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -27,52 +27,84 @@
 dpkg-source: info: applying 0001-remove-screenshot.diff
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1756424/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/1113271/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos1-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 Dec 18 15:42 /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/1113271/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/1113271/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]="37" [3]="1" [4]="release" [5]="x86_64-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=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='3c8090bced684fb1bef1da88d1f59db6'
-  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='1756424'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=33aa9c5dcbbc4e238c1ce27fddcd98b6
+  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=1113271
   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.7TzfMJiZ/pbuilderrc_tOL2 --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.7TzfMJiZ/b1 --logfile b1/build.log elfeed_3.4.2-3.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.7TzfMJiZ/pbuilderrc_8Pr5 --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.7TzfMJiZ/b2 --logfile b2/build.log elfeed_3.4.2-3.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  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 6.11.5+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.11.5-1~bpo12+1 (2024-11-11) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1756424/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/1113271/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -200,7 +232,7 @@
 Get: 88 http://deb.debian.org/debian trixie/main amd64 libtext-glob-perl all 0.11-3 [7676 B]
 Get: 89 http://deb.debian.org/debian trixie/main amd64 libfile-find-rule-perl all 0.34-3 [26.6 kB]
 Get: 90 http://deb.debian.org/debian trixie/main amd64 dh-elpa all 2.1.5 [29.7 kB]
-Fetched 76.1 MB in 1s (122 MB/s)
+Fetched 76.1 MB in 5s (16.7 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package netbase.
 (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 ... 19959 files and directories currently installed.)
@@ -590,7 +622,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/elfeed-3.4.2/ && 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  > ../elfeed_3.4.2-3_source.changes
+I: user script /srv/workspace/pbuilder/1113271/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/1113271/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/elfeed-3.4.2/ && 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  > ../elfeed_3.4.2-3_source.changes
 dpkg-buildpackage: info: source package elfeed
 dpkg-buildpackage: info: source version 3.4.2-3
 dpkg-buildpackage: info: source distribution unstable
@@ -600,7 +636,7 @@
  debian/rules clean
 dh clean --with elpa
    dh_auto_clean
-	make -j42 clean
+	make -j20 clean
 make[1]: Entering directory '/build/reproducible-path/elfeed-3.4.2'
 rm -f *.tar elfeed-csv.elc elfeed-curl.elc elfeed-db.elc elfeed-lib.elc elfeed-log.elc elfeed-show.elc elfeed.elc xml-query.elc elfeed-search.elc elfeed-link.elc tests/elfeed-db-tests.elc tests/elfeed-lib-tests.elc tests/elfeed-tests.elc tests/elfeed-search-tests.elc tests/elfeed-curl-tests.elc tests/xml-query-tests.elc
 make[1]: Leaving directory '/build/reproducible-path/elfeed-3.4.2'
@@ -635,48 +671,48 @@
 emacs -batch -Q -L . -L tests -f batch-byte-compile tests/elfeed-curl-tests.el
 emacs -batch -Q -L . -L tests -f batch-byte-compile tests/elfeed-tests.el
 emacs -batch -Q -L . -L tests -l tests/elfeed-tests.elc -f ert-run-tests-batch
-Running 39 tests (2026-01-20 22:05:12+0000, selector `t')
-   passed   1/39  elfeed-autotags (0.001424 sec)
-   passed   2/39  elfeed-clamp (0.000080 sec)
-   passed   3/39  elfeed-cleanup (0.000092 sec)
-   passed   4/39  elfeed-curl--protocol-type (0.000181 sec)
-   passed   5/39  elfeed-db-dates (0.028825 sec)
-   passed   6/39  elfeed-db-feed-entries (0.001906 sec)
-   passed   7/39  elfeed-db-merge (0.000437 sec)
-   passed   8/39  elfeed-db-meta (0.000408 sec)
-   passed   9/39  elfeed-db-size (0.011598 sec)
-   passed  10/39  elfeed-db-tag (0.000466 sec)
-   passed  11/39  elfeed-db-visit (0.007225 sec)
-   passed  12/39  elfeed-directory-empty-p (0.001005 sec)
-   passed  13/39  elfeed-entries-from-x (0.006020 sec)
-   passed  14/39  elfeed-feed-type (0.001130 sec)
-   passed  15/39  elfeed-float-time (0.001118 sec)
-   passed  16/39  elfeed-format-column (0.000090 sec)
-   passed  17/39  elfeed-goto-line (0.000085 sec)
-   passed  18/39  elfeed-keyword->symbol (0.000063 sec)
-   passed  19/39  elfeed-kill-line (0.000081 sec)
-   passed  20/39  elfeed-looks-like-url-p (0.000147 sec)
-   passed  21/39  elfeed-move-to-first-empty-line (0.000092 sec)
-   passed  22/39  elfeed-opml (0.009823 sec)
-   passed  23/39  elfeed-parse-filter-time-durations (0.192315 sec)
-   passed  24/39  elfeed-protocol-relative-url (0.002563 sec)
-   passed  25/39  elfeed-readable-p (0.000154 sec)
-   passed  26/39  elfeed-ref (0.012612 sec)
-   passed  27/39  elfeed-ref-pack (0.049238 sec)
-   passed  28/39  elfeed-resize-vector (0.000089 sec)
-   passed  29/39  elfeed-search-compile-filter (0.170118 sec)
-   passed  30/39  elfeed-search-unparse-filter (0.000093 sec)
-   passed  31/39  elfeed-slurp-spit (0.001670 sec)
-   passed  32/39  elfeed-tagger (0.000554 sec)
-   passed  33/39  elfeed-time-duration (0.000177 sec)
-   passed  34/39  elfeed-time-duration-absolute (0.000233 sec)
-   passed  35/39  elfeed-update-location (0.000493 sec)
-   passed  36/39  elfeed-valid-regexp-p (0.000087 sec)
-   passed  37/39  elfeed-xml-base (0.001157 sec)
-   passed  38/39  elfeed-xml-parse-region (0.012362 sec)
-   passed  39/39  xml-query (0.000240 sec)
+Running 39 tests (2024-12-18 15:46:30+0000, selector `t')
+   passed   1/39  elfeed-autotags (0.024782 sec)
+   passed   2/39  elfeed-clamp (0.000129 sec)
+   passed   3/39  elfeed-cleanup (0.000458 sec)
+   passed   4/39  elfeed-curl--protocol-type (0.000363 sec)
+   passed   5/39  elfeed-db-dates (0.394436 sec)
+   passed   6/39  elfeed-db-feed-entries (0.032648 sec)
+   passed   7/39  elfeed-db-merge (0.027192 sec)
+   passed   8/39  elfeed-db-meta (0.023164 sec)
+   passed   9/39  elfeed-db-size (0.140271 sec)
+   passed  10/39  elfeed-db-tag (0.002076 sec)
+   passed  11/39  elfeed-db-visit (0.083436 sec)
+   passed  12/39  elfeed-directory-empty-p (0.010730 sec)
+   passed  13/39  elfeed-entries-from-x (0.066261 sec)
+   passed  14/39  elfeed-feed-type (0.003325 sec)
+   passed  15/39  elfeed-float-time (0.003448 sec)
+   passed  16/39  elfeed-format-column (0.000577 sec)
+   passed  17/39  elfeed-goto-line (0.000553 sec)
+   passed  18/39  elfeed-keyword->symbol (0.000116 sec)
+   passed  19/39  elfeed-kill-line (0.000135 sec)
+   passed  20/39  elfeed-looks-like-url-p (0.000245 sec)
+   passed  21/39  elfeed-move-to-first-empty-line (0.000133 sec)
+   passed  22/39  elfeed-opml (0.210455 sec)
+   passed  23/39  elfeed-parse-filter-time-durations (1.777824 sec)
+   passed  24/39  elfeed-protocol-relative-url (0.017944 sec)
+   passed  25/39  elfeed-readable-p (0.002213 sec)
+   passed  26/39  elfeed-ref (0.096922 sec)
+   passed  27/39  elfeed-ref-pack (1.438726 sec)
+   passed  28/39  elfeed-resize-vector (0.000114 sec)
+   passed  29/39  elfeed-search-compile-filter (1.581398 sec)
+   passed  30/39  elfeed-search-unparse-filter (0.000115 sec)
+   passed  31/39  elfeed-slurp-spit (0.019319 sec)
+   passed  32/39  elfeed-tagger (0.008894 sec)
+   passed  33/39  elfeed-time-duration (0.000203 sec)
+   passed  34/39  elfeed-time-duration-absolute (0.000382 sec)
+   passed  35/39  elfeed-update-location (0.000767 sec)
+   passed  36/39  elfeed-valid-regexp-p (0.000133 sec)
+   passed  37/39  elfeed-xml-base (0.015187 sec)
+   passed  38/39  elfeed-xml-parse-region (0.124495 sec)
+   passed  39/39  xml-query (0.000749 sec)
 
-Ran 39 tests, 39 results as expected, 0 unexpected (2026-01-20 22:05:12+0000, 0.519026 sec)
+Ran 39 tests, 39 results as expected, 0 unexpected (2024-12-18 15:46:36+0000, 6.268162 sec)
 
 make[2]: Leaving directory '/build/reproducible-path/elfeed-3.4.2'
 make[1]: Leaving directory '/build/reproducible-path/elfeed-3.4.2'
@@ -700,8 +736,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'elpa-elfeed' in '../elpa-elfeed_3.4.2-3_all.deb'.
 dpkg-deb: building package 'elpa-elfeed-web' in '../elpa-elfeed-web_3.4.2-3_all.deb'.
+dpkg-deb: building package 'elpa-elfeed' in '../elpa-elfeed_3.4.2-3_all.deb'.
  dpkg-genbuildinfo --build=binary -O../elfeed_3.4.2-3_amd64.buildinfo
  dpkg-genchanges --build=binary -O../elfeed_3.4.2-3_amd64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -709,12 +745,14 @@
 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/1113271/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1113271/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/1756424 and its subdirectories
-I: Current time: Tue Jan 20 10:05:16 -12 2026
-I: pbuilder-time-stamp: 1768946716
+I: removing directory /srv/workspace/pbuilder/1113271 and its subdirectories
+I: Current time: Thu Dec 19 05:47:01 +14 2024
+I: pbuilder-time-stamp: 1734536821