Diff of the two buildlogs:

--
--- b1/build.log	2024-05-22 10:19:26.999915660 +0000
+++ b2/build.log	2024-05-22 10:22:21.904492443 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Jun 24 04:41:29 -12 2025
-I: pbuilder-time-stamp: 1750783289
+I: Current time: Thu May 23 00:19:30 +14 2024
+I: pbuilder-time-stamp: 1716373170
 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: unpacking gsound_1.0.3-3.2.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/1618583/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/576861/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos11-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 May 22 10:19 /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/576861/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/576861/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=42 '
-  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]="21" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.21(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=20 '
+  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='23b70d76e5c8476fb557e3990f86c0df'
-  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='1618583'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=a9986af3f8cf49a7a29958007e3f5f0a
+  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=576861
   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.r9K6TLoU/pbuilderrc_Y6wK --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.r9K6TLoU/b1 --logfile b1/build.log gsound_1.0.3-3.2.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://213.165.73.152:3128'
+  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.r9K6TLoU/pbuilderrc_jrAx --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.r9K6TLoU/b2 --logfile b2/build.log gsound_1.0.3-3.2.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos5-amd64 6.7.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1~bpo12+1 (2024-05-06) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Jun 22 17:46 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/1618583/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 May 19 11:24 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/576861/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -261,7 +293,7 @@
 Get: 137 http://deb.debian.org/debian trixie/main amd64 valac-0.56-vapi all 0.56.17-1 [1078 kB]
 Get: 138 http://deb.debian.org/debian trixie/main amd64 valac-bin amd64 0.56.17-1 [336 kB]
 Get: 139 http://deb.debian.org/debian trixie/main amd64 valac amd64 0.56.17-1 [432 kB]
-Fetched 54.3 MB in 3s (17.3 MB/s)
+Fetched 54.3 MB in 2s (24.6 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libpython3.11-minimal:amd64.
 (Reading database ... 
(Reading database ... 5%
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(Reading database ... 45%
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(Reading database ... 55%
(Reading database ... 60%
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(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19701 files and directories currently installed.)
@@ -716,8 +748,8 @@
 Setting up tzdata (2024a-4) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Tue Jun 24 16:41:59 UTC 2025.
-Universal Time is now:  Tue Jun 24 16:41:59 UTC 2025.
+Local time is now:      Wed May 22 10:21:27 UTC 2024.
+Universal Time is now:  Wed May 22 10:21:27 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libsysprof-capture-4-dev:amd64 (46.0-1) ...
@@ -853,7 +885,11 @@
 fakeroot is already the newest version (1.33-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/reproducible-path/gsound-1.0.3/ && 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  > ../gsound_1.0.3-3.2_source.changes
+I: user script /srv/workspace/pbuilder/576861/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/576861/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/gsound-1.0.3/ && 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  > ../gsound_1.0.3-3.2_source.changes
 dpkg-buildpackage: info: source package gsound
 dpkg-buildpackage: info: source version 1.0.3-3.2
 dpkg-buildpackage: info: source distribution unstable
@@ -930,7 +966,7 @@
 Found ninja-1.11.1 at /usr/bin/ninja
 make[1]: Leaving directory '/build/reproducible-path/gsound-1.0.3'
    dh_auto_build
-	cd obj-x86_64-linux-gnu && LC_ALL=C.UTF-8 ninja -j42 -v
+	cd obj-x86_64-linux-gnu && LC_ALL=C.UTF-8 ninja -j20 -v
 [1/9] cc -Igsound/libgsound.so.0.0.2.p -Igsound -I../gsound -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/sysprof-6 -I/usr/include/libmount -I/usr/include/blkid -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -fno-strict-aliasing -Wcast-align -Wmissing-declarations -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Werror=format=2 -Werror=implicit-function-declaration -Werror=init-self -Werror=missing-include-dirs -Werror=missing-prototypes -Werror=pointer-arith -Werror=return-type -Wstrict-prototypes -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/gsound-1.0.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -D_REENTRANT -pthread -MD -MQ gsound/libgsound.so.0.0.2.p/gsound-context.c.o -MF gsound/libgsound.so.0.0.2.p/gsound-context.c.o.d -o gsound/libgsound.so.0.0.2.p/gsound-context.c.o -c ../gsound/gsound-context.c
 [2/9] cc  -o gsound/libgsound.so.0.0.2 gsound/libgsound.so.0.0.2.p/gsound-context.c.o -Wl,--as-needed -Wl,--no-undefined -shared -fPIC -Wl,-soname,libgsound.so.0 -Wl,-z,relro -Wl,-z,now -Wl,-O1 -Wl,-z,defs -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/gsound-1.0.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,--start-group /usr/lib/x86_64-linux-gnu/libgobject-2.0.so /usr/lib/x86_64-linux-gnu/libglib-2.0.so /usr/lib/x86_64-linux-gnu/libgio-2.0.so /usr/lib/x86_64-linux-gnu/libcanberra.so -Wl,--end-group
 [3/9] /usr/bin/meson --internal symbolextractor /build/reproducible-path/gsound-1.0.3/obj-x86_64-linux-gnu gsound/libgsound.so.0.0.2 gsound/libgsound.so.0.0.2 gsound/libgsound.so.0.0.2.p/libgsound.so.0.0.2.symbols 
@@ -950,7 +986,7 @@
       |                         ^~~~~~~~~~~~~~
 [9/9] cc  -o tools/gsound-play tools/gsound-play.p/meson-generated_gsound-play.c.o -Wl,--as-needed -Wl,--no-undefined -Wl,-z,relro -Wl,-z,now -Wl,-O1 -Wl,-z,defs -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/gsound-1.0.3=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 '-Wl,-rpath,$ORIGIN/../gsound' -Wl,-rpath-link,/build/reproducible-path/gsound-1.0.3/obj-x86_64-linux-gnu/gsound -Wl,--start-group gsound/libgsound.so.0.0.2 /usr/lib/x86_64-linux-gnu/libgio-2.0.so /usr/lib/x86_64-linux-gnu/libgobject-2.0.so /usr/lib/x86_64-linux-gnu/libglib-2.0.so -Wl,--end-group
    dh_auto_test
-	cd obj-x86_64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb LC_ALL=C.UTF-8 MESON_TESTTHREADS=42 meson test
+	cd obj-x86_64-linux-gnu && DEB_PYTHON_INSTALL_LAYOUT=deb LC_ALL=C.UTF-8 MESON_TESTTHREADS=20 meson test
 No tests defined.
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
@@ -1001,13 +1037,13 @@
 dpkg-gencontrol: warning: package libgsound-dev: substitution variable ${gir:Provides} unused, but is defined
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'gsound-tools' in '../gsound-tools_1.0.3-3.2_amd64.deb'.
 dpkg-deb: building package 'gsound-tools-dbgsym' in '../gsound-tools-dbgsym_1.0.3-3.2_amd64.deb'.
-dpkg-deb: building package 'libgsound0t64-dbgsym' in '../libgsound0t64-dbgsym_1.0.3-3.2_amd64.deb'.
 dpkg-deb: building package 'libgsound0t64' in '../libgsound0t64_1.0.3-3.2_amd64.deb'.
+dpkg-deb: building package 'gsound-tools' in '../gsound-tools_1.0.3-3.2_amd64.deb'.
+dpkg-deb: building package 'libgsound0t64-dbgsym' in '../libgsound0t64-dbgsym_1.0.3-3.2_amd64.deb'.
 dpkg-deb: building package 'libgsound-dev' in '../libgsound-dev_1.0.3-3.2_amd64.deb'.
-dpkg-deb: building package 'gir1.2-gsound-1.0' in '../gir1.2-gsound-1.0_1.0.3-3.2_amd64.deb'.
 dpkg-deb: building package 'libgsound-doc' in '../libgsound-doc_1.0.3-3.2_all.deb'.
+dpkg-deb: building package 'gir1.2-gsound-1.0' in '../gir1.2-gsound-1.0_1.0.3-3.2_amd64.deb'.
  dpkg-genbuildinfo --build=binary -O../gsound_1.0.3-3.2_amd64.buildinfo
  dpkg-genchanges --build=binary -O../gsound_1.0.3-3.2_amd64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1015,12 +1051,14 @@
 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/576861/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/576861/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/1618583 and its subdirectories
-I: Current time: Tue Jun 24 04:42:26 -12 2025
-I: pbuilder-time-stamp: 1750783346
+I: removing directory /srv/workspace/pbuilder/576861 and its subdirectories
+I: Current time: Thu May 23 00:22:21 +14 2024
+I: pbuilder-time-stamp: 1716373341