Diff of the two buildlogs:

--
--- b1/build.log	2025-03-19 06:25:23.099564947 +0000
+++ b2/build.log	2025-03-19 06:27:53.560771290 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Apr 21 00:46:29 -12 2026
-I: pbuilder-time-stamp: 1776775589
+I: Current time: Wed Mar 19 20:25:26 +14 2025
+I: pbuilder-time-stamp: 1742365526
 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 0002-Numpy-2-compatibility.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2403513/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3880688/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-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 Mar 19 06:25 /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/3880688/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3880688/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='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='1ad8e3dc9e214698a87b0798d98c5a4c'
-  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='2403513'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=664d4f01f0294ac7a1276aec13096a9b
+  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=3880688
   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.bHnVOUy1/pbuilderrc_djJy --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.bHnVOUy1/b1 --logfile b1/build.log pyusid_0.0.12-3.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.bHnVOUy1/pbuilderrc_TmTy --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.bHnVOUy1/b2 --logfile b2/build.log pyusid_0.0.12-3.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 codethink03-arm64 6.1.0-32-cloud-arm64 #1 SMP Debian 6.1.129-1 (2025-03-06) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-32-cloud-arm64 #1 SMP Debian 6.1.129-1 (2025-03-06) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2403513/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3880688/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -368,7 +400,7 @@
 Get: 244 http://deb.debian.org/debian trixie/main arm64 python3-sklearn-lib arm64 1.4.2+dfsg-8 [3408 kB]
 Get: 245 http://deb.debian.org/debian trixie/main arm64 python3-sklearn all 1.4.2+dfsg-8 [2248 kB]
 Get: 246 http://deb.debian.org/debian trixie/main arm64 python3-sidpy all 0.12.3-3 [76.9 kB]
-Fetched 142 MB in 1s (143 MB/s)
+Fetched 142 MB in 1s (117 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libtext-charwidth-perl:arm64.
 (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 ... 19899 files and directories currently installed.)
@@ -1166,8 +1198,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Apr 21 12:47:13 UTC 2026.
-Universal Time is now:  Tue Apr 21 12:47:13 UTC 2026.
+Local time is now:      Wed Mar 19 06:26:28 UTC 2025.
+Universal Time is now:  Wed Mar 19 06:26:28 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up unicode-data (15.1.0-1) ...
@@ -1396,7 +1428,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/pyusid-0.0.12/ && 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  > ../pyusid_0.0.12-3_source.changes
+I: user script /srv/workspace/pbuilder/3880688/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3880688/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/pyusid-0.0.12/ && 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  > ../pyusid_0.0.12-3_source.changes
 dpkg-buildpackage: info: source package pyusid
 dpkg-buildpackage: info: source version 0.0.12-3
 dpkg-buildpackage: info: source distribution unstable
@@ -1433,8 +1469,8 @@
         Please discontinue using this option, or if you still need it,
         file an issue with pypa/setuptools describing your use case.
 
-        This deprecation is overdue, please update your project and remove deprecated
-        calls to avoid build errors in the future.
+        By 2025-Aug-30, you need to update your project and remove deprecated calls
+        or your builds will no longer be supported.
         ********************************************************************************
 
 !!
@@ -1501,7 +1537,7 @@
 Copying pyUSID.egg-info to build/bdist.linux-aarch64/wheel/./pyUSID-0.0.12.egg-info
 running install_scripts
 creating build/bdist.linux-aarch64/wheel/pyUSID-0.0.12.dist-info/WHEEL
-creating '/build/reproducible-path/pyusid-0.0.12/.pybuild/cpython3_3.13_pyusid/.tmp-jknlpx1r/pyUSID-0.0.12-py2.py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
+creating '/build/reproducible-path/pyusid-0.0.12/.pybuild/cpython3_3.13_pyusid/.tmp-pdgbah3l/pyUSID-0.0.12-py2.py3-none-any.whl' and adding 'build/bdist.linux-aarch64/wheel' to it
 adding 'pyUSID/__init__.py'
 adding 'pyUSID/__version__.py'
 adding 'pyUSID/io/__init__.py'
@@ -1580,9 +1616,9 @@
 test_dask_out_ordinary_1d_pos (tests.io.hdf_utils.test_model.TestReshapeToNDims.test_dask_out_ordinary_1d_pos) ... ok
 test_dask_out_ordinary_1d_spec (tests.io.hdf_utils.test_model.TestReshapeToNDims.test_dask_out_ordinary_1d_spec) ... 2D: False, Spec: False, Flip: False
 Main data shapes ND: (2,), 2D: (2, 1)
-[148 193]
-[[148]
- [193]]
+[ 78 147]
+[[ 78]
+ [147]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1619,8 +1655,8 @@
 Dataset now of shape: (2, 1)
 2D: False, Spec: True, Flip: False
 Main data shapes ND: (2,), 2D: (1, 2)
-[185 153]
-[[185 153]]
+[ 79 103]
+[[ 79 103]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1657,9 +1693,9 @@
 Dataset now of shape: (1, 2)
 2D: False, Spec: False, Flip: False
 Main data shapes ND: (2,), 2D: (2, 1)
-[ 15 155]
-[[ 15]
- [155]]
+[218 136]
+[[218]
+ [136]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1696,8 +1732,8 @@
 Dataset now of shape: (2, 1)
 2D: False, Spec: True, Flip: False
 Main data shapes ND: (2,), 2D: (1, 2)
-[102  82]
-[[102  82]]
+[60 82]
+[[60 82]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1734,8 +1770,8 @@
 Dataset now of shape: (1, 2)
 2D: False, Spec: False, Flip: False
 Main data shapes ND: (2,), 2D: (2, 1)
-[  7 127]
-[[  7]
+[197 127]
+[[197]
  [127]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
@@ -1773,8 +1809,8 @@
 Dataset now of shape: (2, 1)
 2D: False, Spec: True, Flip: False
 Main data shapes ND: (2,), 2D: (1, 2)
-[221 109]
-[[221 109]]
+[77 14]
+[[77 14]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1913,9 +1949,9 @@
 Dataset now of shape: (5, 3, 7, 2)
 2D: False, Spec: False, Flip: False
 Main data shapes ND: (2,), 2D: (2, 1)
-[214  70]
-[[214]
- [ 70]]
+[159 189]
+[[159]
+ [189]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1952,8 +1988,8 @@
 Dataset now of shape: (2, 1)
 2D: False, Spec: True, Flip: False
 Main data shapes ND: (2,), 2D: (1, 2)
-[156  31]
-[[156  31]]
+[251  19]
+[[251  19]]
 Position dimensions: ['Position Dimension 0']
 Position sort order: [0]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -1990,14 +2026,14 @@
 Dataset now of shape: (1, 2)
 2D: True, Spec: False, Flip: False
 Main data shapes ND: (2, 3), 2D: (6, 1)
-[[155 169 253]
- [142 182  74]]
-[[155]
- [169]
- [253]
- [142]
+[[103 216 182]
+ [ 90 202 192]]
+[[103]
+ [216]
  [182]
- [ 74]]
+ [ 90]
+ [202]
+ [192]]
 Position dimensions: ['Position Dimension 0' 'Position Dimension 1']
 Position sort order: [0 1]
 Spectroscopic Dimensions: ['Spectral Dimension 0']
@@ -2034,9 +2070,9 @@
 Dataset now of shape: (3, 2, 1)
 2D: True, Spec: True, Flip: False
 Main data shapes ND: (2, 3), 2D: (1, 6)
-[[ 32 159  39]
- [248 180 214]]
-[[ 32 159  39 248 180 214]]
+[[218 192 143]
+ [151 154 233]]
+[[218 192 143 151 154 233]]
 Position dimensions: ['Position Dimension 0']
 Position sort order:ok
 test_numpy_pos_inds_order_flipped (tests.io.hdf_utils.test_model.TestReshapeToNDims.test_numpy_pos_inds_order_flipped) ... ok
@@ -2954,7 +2990,7 @@
 BICUBIC BICUBIC
 False False
 26 26
-226 226
+236 236
 [[  0   0]
  [  1   0]
  [  2   0]
@@ -3179,11 +3215,11 @@
 Rank 0 will read positions 0 to 15 of 15
 	This class does NOT support interruption and resuming of computations.
 	In order to enable this feature, simply implement the _get_existing_datasets() function
-Rank: 0 - with nothing loaded has 45.1 GB free memory
+Rank: 0 - with nothing loaded has 44.18 GB free memory
 Rank 0 will read positions: [0 1 2 3 4 5]
 Rank 0 will read 672.0 bytes of the SOURCE dataset.
-Rank: 0 available memory: 45.1 GB. 10 workers on this socket will in total read ~ 6.56 kB.
-Rank: 0 - with only raw data loaded has 45.1 GB free memory
+Rank: 0 available memory: 44.18 GB. 10 workers on this socket will in total read ~ 6.56 kB.
+Rank: 0 - with only raw data loaded has 44.18 GB free memory
 Rank 0 at Process class' default _unit_computation() that will call parallel_compute()
 Number of CPU free cores set to: 2 given that the CPU has 12 logical cores.
 10 cores requested.
@@ -3193,12 +3229,12 @@
 Rank 0 starting computing on 1 cores (requested 10 cores)
 Rank 0 computing serially ...
 Rank 0 - computed chunk in 0.0 msec or 0.0 msec per pixel. Average: 0.0 msec per pixel.
-Rank: 0 - now holding onto raw data + results has 45.09 GB free memory
+Rank: 0 - now holding onto raw data + results has 44.18 GB free memory
 Rank 0 - wrote its 6 pixel chunk in 0.0 msec
 Rank 0 - 40% complete. Time remaining: 0.0 msec
 Rank 0 will read positions: [ 6  7  8  9 10 11]
 Rank 0 will read 672.0 bytes of the SOURCE dataset.
-Rank: 0 available memory: 45.09 GB. 10 workers on this socket will in total read ~ 6.56 kB.
+Rank: 0 available memory: 44.19 GB. 10 workers on this socket will in total read ~ 6.56 kB.
 Rank 0 at Process class' default _unit_computation() that will call parallel_compute()
 Number of CPU free cores set to: 2 given that the CPU has 12 logical cores.
 10 cores requested.
@@ -3208,12 +3244,12 @@
 Rank 0 starting computing on 1 cores (requested 10 cores)
 Rank 0 computing serially ...
 Rank 0 - computed chunk in 0.0 msec or 0.0 msec per pixel. Average: 0.0 msec per pixel.
-Rank: 0 - now holding onto raw data + results has 45.09 GB free memory
+Rank: 0 - now holding onto raw data + results has 44.19 GB free memory
 Rank 0 - wrote its 6 pixel chunk in 0.0 msec
 Rank 0 - 80% complete. Time remaining: 0.0 msec
 Rank 0 will read positions: [12 13 14]
 Rank 0 will read 336.0 bytes of the SOURCE dataset.
-Rank: 0 available memory: 45.09 GB. 10 workers on this socket will in total read ~ 3.28 kB.
+Rank: 0 available memory: 44.19 GB. 10 workers on this socket will in total read ~ 3.28 kB.
 Rank 0 at Process class' default _unit_computation() that will call parallel_compute()
 Number of CPU free cores set to: 2 given that the CPU has 12 logical cores.
 10 cores requested.
@@ -3223,7 +3259,7 @@
 Rank 0 starting computing on 1 cores (requested 10 cores)
 Rank 0 computing serially ...
 Rank 0 - computed chunk in 0.0 msec or 0.0 msec per pixel. Average: 0.0 msec per pixel.
-Rank: 0 - now holding onto raw data + results has 45.09 GB free memory
+Rank: 0 - now holding onto raw data + results has 44.19 GB free memory
 Rank 0 - wrote its 3 pixel chunk in 0.0 msec
 Rank 0 - 100% complete. Time remaining: 0.0 msec
 Rank 0 - Finished reading all data!
@@ -3305,7 +3341,7 @@
 test_tfunc (tests.processing.test_process.TestWriteResultsToNewH5File.test_tfunc) ... ok
 
 ----------------------------------------------------------------------
-Ran 357 tests in 11.110s
+Ran 357 tests in 11.063s
 
 OK
 
@@ -3416,12 +3452,14 @@
 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/3880688/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3880688/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/2403513 and its subdirectories
-I: Current time: Tue Apr 21 00:48:21 -12 2026
-I: pbuilder-time-stamp: 1776775701
+I: removing directory /srv/workspace/pbuilder/3880688 and its subdirectories
+I: Current time: Wed Mar 19 20:27:52 +14 2025
+I: pbuilder-time-stamp: 1742365672