Diff of the two buildlogs:

--
--- b1/build.log	2025-02-16 04:59:05.989697152 +0000
+++ b2/build.log	2025-02-16 05:01:21.871554033 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Feb 15 16:57:19 -12 2025
-I: pbuilder-time-stamp: 1739681839
+I: Current time: Sun Mar 22 01:22:07 +14 2026
+I: pbuilder-time-stamp: 1774092127
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -24,52 +24,84 @@
 dpkg-source: info: applying 001_replace-simplecov-formatter.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/760918/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/3621763/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos5-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 21 11:22 /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/3621763/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/3621763/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='trixie'
-  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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='13edba1e46824528b6c19fe03eb6f94a'
-  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='760918'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=c6dc9c5fd06646c58f6abb11108c7d4b
+  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=3621763
   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.66lnjY2N/pbuilderrc_E4UW --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.66lnjY2N/b1 --logfile b1/build.log ruby-ref_2.0.0-2.dsc'
-  SUDO_GID='110'
-  SUDO_UID='105'
-  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.66lnjY2N/pbuilderrc_CnjK --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.66lnjY2N/b2 --logfile b2/build.log ruby-ref_2.0.0-2.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  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 ionos1-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/760918/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/3621763/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -274,7 +306,7 @@
 Get: 159 http://deb.debian.org/debian trixie/main amd64 ruby-rspec-expectations all 3.13.0c0e0m0s1-2 [90.2 kB]
 Get: 160 http://deb.debian.org/debian trixie/main amd64 ruby-rspec-mocks all 3.13.0c0e0m0s1-2 [81.3 kB]
 Get: 161 http://deb.debian.org/debian trixie/main amd64 ruby-rspec all 3.13.0c0e0m0s1-2 [5184 B]
-Fetched 50.4 MB in 5s (9570 kB/s)
+Fetched 50.4 MB in 1s (40.4 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-minimal:amd64.
 (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 ... 19808 files and directories currently installed.)
@@ -805,8 +837,8 @@
 Setting up tzdata (2024b-6) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sun Feb 16 04:58:28 UTC 2025.
-Universal Time is now:  Sun Feb 16 04:58:28 UTC 2025.
+Local time is now:      Sat Mar 21 11:23:10 UTC 2026.
+Universal Time is now:  Sat Mar 21 11:23:10 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up ruby-minitest (5.25.4-2) ...
@@ -953,7 +985,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/ruby-ref-2.0.0/ && 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  > ../ruby-ref_2.0.0-2_source.changes
+I: user script /srv/workspace/pbuilder/3621763/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/3621763/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/ruby-ref-2.0.0/ && 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  > ../ruby-ref_2.0.0-2_source.changes
 dpkg-buildpackage: info: source package ruby-ref
 dpkg-buildpackage: info: source version 2.0.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1026,33 +1062,12 @@
 /usr/bin/ruby3.3 -I/usr/share/rubygems-integration/all/gems/rspec-support-3.13.1/lib:/usr/share/rubygems-integration/all/gems/rspec-core-3.13.0/lib /usr/share/rubygems-integration/all/gems/rspec-core-3.13.0/exe/rspec --pattern ./spec/\*\*/\*_spec.rb --format documentation
 /build/reproducible-path/ruby-ref-2.0.0/spec/spec_helper.rb:4:in `<top (required)>': [DEPRECATION] ::[] is deprecated. Use ::new instead.
 
-Randomized with seed 57322
+Randomized with seed 35296
 
-Ref::ReferenceQueue
-  #push
-    when the queue is not empty
-      is expected not to be empty
-      is expected to equal 2
-    when the queue is empty
-      is expected to be empty
-      is expected to equal 0
-  #pop
-    when the queue is not empty
-      is expected to equal <#Ref::WeakReference: #<Object:0x00007f11fd10cde8>>
-    when the queue is empty
-      is expected to be nil
-  references are added when the object has been collected
-    is expected to eq 3620
-  #shift
-    when the queue is empty
-      is expected to be nil
-    when the queue is not empty
-      is expected to equal <#Ref::WeakReference: #<Object:0x00007f11fd1e5ee0>>
-  references are added immediately if the_object has been collected
-    is expected to equal <#Ref::Mock::MockWeakReference: #3680 (not accessible)>
-
-Ref::WeakReference
+Ref::SoftReference
   #object
+    when references are not collected immediately
+      the object can't be nil
     when has a lot of objects
       get the correct object
     when has not garbage collected objects
@@ -1061,163 +1076,184 @@
     when GC is called
       inspects not be nil
 
-Ref::Mock
-  gc with no argument
-    is expected to be nil
-  gc with argument
-    is expected to equal #<Object:0x00007f11fc5ea118>
-
-Ref::StrongReference
-  #object
-    is expected to equal #<Object:0x00007f11fc5e72d8>
-    is expected to equal 2003860
-  #inspect
-    is expected not to be empty
-
-Ref::WeakKeyMap
-  behaves like a reference key map
-    removes entries that have been garbage collected
+Ref::WeakValueMap
+  behaves like a reference value map
+    can delete entries
       is expected to be nil
-    can interate over all entries
-      is expected to eq ["value 1", "value 3"]
-    can turn into a hash
-      is expected to eq [[#<Object:0x00007f11fc61b010>, "value 1"], [#<Object:0x00007f11fc61ac28>, "value 3"]]
-    keeps entries with strong references
-      is expected to eq "value 2"
-    can turn into an array
-      is expected to eq [[#<Object:0x00007f11fc615ef8>, "value 1"], [#<Object:0x00007f11fc615b10>, "value 3"]]
     #merge
+      returns a deep copy when merging an empty hash
+      updates all members with the new values from a given hash
       retains the value for all members without values in the given hash
+      returns a new object
       adds members not in the original hash
       calls the given block for each key in `other`
-      updates all members with the new values from a given hash
-      returns a new object
-      returns a deep copy when merging an empty hash
-    inspect
-      is expected not to be nil
-    can delete entries
+    can merge in another hash
+      is expected to eq "value 3"
+    can get all values
+      is expected to eq ["value 1", "value 3"]
+    removes entries that have been garbage collected
       is expected to be nil
-    can get all keys
-      is expected to eq [#<Object:0x00007f11fc6242a0>]
     size
       is expected to eq 1
-    can merge in another hash
-      is expected to eq "value 3"
+    keeps entries with strong references
+      is expected to eq "value 2"
+    can interate over all entries
+      is expected to eq ["value 1", "value 3"]
+    can turn into an array
+      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
+    inspect
+      is expected not to be nil
+    can turn into a hash
+      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
     can clear the map
       is expected to be nil
 
-Ref::SoftReference
-  #object
-    when has not garbage collected objects
-      gets the object
-    when references are not collected immediately
-      the object can't be nil
-    when has a lot of objects
-      get the correct object
-  #inspect
-    when GC is called
-      inspects not be nil
+Ref::ReferenceQueue
+  #pop
+    when the queue is not empty
+      is expected to equal <#Ref::WeakReference: #<Object:0x00007ff558617470>>
+    when the queue is empty
+      is expected to be nil
+  #push
+    when the queue is not empty
+      is expected to equal 2
+      is expected not to be empty
+    when the queue is empty
+      is expected to be empty
+      is expected to equal 0
+  references are added when the object has been collected
+    is expected to eq 2006820
+  #shift
+    when the queue is not empty
+      is expected to equal <#Ref::WeakReference: #<Object:0x00007ff55864e0b0>>
+    when the queue is empty
+      is expected to be nil
+  references are added immediately if the_object has been collected
+    is expected to equal <#Ref::Mock::MockWeakReference: #2006880 (not accessible)>
 
 Ref::SoftKeyMap
   behaves like a reference key map
-    can clear the map
+    #merge
+      calls the given block for each key in `other`
+      returns a new object
+      retains the value for all members without values in the given hash
+      returns a deep copy when merging an empty hash
+      adds members not in the original hash
+      updates all members with the new values from a given hash
+    removes entries that have been garbage collected
       is expected to be nil
     can delete entries
       is expected to be nil
     can turn into an array
-      is expected to eq [[#<Object:0x00007f11fc4948b8>, "value 1"], [#<Object:0x00007f11fc494368>, "value 3"]]
-    can get all keys
-      is expected to eq [#<Object:0x00007f11fc4903a8>]
-    #merge
-      adds members not in the original hash
-      returns a deep copy when merging an empty hash
-      returns a new object
-      updates all members with the new values from a given hash
-      calls the given block for each key in `other`
-      retains the value for all members without values in the given hash
-    size
-      is expected to eq 1
+      is expected to eq [[#<Object:0x00007ff55867e710>, "value 1"], [#<Object:0x00007ff55867e1e8>, "value 3"]]
     can interate over all entries
       is expected to eq ["value 1", "value 3"]
-    inspect
-      is expected not to be nil
     can merge in another hash
       is expected to eq "value 3"
-    can turn into a hash
-      is expected to eq [[#<Object:0x00007f11fc4c2268>, "value 1"], [#<Object:0x00007f11fc4c1d40>, "value 3"]]
+    can clear the map
+      is expected to be nil
+    size
+      is expected to eq 1
     keeps entries with strong references
       is expected to eq "value 2"
-    removes entries that have been garbage collected
-      is expected to be nil
+    can turn into a hash
+      is expected to eq [[#<Object:0x00007ff55869aeb0>, "value 1"], [#<Object:0x00007ff55869a960>, "value 3"]]
+    inspect
+      is expected not to be nil
+    can get all keys
+      is expected to eq [#<Object:0x00007ff5586942e0>]
 
-Ref::WeakValueMap
-  behaves like a reference value map
-    can merge in another hash
-      is expected to eq "value 3"
-    removes entries that have been garbage collected
-      is expected to be nil
-    can get all values
-      is expected to eq ["value 1", "value 3"]
-    can clear the map
-      is expected to be nil
+Ref::WeakKeyMap
+  behaves like a reference key map
+    can turn into a hash
+      is expected to eq [[#<Object:0x00007ff5586ae118>, "value 1"], [#<Object:0x00007ff5586ada60>, "value 3"]]
+    size
+      is expected to eq 1
     can interate over all entries
       is expected to eq ["value 1", "value 3"]
+    keeps entries with strong references
+      is expected to eq "value 2"
     can delete entries
       is expected to be nil
-    inspect
-      is expected not to be nil
+    can merge in another hash
+      is expected to eq "value 3"
     #merge
-      calls the given block for each key in `other`
-      updates all members with the new values from a given hash
+      retains the value for all members without values in the given hash
+      adds members not in the original hash
       returns a deep copy when merging an empty hash
+      updates all members with the new values from a given hash
       returns a new object
-      adds members not in the original hash
-      retains the value for all members without values in the given hash
-    can turn into a hash
-      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
-    keeps entries with strong references
-      is expected to eq "value 2"
+      calls the given block for each key in `other`
     can turn into an array
-      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
-    size
-      is expected to eq 1
+      is expected to eq [[#<Object:0x00007ff5586dc6f8>, "value 1"], [#<Object:0x00007ff5586dc1d0>, "value 3"]]
+    inspect
+      is expected not to be nil
+    can get all keys
+      is expected to eq [#<Object:0x00007ff5586d5b50>]
+    can clear the map
+      is expected to be nil
+    removes entries that have been garbage collected
+      is expected to be nil
+
+Ref::WeakReference
+  #inspect
+    when GC is called
+      inspects not be nil
+  #object
+    when has a lot of objects
+      get the correct object
+    when has not garbage collected objects
+      gets the object
+
+Ref::Mock
+  gc with no argument
+    is expected to be nil
+  gc with argument
+    is expected to equal #<Object:0x00007ff5591bf818>
 
 Ref::SoftValueMap
   behaves like a reference value map
-    can get all values
-      is expected to eq ["value 1", "value 3"]
-    can clear the map
+    removes entries that have been garbage collected
       is expected to be nil
-    can turn into an array
-      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
+    size
+      is expected to eq 1
     inspect
       is expected not to be nil
-    can delete entries
-      is expected to be nil
     #merge
+      calls the given block for each key in `other`
       adds members not in the original hash
-      updates all members with the new values from a given hash
-      retains the value for all members without values in the given hash
       returns a deep copy when merging an empty hash
+      updates all members with the new values from a given hash
       returns a new object
-      calls the given block for each key in `other`
-    can turn into a hash
-      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
+      retains the value for all members without values in the given hash
     can merge in another hash
       is expected to eq "value 3"
-    size
-      is expected to eq 1
-    removes entries that have been garbage collected
-      is expected to be nil
+    can get all values
+      is expected to eq ["value 1", "value 3"]
     can interate over all entries
       is expected to eq ["value 1", "value 3"]
+    can turn into an array
+      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
+    can clear the map
+      is expected to be nil
     keeps entries with strong references
       is expected to eq "value 2"
+    can turn into a hash
+      is expected to eq [["key 1", "value 1"], ["key 3", "value 3"]]
+    can delete entries
+      is expected to be nil
+
+Ref::StrongReference
+  #inspect
+    is expected not to be empty
+  #object
+    is expected to equal 4010140
+    is expected to equal #<Object:0x00007ff559190ea0>
 
-Finished in 14.66 seconds (files took 0.50898 seconds to load)
+Finished in 26.06 seconds (files took 0.99676 seconds to load)
 90 examples, 0 failures
 
-Randomized with seed 57322
+Randomized with seed 35296
 
 [Coveralls] Outside the CI environment, not sending data.
 
@@ -1249,12 +1285,14 @@
 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/3621763/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3621763/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/760918 and its subdirectories
-I: Current time: Sat Feb 15 16:59:05 -12 2025
-I: pbuilder-time-stamp: 1739681945
+I: removing directory /srv/workspace/pbuilder/3621763 and its subdirectories
+I: Current time: Sun Mar 22 01:24:20 +14 2026
+I: pbuilder-time-stamp: 1774092260