Diff of the two buildlogs:

--
--- b1/build.log	2024-12-05 20:29:12.160982691 +0000
+++ b2/build.log	2024-12-05 20:33:04.634460741 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Thu Dec  5 08:25:28 -12 2024
-I: pbuilder-time-stamp: 1733430328
+I: Current time: Thu Jan  8 16:52:15 +14 2026
+I: pbuilder-time-stamp: 1767840735
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -32,52 +32,84 @@
 dpkg-source: info: applying gcc14.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/266491/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2643502/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink03-arm64.
+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  8 02:52 /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/2643502/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2643502/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='4c4c9d32b3e24b2180ac084add591b89'
-  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='266491'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=cd33def6bc86493982698dd56d87860a
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=2643502
   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.mfbDE55F/pbuilderrc_x10w --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.mfbDE55F/b1 --logfile b1/build.log libcgns_3.4.0-5.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.mfbDE55F/pbuilderrc_4NDQ --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.mfbDE55F/b2 --logfile b2/build.log libcgns_3.4.0-5.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink04-arm64 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-cloud-arm64 #1 SMP Debian 6.1.119-1 (2024-11-22) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/266491/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2643502/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -327,7 +359,7 @@
 Get: 196 http://deb.debian.org/debian unstable/main arm64 tk arm64 8.6.14 [4076 B]
 Get: 197 http://deb.debian.org/debian unstable/main arm64 tk8.6-dev arm64 8.6.15-1 [761 kB]
 Get: 198 http://deb.debian.org/debian unstable/main arm64 tk-dev arm64 8.6.14 [3892 B]
-Fetched 117 MB in 1s (210 MB/s)
+Fetched 117 MB in 1s (211 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package tzdata.
 (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 ... 20086 files and directories currently installed.)
@@ -967,8 +999,8 @@
 Setting up tzdata (2024b-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Dec  5 20:25:57 UTC 2024.
-Universal Time is now:  Thu Dec  5 20:25:57 UTC 2024.
+Local time is now:      Thu Jan  8 02:52:40 UTC 2026.
+Universal Time is now:  Thu Jan  8 02:52:40 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libxcb-present0:arm64 (1.17.0-2+b1) ...
@@ -1145,7 +1177,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/libcgns-3.4.0/ && 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  > ../libcgns_3.4.0-5_source.changes
+I: user script /srv/workspace/pbuilder/2643502/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2643502/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/libcgns-3.4.0/ && 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  > ../libcgns_3.4.0-5_source.changes
 dpkg-buildpackage: info: source package libcgns
 dpkg-buildpackage: info: source version 3.4.0-5
 dpkg-buildpackage: info: source distribution unstable
@@ -1260,7 +1296,7 @@
 This warning is for project developers.  Use -Wno-dev to suppress it.
 
 -- Found OpenGL: /usr/lib/aarch64-linux-gnu/libOpenGL.so
--- Configuring done (10.7s)
+-- Configuring done (10.5s)
 CMake Warning (dev) in src/tools/CMakeLists.txt:
   Policy CMP0081 is not set: Relative paths not allowed in LINK_DIRECTORIES
   target property.  Run "cmake --help-policy CMP0081" for policy details.
@@ -2299,7 +2335,7 @@
 
 This warning is for project developers.  Use -Wno-dev to suppress it.
 
--- Generating done (0.3s)
+-- Generating done (0.2s)
 CMake Warning:
   Manually-specified variables were not used by the project:
 
@@ -4139,14 +4175,14 @@
 2: Test command: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests/elemtest
 2: Working Directory: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests
 2: Test timeout computed to be: 10000000
- 2/22 Test  #2: elemtest .........................   Passed    0.06 sec
+ 2/22 Test  #2: elemtest .........................   Passed    0.07 sec
 test 3
       Start  3: ser_benchmark_hdf5
 
 3: Test command: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests/ser_benchmark_hdf5
 3: Working Directory: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests
 3: Test timeout computed to be: 10000000
- 3/22 Test  #3: ser_benchmark_hdf5 ...............   Passed    0.05 sec
+ 3/22 Test  #3: ser_benchmark_hdf5 ...............   Passed    0.08 sec
 test 4
       Start  4: test_exts
 
@@ -4198,7 +4234,7 @@
 5: closing file and reopening in modify mode
 5: deleting user defined data and checking
 5: closing file
- 5/22 Test  #5: test_goto ........................   Passed    0.45 sec
+ 5/22 Test  #5: test_goto ........................   Passed    0.46 sec
 test 6
       Start  6: test_partial
 
@@ -4344,7 +4380,7 @@
 7: Test command: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests/test_ver31
 7: Working Directory: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests
 7: Test timeout computed to be: 10000000
- 7/22 Test  #7: test_ver31 .......................   Passed    0.16 sec
+ 7/22 Test  #7: test_ver31 .......................   Passed    0.14 sec
 test 8
       Start  8: test_multifam
 
@@ -4390,8 +4426,8 @@
 11: Working Directory: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests
 11: Test timeout computed to be: 10000000
 11: writing 100 arrays of size 1024
-11: time = 0.06627 secs, size = 0.537396 Mb
-11/22 Test #11: write_array ......................   Passed    0.08 sec
+11: time = 0.071583 secs, size = 0.537396 Mb
+11/22 Test #11: write_array ......................   Passed    0.09 sec
 test 12
       Start 12: write_bcdata
 
@@ -4409,14 +4445,14 @@
 13: Working Directory: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests
 13: Test timeout computed to be: 10000000
 13: number of zones  = 50
-13: creating zones ... 0.096712 secs
-13: creating link file ... 0.00753 secs
+13: creating zones ... 0.099125 secs
+13: creating link file ... 0.007844 secs
 13: file size        = 0.0589733 Mb
 13: opening top link file  ...close top link file
 13: opening child link file ... [1] zones
 13: opening top link file (child still open) ... [50] zones...close top link file
 13: read child link file ... [1] zones...close child link file
-13/22 Test #13: write_links ......................   Passed    0.56 sec
+13/22 Test #13: write_links ......................   Passed    0.55 sec
 test 14
       Start 14: write_rind
 
@@ -4425,7 +4461,7 @@
 14: Test timeout computed to be: 10000000
 14: writing structured base with rind
 14: writing unstructured base with rind
-14/22 Test #14: write_rind .......................   Passed    0.02 sec
+14/22 Test #14: write_rind .......................   Passed    0.03 sec
 test 15
       Start 15: write_test
 
@@ -4444,17 +4480,17 @@
 16: Working Directory: /build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu/src/tests
 16: Test timeout computed to be: 10000000
 16: number of zones  = 250
-16: creating zones ... 0.215824 secs
-16: closing file   ... 0.036406 secs
+16: creating zones ... 0.217447 secs
+16: closing file   ... 0.035853 secs
 16: file size        = 1.36303 Mb
-16: opening file   ... 0.388496 secs
-16: modifying file ... 1.14823 secs
-16: writing file   ... 0.069408 secs
+16: opening file   ... 0.376455 secs
+16: modifying file ... 1.07266 secs
+16: writing file   ... 0.066405 secs
 16: file size        = 1.84075 Mb
-16: creating link file ... 0.054376 secs
+16: creating link file ... 0.052697 secs
 16: file size        = 0.277192 Mb
-16: opening link file  ... 1.40273 secs
-16/22 Test #16: write_zones ......................   Passed    3.39 sec
+16: opening link file  ... 1.29804 secs
+16/22 Test #16: write_zones ......................   Passed    3.18 sec
 test 17
       Start 17: cgiof_f03
 
@@ -5111,7 +5147,7 @@
 
 100% tests passed, 0 tests failed out of 22
 
-Total Test time (real) =   6.01 sec
+Total Test time (real) =   5.84 sec
 make[1]: Leaving directory '/build/reproducible-path/libcgns-3.4.0/obj-aarch64-linux-gnu'
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--no-parallel
@@ -6158,8 +6194,8 @@
    dh_md5sums -O--no-parallel
    dh_builddeb -O--no-parallel
 dpkg-deb: building package 'libcgns-dev' in '../libcgns-dev_3.4.0-5_arm64.deb'.
-dpkg-deb: building package 'libcgns3.4-dbgsym' in '../libcgns3.4-dbgsym_3.4.0-5_arm64.deb'.
 dpkg-deb: building package 'libcgns3.4' in '../libcgns3.4_3.4.0-5_arm64.deb'.
+dpkg-deb: building package 'libcgns3.4-dbgsym' in '../libcgns3.4-dbgsym_3.4.0-5_arm64.deb'.
 dpkg-deb: building package 'cgns-convert' in '../cgns-convert_3.4.0-5_arm64.deb'.
 dpkg-deb: building package 'cgns-convert-dbgsym' in '../cgns-convert-dbgsym_3.4.0-5_arm64.deb'.
  dpkg-genbuildinfo --build=binary -O../libcgns_3.4.0-5_arm64.buildinfo
@@ -6169,12 +6205,14 @@
 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/2643502/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2643502/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/266491 and its subdirectories
-I: Current time: Thu Dec  5 08:29:11 -12 2024
-I: pbuilder-time-stamp: 1733430551
+I: removing directory /srv/workspace/pbuilder/2643502 and its subdirectories
+I: Current time: Thu Jan  8 16:56:03 +14 2026
+I: pbuilder-time-stamp: 1767840963