Diff of the two buildlogs:

--
--- b1/build.log	2025-03-08 02:21:42.143620157 +0000
+++ b2/build.log	2025-03-08 02:22:48.652626868 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Mar  7 14:19:38 -12 2025
-I: pbuilder-time-stamp: 1741400378
+I: Current time: Fri Apr 10 22:44:42 +14 2026
+I: pbuilder-time-stamp: 1775810682
 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: applying Sort-source-files-for-deterministic-linking-order.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2783065/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3943407/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-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 Apr 10 08:44 /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/3943407/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3943407/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=20 '
-  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=42 '
+  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='8bcaf9ea76f34b8286cb68258d749076'
-  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='2783065'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=62e340cd81ff48df9fd25bf37b6d71da
+  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=3943407
   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.xQRkM42v/pbuilderrc_a2JY --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.xQRkM42v/b1 --logfile b1/build.log pyephem_4.2-1.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://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.xQRkM42v/pbuilderrc_XZNn --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.xQRkM42v/b2 --logfile b2/build.log pyephem_4.2-1.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://213.165.73.152:3128
 I: uname -a
-  Linux ionos1-amd64 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 6.12.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.12-1~bpo12+1 (2025-02-23) 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/2783065/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3943407/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -186,7 +218,7 @@
 Get: 68 http://deb.debian.org/debian trixie/main amd64 python3-dev amd64 3.13.2-1 [26.1 kB]
 Get: 69 http://deb.debian.org/debian trixie/main amd64 python3-all-dev amd64 3.13.2-1 [1068 B]
 Get: 70 http://deb.debian.org/debian trixie/main amd64 tzdata-legacy all 2025a-2 [178 kB]
-Fetched 37.8 MB in 2s (17.7 MB/s)
+Fetched 37.8 MB in 0s (95.5 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:amd64.
 (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 ... 19800 files and directories currently installed.)
@@ -424,8 +456,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Mar  8 02:20:32 UTC 2025.
-Universal Time is now:  Sat Mar  8 02:20:32 UTC 2025.
+Local time is now:      Fri Apr 10 08:45:15 UTC 2026.
+Universal Time is now:  Fri Apr 10 08:45:15 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -493,7 +525,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/pyephem-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  > ../pyephem_4.2-1_source.changes
+I: user script /srv/workspace/pbuilder/3943407/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3943407/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/pyephem-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  > ../pyephem_4.2-1_source.changes
 dpkg-buildpackage: info: source package pyephem
 dpkg-buildpackage: info: source version 4.2-1
 dpkg-buildpackage: info: source distribution unstable
@@ -600,30 +636,30 @@
 test_never_up (ephem.tests.test_rise_set.RiseSetTests.test_never_up) ... ok
 test_raises_error_for_NaN (ephem.tests.test_rise_set.RiseSetTests.test_raises_error_for_NaN) ... ok
 test_sun (ephem.tests.test_rise_set.RiseSetTests.test_sun) ... ok
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/tutorial.rst
-Doctest: tutorial.rst ... ok
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/toc.rst
-Doctest: toc.rst ... skipped 'all examples were skipped'
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/quick.rst
+Doctest: quick.rst ... ok
 /build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/newton.rst
 Doctest: newton.rst ... ok
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/date.rst
-Doctest: date.rst ... ok
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/rise-set.rst
-Doctest: rise-set.rst ... ok
 /build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/angle.rst
 Doctest: angle.rst ... ok
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/radec.rst
-Doctest: radec.rst ... ok
 /build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/examples.rst
 Doctest: examples.rst ... skipped 'all examples were skipped'
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/CHANGELOG.rst
-Doctest: CHANGELOG.rst ... skipped 'all examples were skipped'
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/toc.rst
+Doctest: toc.rst ... skipped 'all examples were skipped'
 /build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/catalogs.rst
 Doctest: catalogs.rst ... skipped 'all examples were skipped'
-/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/quick.rst
-Doctest: quick.rst ... ok
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/CHANGELOG.rst
+Doctest: CHANGELOG.rst ... skipped 'all examples were skipped'
 /build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/coordinates.rst
 Doctest: coordinates.rst ... ok
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/date.rst
+Doctest: date.rst ... ok
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/rise-set.rst
+Doctest: rise-set.rst ... ok
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/radec.rst
+Doctest: radec.rst ... ok
+/build/reproducible-path/pyephem-4.2/.pybuild/cpython3_3.13_ephem/build/ephem/tests/../doc/tutorial.rst
+Doctest: tutorial.rst ... ok
 test_TLE_checksum (ephem.tests.test_satellite.SatelliteTests.test_TLE_checksum) ... ok
 test_attribute_values_and_roundtrips (ephem.tests.test_satellite.SatelliteTests.test_attribute_values_and_roundtrips) ... ok
 test_more_than_one_year_after_TLE (ephem.tests.test_satellite.SatelliteTests.test_more_than_one_year_after_TLE) ... ok
@@ -717,7 +753,7 @@
 test_equinoxes (ephem.tests.test_usno_equinoxes.UsnoEquinoxesTests.test_equinoxes) ... ok
 
 ----------------------------------------------------------------------
-Ran 177 tests in 2.565s
+Ran 177 tests in 0.964s
 
 OK (skipped=4)
    create-stamp debian/debhelper-build-stamp
@@ -759,8 +795,8 @@
    dh_gencontrol -O--buildsystem=pybuild
    dh_md5sums -O--buildsystem=pybuild
    dh_builddeb -O--buildsystem=pybuild
-dpkg-deb: building package 'python3-ephem-dbgsym' in '../python3-ephem-dbgsym_4.2-1_amd64.deb'.
 dpkg-deb: building package 'python3-ephem' in '../python3-ephem_4.2-1_amd64.deb'.
+dpkg-deb: building package 'python3-ephem-dbgsym' in '../python3-ephem-dbgsym_4.2-1_amd64.deb'.
  dpkg-genbuildinfo --build=binary -O../pyephem_4.2-1_amd64.buildinfo
  dpkg-genchanges --build=binary -O../pyephem_4.2-1_amd64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -768,12 +804,14 @@
 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/3943407/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3943407/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/2783065 and its subdirectories
-I: Current time: Fri Mar  7 14:21:41 -12 2025
-I: pbuilder-time-stamp: 1741400501
+I: removing directory /srv/workspace/pbuilder/3943407 and its subdirectories
+I: Current time: Fri Apr 10 22:45:46 +14 2026
+I: pbuilder-time-stamp: 1775810746