Diff of the two buildlogs:

--
--- b1/build.log	2025-01-17 07:29:18.403916269 +0000
+++ b2/build.log	2025-01-17 07:57:03.244463082 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Feb 19 01:42:41 -12 2026
-I: pbuilder-time-stamp: 1771508561
+I: Current time: Fri Jan 17 21:29:20 +14 2025
+I: pbuilder-time-stamp: 1737098960
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -29,54 +29,86 @@
 dpkg-source: info: applying ls_locale_for_reproducible_order.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/70974/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/53998/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos12-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 Jan 17 07:29 /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/53998/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/53998/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=22 '
-  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=10 '
+  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='f3429648060945bea99bdca311b4d953'
-  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='70974'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=d0fbeb2c7f6e458eac37e841eccc995b
+  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=53998
   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.6JBVwN9d/pbuilderrc_5HP3 --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.6JBVwN9d/b1 --logfile b1/build.log elkcode_10.2.4-1.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://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.6JBVwN9d/pbuilderrc_sUlN --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.6JBVwN9d/b2 --logfile b2/build.log elkcode_10.2.4-1.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos16-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  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/70974/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/53998/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -279,7 +311,7 @@
 Get: 145 http://deb.debian.org/debian trixie/main i386 texlive-latex-recommended all 2024.20241115-1 [8757 kB]
 Get: 146 http://deb.debian.org/debian trixie/main i386 texlive-pictures all 2024.20241115-1 [17.0 MB]
 Get: 147 http://deb.debian.org/debian trixie/main i386 texlive-latex-extra all 2024.20241115-1 [24.6 MB]
-Fetched 175 MB in 4s (45.4 MB/s)
+Fetched 175 MB in 2s (84.4 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 ... 19839 files and directories currently installed.)
@@ -769,8 +801,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Feb 19 13:43:14 UTC 2026.
-Universal Time is now:  Thu Feb 19 13:43:14 UTC 2026.
+Local time is now:      Fri Jan 17 07:30:04 UTC 2025.
+Universal Time is now:  Fri Jan 17 07:30:04 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -927,7 +959,11 @@
 fakeroot is already the newest version (1.36.2-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/elkcode-10.2.4/ && 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  > ../elkcode_10.2.4-1_source.changes
+I: user script /srv/workspace/pbuilder/53998/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/53998/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/elkcode-10.2.4/ && 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  > ../elkcode_10.2.4-1_source.changes
 dpkg-buildpackage: info: source package elkcode
 dpkg-buildpackage: info: source version 10.2.4-1
 dpkg-buildpackage: info: source distribution unstable
@@ -937,7 +973,7 @@
  fakeroot debian/rules clean
 dh clean
    dh_auto_clean
-	make -j22 clean
+	make -j10 clean
 make[1]: Entering directory '/build/reproducible-path/elkcode-10.2.4'
 cd src; make cleanall
 make[2]: Entering directory '/build/reproducible-path/elkcode-10.2.4/src'
@@ -7410,11 +7446,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7460,11 +7496,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7493,11 +7529,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7530,11 +7566,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7563,11 +7599,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7608,11 +7644,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7629,12 +7665,12 @@
 └────────────────────┘
 Info(elnes):      1 of      8 k-points
 Info(elnes):      3 of      8 k-points
-Info(elnes):      8 of      8 k-points
 Info(elnes):      4 of      8 k-points
-Info(elnes):      6 of      8 k-points
-Info(elnes):      5 of      8 k-points
 Info(elnes):      2 of      8 k-points
+Info(elnes):      5 of      8 k-points
+Info(elnes):      6 of      8 k-points
 Info(elnes):      7 of      8 k-points
+Info(elnes):      8 of      8 k-points
 
 Info(elnes):
  ELNES double differential cross-section written to ELNES.OUT
@@ -7657,11 +7693,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7695,11 +7731,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7747,11 +7783,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7781,11 +7817,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7798,35 +7834,35 @@
   0.3750000000      0.3750000000      0.3750000000    
 See GEOMETRY.OUT for new atomic positions
 Info(oepvcl):      1 of      8 k-points
-Info(oepvcl):      8 of      8 k-points
-Info(oepvcl):      5 of      8 k-points
 Info(oepvcl):      2 of      8 k-points
-Info(oepvcl):      7 of      8 k-points
 Info(oepvcl):      3 of      8 k-points
 Info(oepvcl):      4 of      8 k-points
+Info(oepvcl):      5 of      8 k-points
 Info(oepvcl):      6 of      8 k-points
+Info(oepvcl):      7 of      8 k-points
+Info(oepvcl):      8 of      8 k-points
 Info(oepmain): done   10 iterations of   20
 Info(oepmain): done   20 iterations of   20
 
 Warning(gndstate): failed to reach self-consistency after    2 loops
 Info(oepvcl):      1 of      8 k-points
+Info(oepvcl):      4 of      8 k-points
+Info(oepvcl):      3 of      8 k-points
 Info(oepvcl):      2 of      8 k-points
 Info(oepvcl):      5 of      8 k-points
-Info(oepvcl):      8 of      8 k-points
 Info(oepvcl):      6 of      8 k-points
-Info(oepvcl):      4 of      8 k-points
-Info(oepvcl):      3 of      8 k-points
 Info(oepvcl):      7 of      8 k-points
+Info(oepvcl):      8 of      8 k-points
 Info(oepmain): done   10 iterations of   20
 Info(oepmain): done   20 iterations of   20
+Info(exxengy):      1 of      8 k-points
 Info(exxengy):      2 of      8 k-points
-Info(exxengy):      5 of      8 k-points
 Info(exxengy):      3 of      8 k-points
-Info(exxengy):      8 of      8 k-points
-Info(exxengy):      1 of      8 k-points
 Info(exxengy):      4 of      8 k-points
-Info(exxengy):      7 of      8 k-points
+Info(exxengy):      5 of      8 k-points
 Info(exxengy):      6 of      8 k-points
+Info(exxengy):      7 of      8 k-points
+Info(exxengy):      8 of      8 k-points
 
 ┌────────────────────┐
 │ Current task : 500 │
@@ -7846,11 +7882,11 @@
 └─────────────────────────────────┘
 
 Number of MPI processes :      1
-Number of OpenMP threads per MPI process :   24
-Total number of threads (MPI x OpenMP) :     24
+Number of OpenMP threads per MPI process :   13
+Total number of threads (MPI x OpenMP) :     13
 Maximum OpenMP nesting level :    4
-Number of OpenMP threads at first nesting level :   24
-Number of MKL threads :   24
+Number of OpenMP threads at first nesting level :   13
+Number of MKL threads :   13
 
 RAM disk enabled
 
@@ -7936,8 +7972,8 @@
 dpkg-gencontrol: warning: package elk-lapw: substitution variable ${perl:Depends} unused, but is defined
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'elk-lapw-dbgsym' in '../elk-lapw-dbgsym_10.2.4-1_i386.deb'.
 dpkg-deb: building package 'elk-lapw' in '../elk-lapw_10.2.4-1_i386.deb'.
+dpkg-deb: building package 'elk-lapw-dbgsym' in '../elk-lapw-dbgsym_10.2.4-1_i386.deb'.
  dpkg-genbuildinfo --build=binary -O../elkcode_10.2.4-1_i386.buildinfo
  dpkg-genchanges --build=binary -O../elkcode_10.2.4-1_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -7945,12 +7981,14 @@
 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/53998/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/53998/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/70974 and its subdirectories
-I: Current time: Thu Feb 19 01:52:15 -12 2026
-I: pbuilder-time-stamp: 1771509135
+I: removing directory /srv/workspace/pbuilder/53998 and its subdirectories
+I: Current time: Fri Jan 17 21:57:02 +14 2025
+I: pbuilder-time-stamp: 1737100622