Diff of the two buildlogs:

--
--- b1/build.log	2025-02-17 16:09:55.750949342 +0000
+++ b2/build.log	2025-02-17 16:16:40.772771563 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Feb 17 03:56:09 -12 2025
-I: pbuilder-time-stamp: 1739807769
+I: Current time: Mon Mar 23 12:36:55 +14 2026
+I: pbuilder-time-stamp: 1774219015
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: applying downgrade-to-0.4.5.patch
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3237463/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2872461/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 Mar 22 22:37 /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/2872461/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2872461/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='unstable'
-  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=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='8f3c517ffba641b7a1d7e39db92f202e'
-  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='3237463'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=78644396daa04aadb5ff64d30f7e7974
+  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=2872461
   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.Cba7LUqJ/pbuilderrc_w5UW --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.Cba7LUqJ/b1 --logfile b1/build.log safetensors_0.5.2-1.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  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.Cba7LUqJ/pbuilderrc_B49c --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.Cba7LUqJ/b2 --logfile b2/build.log safetensors_0.5.2-1.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 ionos11-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 6.12.9+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.9-1~bpo12+1 (2025-01-19) 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/3237463/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2872461/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -82,7 +114,7 @@
 Depends: debhelper-compat (= 13), python3-all-dev, python3-all, dh-python, python3-setuptools-rust, pybuild-plugin-pyproject, rustc, cargo, python3-maturin, librust-memmap2-dev, librust-criterion-dev, librust-proptest-dev, librust-serde-dev, librust-serde-json-dev, librust-pyo3-dev
 dpkg-deb: building package 'pbuilder-satisfydepends-dummy' in '/tmp/satisfydepends-aptitude/pbuilder-satisfydepends-dummy.deb'.
 Selecting previously unselected package pbuilder-satisfydepends-dummy.
-(Reading database ... 19804 files and directories currently installed.)
+(Reading database ... 19854 files and directories currently installed.)
 Preparing to unpack .../pbuilder-satisfydepends-dummy.deb ...
 Unpacking pbuilder-satisfydepends-dummy (0.invalid.0) ...
 dpkg: pbuilder-satisfydepends-dummy: dependency problems, but configuring anyway as you requested:
@@ -641,10 +673,10 @@
 Get: 506 http://deb.debian.org/debian unstable/main amd64 python3-maturin amd64 1.7.4-2 [3340 kB]
 Get: 507 http://deb.debian.org/debian unstable/main amd64 python3-semantic-version all 2.10.0-3 [17.7 kB]
 Get: 508 http://deb.debian.org/debian unstable/main amd64 python3-setuptools-rust all 1.9.0+dfsg-3 [27.0 kB]
-Fetched 214 MB in 27s (7888 kB/s)
+Fetched 214 MB in 3s (71.4 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:amd64.
-(Reading database ... 
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+(Reading database ... 
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(Reading database ... 19854 files and directories currently installed.)
 Preparing to unpack .../libpython3.13-minimal_3.13.2-1_amd64.deb ...
 Unpacking libpython3.13-minimal:amd64 (3.13.2-1) ...
 Selecting previously unselected package libexpat1:amd64.
@@ -657,7 +689,7 @@
 Setting up libexpat1:amd64 (2.6.4-1) ...
 Setting up python3.13-minimal (3.13.2-1) ...
 Selecting previously unselected package python3-minimal.
-(Reading database ... 
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(Reading database ... 20138 files and directories currently installed.)
+(Reading database ... 
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(Reading database ... 20188 files and directories currently installed.)
 Preparing to unpack .../0-python3-minimal_3.13.1-2_amd64.deb ...
 Unpacking python3-minimal (3.13.1-2) ...
 Selecting previously unselected package media-types.
@@ -693,7 +725,7 @@
 Unpacking libpython3-stdlib:amd64 (3.13.1-2) ...
 Setting up python3-minimal (3.13.1-2) ...
 Selecting previously unselected package python3.
-(Reading database ... 
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(Reading database ... 21148 files and directories currently installed.)
+(Reading database ... 
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(Reading database ... 21198 files and directories currently installed.)
 Preparing to unpack .../000-python3_3.13.1-2_amd64.deb ...
 Unpacking python3 (3.13.1-2) ...
 Selecting previously unselected package libpython3.12-minimal:amd64.
@@ -2242,8 +2274,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Feb 17 16:02:16 UTC 2025.
-Universal Time is now:  Mon Feb 17 16:02:16 UTC 2025.
+Local time is now:      Sun Mar 22 22:37:58 UTC 2026.
+Universal Time is now:  Sun Mar 22 22:37:58 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up librust-unicode-segmentation-dev:amd64 (1.12.0-1) ...
@@ -2707,7 +2739,11 @@
 fakeroot is already the newest version (1.37-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/safetensors-0.5.2/ && 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  > ../safetensors_0.5.2-1_source.changes
+I: user script /srv/workspace/pbuilder/2872461/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2872461/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/safetensors-0.5.2/ && 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  > ../safetensors_0.5.2-1_source.changes
 dpkg-buildpackage: info: source package safetensors
 dpkg-buildpackage: info: source version 0.5.2-1
 dpkg-buildpackage: info: source distribution unstable
@@ -2749,8 +2785,8 @@
 🐍 Found CPython 3.12 at /usr/bin/python3.12
 📡 Using build options features, bindings from pyproject.toml
    Compiling target-lexicon v0.12.14
-   Compiling proc-macro2 v1.0.92
    Compiling once_cell v1.20.2
+   Compiling proc-macro2 v1.0.92
    Compiling unicode-ident v1.0.13
    Compiling libc v0.2.169
    Compiling serde v1.0.217
@@ -2760,14 +2796,14 @@
    Compiling itoa v1.0.14
    Compiling memchr v2.7.4
    Compiling ryu v1.0.19
+   Compiling indoc v2.0.5
    Compiling unindent v0.2.3
    Compiling cfg-if v1.0.0
-   Compiling indoc v2.0.5
    Compiling memoffset v0.8.0
-   Compiling quote v1.0.37
    Compiling pyo3-build-config v0.22.6
-   Compiling memmap2 v0.9.5
+   Compiling quote v1.0.37
    Compiling syn v2.0.96
+   Compiling memmap2 v0.9.5
    Compiling pyo3-ffi v0.22.6
    Compiling pyo3-macros-backend v0.22.6
    Compiling pyo3 v0.22.6
@@ -2809,7 +2845,7 @@
      = note: this warning originates in the macro `$crate::impl_exception_boilerplate` which comes from the expansion of the macro `pyo3::create_exception` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 warning: `safetensors-python` (lib) generated 2 warnings
-    Finished `release` profile [optimized] target(s) in 3m 10s
+    Finished `release` profile [optimized] target(s) in 39.96s
 📦 Built wheel for CPython 3.12 to /build/reproducible-path/safetensors-0.5.2/bindings/python/target/wheels/safetensors-0.4.5-cp312-cp312-linux_x86_64.whl
 /build/reproducible-path/safetensors-0.5.2/bindings/python/target/wheels/safetensors-0.4.5-cp312-cp312-linux_x86_64.whl
 Successfully built safetensors-0.4.5-cp312-cp312-linux_x86_64.whl
@@ -2862,7 +2898,7 @@
      = note: this warning originates in the macro `$crate::impl_exception_boilerplate` which comes from the expansion of the macro `pyo3::create_exception` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 warning: `safetensors-python` (lib) generated 2 warnings
-    Finished `release` profile [optimized] target(s) in 2m 24s
+    Finished `release` profile [optimized] target(s) in 33.61s
 📦 Built wheel for CPython 3.13 to /build/reproducible-path/safetensors-0.5.2/bindings/python/target/wheels/safetensors-0.4.5-cp313-cp313-linux_x86_64.whl
 /build/reproducible-path/safetensors-0.5.2/bindings/python/target/wheels/safetensors-0.4.5-cp313-cp313-linux_x86_64.whl
 Successfully built safetensors-0.4.5-cp313-cp313-linux_x86_64.whl
@@ -2910,16 +2946,16 @@
  diversion by libc6 from: /lib64/ld-linux-x86-64.so.2
 dpkg-shlibdeps: warning: diversions involved - output may be incorrect
  diversion by libc6 to: /lib64/ld-linux-x86-64.so.2.usr-is-merged
-dpkg-shlibdeps: warning: debian/python3-safetensors/usr/lib/python3/dist-packages/safetensors/_safetensors_rust.cpython-313-x86_64-linux-gnu.so contains an unresolvable reference to symbol PyObject_GetIter: it's probably a plugin
+dpkg-shlibdeps: warning: debian/python3-safetensors/usr/lib/python3/dist-packages/safetensors/_safetensors_rust.cpython-313-x86_64-linux-gnu.so contains an unresolvable reference to symbol PyByteArray_AsString: it's probably a plugin
 dpkg-shlibdeps: warning: 99 other similar warnings have been skipped (use -v to see them all)
-dpkg-shlibdeps: warning: debian/python3-safetensors/usr/lib/python3/dist-packages/safetensors/_safetensors_rust.cpython-312-x86_64-linux-gnu.so contains an unresolvable reference to symbol PyObject_GenericGetDict: it's probably a plugin
+dpkg-shlibdeps: warning: debian/python3-safetensors/usr/lib/python3/dist-packages/safetensors/_safetensors_rust.cpython-312-x86_64-linux-gnu.so contains an unresolvable reference to symbol PyExc_TypeError: it's probably a plugin
 dpkg-shlibdeps: warning: 100 other similar warnings have been skipped (use -v to see them all)
    dh_installdeb -O--buildsystem=pybuild -O--sourcedirectory=bindings/python
    dh_gencontrol -O--buildsystem=pybuild -O--sourcedirectory=bindings/python
    dh_md5sums -O--buildsystem=pybuild -O--sourcedirectory=bindings/python
    dh_builddeb -O--buildsystem=pybuild -O--sourcedirectory=bindings/python
-dpkg-deb: building package 'python3-safetensors-dbgsym' in '../python3-safetensors-dbgsym_0.5.2-1_amd64.deb'.
 dpkg-deb: building package 'python3-safetensors' in '../python3-safetensors_0.5.2-1_amd64.deb'.
+dpkg-deb: building package 'python3-safetensors-dbgsym' in '../python3-safetensors-dbgsym_0.5.2-1_amd64.deb'.
  dpkg-genbuildinfo --build=binary -O../safetensors_0.5.2-1_amd64.buildinfo
  dpkg-genchanges --build=binary -O../safetensors_0.5.2-1_amd64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -2927,12 +2963,14 @@
 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/2872461/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2872461/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/3237463 and its subdirectories
-I: Current time: Mon Feb 17 04:09:54 -12 2025
-I: pbuilder-time-stamp: 1739808594
+I: removing directory /srv/workspace/pbuilder/2872461 and its subdirectories
+I: Current time: Mon Mar 23 12:39:40 +14 2026
+I: pbuilder-time-stamp: 1774219180