Diff of the two buildlogs:

--
--- b1/build.log	2025-01-21 13:11:17.532220260 +0000
+++ b2/build.log	2025-01-21 13:13:20.082712631 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jan 21 01:06:00 -12 2025
-I: pbuilder-time-stamp: 1737464760
+I: Current time: Tue Feb 24 09:34:23 +14 2026
+I: pbuilder-time-stamp: 1771875263
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -26,54 +26,86 @@
 dpkg-source: info: applying fix_boost_linkage.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/19197/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/54292/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos6-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 Feb 23 19:34 /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/54292/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/54292/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='d4ec590552974d18806038d63da45af1'
-  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='19197'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d871cb1dcfb34e38b5a09ceccf950e00
+  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=54292
   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.MMtaCTab/pbuilderrc_7OSZ --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.MMtaCTab/b1 --logfile b1/build.log python-freecontact_1.1-9.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.MMtaCTab/pbuilderrc_uWd4 --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.MMtaCTab/b2 --logfile b2/build.log python-freecontact_1.1-9.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 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) 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/19197/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/54292/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -213,7 +245,7 @@
 Get: 92 http://deb.debian.org/debian trixie/main i386 python3-all i386 3.12.8-1 [1048 B]
 Get: 93 http://deb.debian.org/debian trixie/main i386 python3.13-dev i386 3.13.1-3 [505 kB]
 Get: 94 http://deb.debian.org/debian trixie/main i386 python3-all-dev i386 3.12.8-1 [1072 B]
-Fetched 66.9 MB in 2s (36.4 MB/s)
+Fetched 66.9 MB in 1s (126 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.12-minimal: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 ... 19842 files and directories currently installed.)
@@ -531,8 +563,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Jan 21 13:07:29 UTC 2025.
-Universal Time is now:  Tue Jan 21 13:07:29 UTC 2025.
+Local time is now:      Mon Feb 23 19:34:48 UTC 2026.
+Universal Time is now:  Mon Feb 23 19:34:48 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libpython3.13-minimal:i386 (3.13.1-3) ...
@@ -620,7 +652,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/python-freecontact-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  > ../python-freecontact_1.1-9_source.changes
+I: user script /srv/workspace/pbuilder/54292/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/54292/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/python-freecontact-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  > ../python-freecontact_1.1-9_source.changes
 dpkg-buildpackage: info: source package python-freecontact
 dpkg-buildpackage: info: source version 1.1-9
 dpkg-buildpackage: info: source distribution unstable
@@ -679,26 +715,26 @@
 ..will use 1 OMP threads
 total weight (variation) of alignment = 620.777515304633
 
-seq weight loop for 1000 seqs took 0.070741 secs
+seq weight loop for 1000 seqs took 0.048087 secs
 will use 1 OMP threads
 calculated column aa frequencies, gap cols = 4
-calculated pair frequency table in 0.242882 secs
+calculated pair frequency table in 0.051017 secs
 collected apc_mean[MI] = 0.174031486973761
 aa freq sum (cell) = 0.999997158936355, pairfreq sum (cell) = 0.999994420985606
 formed covariance matrix (122/126,4)
-LU factorization took 6.57702 secs, inverted matrix (incl LUf) in 27.1718 secs
+LU factorization took 3.46785 secs, inverted matrix (incl LUf) in 10.5482 secs
 density of inverse covariance matrix = 1 (cksum 346842.2)
 went back to gapped (126) wwi matrix
 collected apc_mean[l1norm] = 117.987034737713
 collected apc_mean[fro] = 3.35437752887409
-all done in 28.0001 secs
+all done in 10.7888 secs
 will use 1 OMP threads
 total weight (variation) of alignment = 561.595172234625
 
-seq weight loop for 1000 seqs took 0.080401 secs
+seq weight loop for 1000 seqs took 0.048347 secs
 will use 1 OMP threads
 calculated column aa frequencies, gap cols = 4
-calculated pair frequency table in 0.205238 secs
+calculated pair frequency table in 0.047376 secs
 collected apc_mean[MI] = 0.165528914074767
 aa freq sum (cell) = 0.999993945475301, pairfreq sum (cell) = 0.999988196197513
 formed covariance matrix (126/126,4)
@@ -716,50 +752,50 @@
 cov matrix Cholesky... not positive definite, dmean dev: 0.0143657
 cov matrix Cholesky... not positive definite, dmean dev: 0.0129291
 cov matrix Cholesky...
-shrank covariance matrix in 15.6317 secs
+shrank covariance matrix in 4.74137 secs
 will try rho 0.00178064, exact solution
- iteration =   1will use 1 OMP threads
-418/1000total weight (variation) of alignment = 620.777515304633
+ iteration =   1 iteration =   2will use 1 OMP threads
+total weight (variation) of alignment = 620.777515304633
 will use 1 OMP threads
 calculated column aa frequencies, gap cols = 4
-calculated pair frequency table in 0.110786 secs
+calculated pair frequency table in 0.049006 secs
 collected apc_mean[MI] = 0.174031486973761
 aa freq sum (cell) = 0.999997158936355, pairfreq sum (cell) = 0.999994420985606
 formed covariance matrix (122/126,4)
-LU factorization took 6.39652 secs, inverted matrix (incl LUf) in 22.0426 secs
+LU factorization took 3.46764 secs, inverted matrix (incl LUf) in 10.5383 secs
 density of inverse covariance matrix = 1 (cksum 346842.2)
 went back to gapped (126) wwi matrix
 collected apc_mean[l1norm] = 117.987034737713
 collected apc_mean[fro] = 3.35437752887409
 .
 ----------------------------------------------------------------------
-Ran 3 tests in 69.458s
+Ran 3 tests in 28.636s
 
 OK
 I: pybuild base:311: python3.12 /build/reproducible-path/python-freecontact-1.1/test/test01.py
 ..will use 1 OMP threads
 total weight (variation) of alignment = 620.777515304633
 
-seq weight loop for 1000 seqs took 0.067031 secs
+seq weight loop for 1000 seqs took 0.048192 secs
 will use 1 OMP threads
 calculated column aa frequencies, gap cols = 4
-calculated pair frequency table in 0.09495 secs
+calculated pair frequency table in 0.051122 secs
 collected apc_mean[MI] = 0.174031486973761
 aa freq sum (cell) = 0.999997158936355, pairfreq sum (cell) = 0.999994420985606
 formed covariance matrix (122/126,4)
-LU factorization took 5.93278 secs, inverted matrix (incl LUf) in 20.9667 secs
+LU factorization took 3.47217 secs, inverted matrix (incl LUf) in 10.6544 secs
 density of inverse covariance matrix = 1 (cksum 346842.2)
 went back to gapped (126) wwi matrix
 collected apc_mean[l1norm] = 117.987034737713
 collected apc_mean[fro] = 3.35437752887409
-all done in 21.4793 secs
+all done in 10.8974 secs
 will use 1 OMP threads
 total weight (variation) of alignment = 561.595172234625
 
-seq weight loop for 1000 seqs took 0.066632 secs
+seq weight loop for 1000 seqs took 0.048119 secs
 will use 1 OMP threads
 calculated column aa frequencies, gap cols = 4
-calculated pair frequency table in 0.103909 secs
+calculated pair frequency table in 0.051828 secs
 collected apc_mean[MI] = 0.165528914074767
 aa freq sum (cell) = 0.999993945475301, pairfreq sum (cell) = 0.999988196197513
 formed covariance matrix (126/126,4)
@@ -777,27 +813,27 @@
 cov matrix Cholesky... not positive definite, dmean dev: 0.0143657
 cov matrix Cholesky... not positive definite, dmean dev: 0.0129291
 cov matrix Cholesky...
-shrank covariance matrix in 11.5856 secs
+shrank covariance matrix in 4.83298 secs
 will try rho 0.00178064, exact solution
- iteration =   1will use 1 OMP threads
+ iteration =   1 iteration =   2will use 1 OMP threads
 total weight (variation) of alignment = 620.777515304633
 will use 1 OMP threads
 calculated column aa frequencies, gap cols = 4
-calculated pair frequency table in 0.122226 secs
+calculated pair frequency table in 0.038566 secs
 collected apc_mean[MI] = 0.174031486973761
 aa freq sum (cell) = 0.999997158936355, pairfreq sum (cell) = 0.999994420985606
 formed covariance matrix (122/126,4)
-LU factorization took 6.05271 secs, inverted matrix (incl LUf) in 26.3164 secs
+LU factorization took 3.45927 secs, inverted matrix (incl LUf) in 10.5167 secs
 density of inverse covariance matrix = 1 (cksum 346842.2)
 went back to gapped (126) wwi matrix
 collected apc_mean[l1norm] = 117.987034737713
 collected apc_mean[fro] = 3.35437752887409
 .
 ----------------------------------------------------------------------
-Ran 3 tests in 62.981s
+Ran 3 tests in 28.842s
 
 OK
-	rm -fr -- /tmp/dh-xdg-rundir-yYX_JwZI
+	rm -fr -- /tmp/dh-xdg-rundir-mPVxePyt
 make[1]: Leaving directory '/build/reproducible-path/python-freecontact-1.1'
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=pybuild -O--builddirectory=/build/reproducible-path/python-freecontact-1.1/builddir
@@ -857,7 +893,7 @@
 D: dh_python3 fs:50: moving files from debian/python3-freecontact/usr/lib/python3.13/dist-packages to debian/python3-freecontact/usr/lib/python3/dist-packages/
 D: dh_python3 fs:338: package python3-freecontact details = {'requires.txt': set(), 'egg-info': {'debian/python3-freecontact/usr/lib/python3/dist-packages/python_freecontact-1.1.egg-info/PKG-INFO'}, 'dist-info': set(), 'nsp.txt': set(), 'shebangs': set(), 'public_vers': {Version('3')}, 'private_dirs': {}, 'compile': False, 'ext_vers': {Version('3.12'), Version('3.13')}, 'ext_no_version': set()}
 D: dh_python3 depends:103: generating dependencies for package python3-freecontact
-D: dh_python3 depends:253: D={'python3 (<< 3.14)', 'python3 (>= 3.12~)'}; R=[]; S=[]; E=[], B=[]; RT=[]
+D: dh_python3 depends:253: D={'python3 (>= 3.12~)', 'python3 (<< 3.14)'}; R=[]; S=[]; E=[], B=[]; RT=[]
    dh_installsystemduser -O--buildsystem=pybuild -O--builddirectory=/build/reproducible-path/python-freecontact-1.1/builddir
    dh_perl -O--buildsystem=pybuild -O--builddirectory=/build/reproducible-path/python-freecontact-1.1/builddir
    dh_link -O--buildsystem=pybuild -O--builddirectory=/build/reproducible-path/python-freecontact-1.1/builddir
@@ -923,8 +959,8 @@
    dh_builddeb -O--buildsystem=pybuild -O--builddirectory=/build/reproducible-path/python-freecontact-1.1/builddir
 	dpkg-deb --root-owner-group --build debian/python3-freecontact ..
 	dpkg-deb --root-owner-group --build debian/.debhelper/python3-freecontact/dbgsym-root ..
-dpkg-deb: building package 'python3-freecontact' in '../python3-freecontact_1.1-9_i386.deb'.
 dpkg-deb: building package 'python3-freecontact-dbgsym' in '../python3-freecontact-dbgsym_1.1-9_i386.deb'.
+dpkg-deb: building package 'python3-freecontact' in '../python3-freecontact_1.1-9_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../python-freecontact_1.1-9_i386.buildinfo
  dpkg-genchanges --build=binary -O../python-freecontact_1.1-9_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -932,12 +968,14 @@
 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/54292/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/54292/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/19197 and its subdirectories
-I: Current time: Tue Jan 21 01:11:16 -12 2025
-I: pbuilder-time-stamp: 1737465076
+I: removing directory /srv/workspace/pbuilder/54292 and its subdirectories
+I: Current time: Tue Feb 24 09:36:18 +14 2026
+I: pbuilder-time-stamp: 1771875378