Diff of the two buildlogs:

--
--- b1/build.log	2025-03-08 02:27:32.299860868 +0000
+++ b2/build.log	2025-03-08 02:28:05.110384154 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Fri Mar  7 14:26:34 -12 2025
-I: pbuilder-time-stamp: 1741400794
+I: Current time: Fri Apr 10 22:50:34 +14 2026
+I: pbuilder-time-stamp: 1775811034
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,54 +25,86 @@
 dpkg-source: info: applying Makefile.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/28038/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/54768/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos6-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 Apr 10 08:50 /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/54768/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/54768/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=11 '
-  DISTRIBUTION='unstable'
-  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=21 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='67abc9c115b54b58bf40ecd666d515af'
-  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='28038'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=3af3a8623584456093ac637ecb440e95
+  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=54768
   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.mIfGqS7W/pbuilderrc_NqKo --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.mIfGqS7W/b1 --logfile b1/build.log opentelemetry-proto_1.5.0-1.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://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.mIfGqS7W/pbuilderrc_HOPB --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.mIfGqS7W/b2 --logfile b2/build.log opentelemetry-proto_1.5.0-1.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://213.165.73.152:3128
 I: uname -a
-  Linux ionos2-i386 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 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/28038/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Mar  4  2025 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/54768/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -182,7 +214,7 @@
 Get: 62 http://deb.debian.org/debian unstable/main i386 protobuf-compiler i386 3.21.12-10+b6 [84.9 kB]
 Get: 63 http://deb.debian.org/debian unstable/main i386 protobuf-compiler-grpc i386 1.51.1-5+b4 [43.2 kB]
 Get: 64 http://deb.debian.org/debian unstable/main i386 python3-all i386 3.13.2-2 [1044 B]
-Fetched 44.2 MB in 1s (75.7 MB/s)
+Fetched 44.2 MB in 1s (56.7 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libpython3.13-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 ... 19769 files and directories currently installed.)
@@ -405,8 +437,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Sat Mar  8 02:27:16 UTC 2025.
-Universal Time is now:  Sat Mar  8 02:27:16 UTC 2025.
+Local time is now:      Fri Apr 10 08:50:56 UTC 2026.
+Universal Time is now:  Fri Apr 10 08:50:56 UTC 2026.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -465,7 +497,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/opentelemetry-proto-1.5.0/ && 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  > ../opentelemetry-proto_1.5.0-1_source.changes
+I: user script /srv/workspace/pbuilder/54768/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/54768/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/opentelemetry-proto-1.5.0/ && 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  > ../opentelemetry-proto_1.5.0-1_source.changes
 dpkg-buildpackage: info: source package opentelemetry-proto
 dpkg-buildpackage: info: source version 1.5.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -494,29 +530,29 @@
 #ln -s /usr/bin/grpc_node_plugin /build/reproducible-path/opentelemetry-proto-1.5.0/debian/tmp/bin/protoc-gen-grpc-js
 #ln -s /usr/bin/grpc_objective_c_plugin /build/reproducible-path/opentelemetry-proto-1.5.0/debian/tmp/bin/protoc-gen-grpc-objc
 dh_auto_build
-	make -j11 "INSTALL=install --strip-program=true"
+	make -j21 "INSTALL=install --strip-program=true"
 make[2]: Entering directory '/build/reproducible-path/opentelemetry-proto-1.5.0'
-/bin/sh: 1: git: not found
+/bin/sh: line 1: git: command not found
 rm -rf ./gen/cpp
 rm -rf ./gen/python
 mkdir -p ./gen/cpp
 mkdir -p ./gen/python
-/usr/bin/protoc --python_out=./gen/python opentelemetry/proto/common/v1/common.proto
 /usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/common/v1/common.proto
+/usr/bin/protoc --python_out=./gen/python opentelemetry/proto/common/v1/common.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/logs/v1/logs.proto
-/usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/logs/v1/logs.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/metrics/v1/metrics.proto
+/usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/logs/v1/logs.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/profiles/v1development/profiles.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/resource/v1/resource.proto
-/usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/metrics/v1/metrics.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/trace/v1/trace.proto
+/usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/metrics/v1/metrics.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/collector/logs/v1/logs_service.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/collector/metrics/v1/metrics_service.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/collector/profiles/v1development/profiles_service.proto
 /usr/bin/protoc --python_out=./gen/python opentelemetry/proto/collector/trace/v1/trace_service.proto
 /usr/bin/protoc --python_out=./gen/python --grpc-python_out=./gen/python opentelemetry/proto/collector/trace/v1/trace_service.proto
-/usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/profiles/v1development/profiles.proto
 /usr/bin/protoc --python_out=./gen/python --grpc-python_out=./gen/python opentelemetry/proto/collector/metrics/v1/metrics_service.proto
+/usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/profiles/v1development/profiles.proto
 /usr/bin/protoc --python_out=./gen/python --grpc-python_out=./gen/python opentelemetry/proto/collector/logs/v1/logs_service.proto
 /usr/bin/protoc --python_out=./gen/python --grpc-python_out=./gen/python opentelemetry/proto/collector/profiles/v1development/profiles_service.proto
 /usr/bin/protoc --cpp_out=./gen/cpp opentelemetry/proto/resource/v1/resource.proto
@@ -548,13 +584,13 @@
    dh_installdeb
    dh_gencontrol
 dpkg-gencontrol: warning: Depends field of package libopentelemetry-proto-dev: substitution variable ${shlibs:Depends} used, but is not defined
-dpkg-gencontrol: warning: Depends field of package python3-opentelemetry-proto: substitution variable ${shlibs:Depends} used, but is not defined
 dpkg-gencontrol: warning: Depends field of package opentelemetry-proto: substitution variable ${shlibs:Depends} used, but is not defined
+dpkg-gencontrol: warning: Depends field of package python3-opentelemetry-proto: substitution variable ${shlibs:Depends} used, but is not defined
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'python3-opentelemetry-proto' in '../python3-opentelemetry-proto_1.5.0-1_all.deb'.
 dpkg-deb: building package 'opentelemetry-proto' in '../opentelemetry-proto_1.5.0-1_all.deb'.
 dpkg-deb: building package 'libopentelemetry-proto-dev' in '../libopentelemetry-proto-dev_1.5.0-1_all.deb'.
+dpkg-deb: building package 'python3-opentelemetry-proto' in '../python3-opentelemetry-proto_1.5.0-1_all.deb'.
  dpkg-genbuildinfo --build=binary -O../opentelemetry-proto_1.5.0-1_i386.buildinfo
  dpkg-genchanges --build=binary -O../opentelemetry-proto_1.5.0-1_i386.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -562,12 +598,14 @@
 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/54768/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/54768/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/28038 and its subdirectories
-I: Current time: Fri Mar  7 14:27:31 -12 2025
-I: pbuilder-time-stamp: 1741400851
+I: removing directory /srv/workspace/pbuilder/54768 and its subdirectories
+I: Current time: Fri Apr 10 22:51:03 +14 2026
+I: pbuilder-time-stamp: 1775811063