Diff of the two buildlogs:

--
--- b1/build.log	2024-04-30 10:20:54.288023286 +0000
+++ b2/build.log	2024-04-30 10:27:14.343827775 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Jun  2 04:42:10 -12 2025
-I: pbuilder-time-stamp: 1748882530
+I: Current time: Wed May  1 00:20:57 +14 2024
+I: pbuilder-time-stamp: 1714472457
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking goverlay_1.0-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2126493/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2473667/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 Apr 30 10:21 /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/2473667/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2473667/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='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]="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=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='ebbb503e195044e9914f1e117c71a95a'
-  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='2126493'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=225538e5f7184f68b935b3962e1d1368
+  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=2473667
   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.szIHXUTo/pbuilderrc_pQHX --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.szIHXUTo/b1 --logfile b1/build.log goverlay_1.0-1.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://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.szIHXUTo/pbuilderrc_wYnq --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.szIHXUTo/b2 --logfile b2/build.log goverlay_1.0-1.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://46.16.76.132:3128
 I: uname -a
-  Linux ionos15-amd64 6.6.13+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.6.13-1~bpo12+1 (2024-02-15) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-20-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.85-1 (2024-04-11) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 31 14:05 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2126493/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 27 07:43 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2473667/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -417,7 +449,7 @@
 Get: 299 http://deb.debian.org/debian unstable/main amd64 lcl-qt5 amd64 3.0+dfsg1-8+b1 [33.7 kB]
 Get: 300 http://deb.debian.org/debian unstable/main amd64 libglx-dev amd64 1.7.0-1+b1 [15.8 kB]
 Get: 301 http://deb.debian.org/debian unstable/main amd64 libgl-dev amd64 1.7.0-1+b1 [101 kB]
-Fetched 279 MB in 9s (31.8 MB/s)
+Fetched 279 MB in 10s (26.5 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%
(Reading database ... 10%
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(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 ... 19694 files and directories currently installed.)
@@ -1543,8 +1575,8 @@
 Setting up tzdata (2024a-3) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Jun  2 16:43:18 UTC 2025.
-Universal Time is now:  Mon Jun  2 16:43:18 UTC 2025.
+Local time is now:      Tue Apr 30 10:25:51 UTC 2024.
+Universal Time is now:  Tue Apr 30 10:25:51 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up xtrans-dev (1.4.0-1) ...
@@ -1808,7 +1840,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/goverlay-1.0/ && 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  > ../goverlay_1.0-1_source.changes
+I: user script /srv/workspace/pbuilder/2473667/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2473667/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/goverlay-1.0/ && 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  > ../goverlay_1.0-1_source.changes
 dpkg-buildpackage: info: source package goverlay
 dpkg-buildpackage: info: source version 1.0-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1818,7 +1854,7 @@
  debian/rules clean
 dh clean
    dh_auto_clean
-	make -j42 clean
+	make -j20 clean
 make[1]: Entering directory '/build/reproducible-path/goverlay-1.0'
 rm -f goverlay
 rm -f start_goverlay.sh
@@ -1835,7 +1871,7 @@
    dh_autoreconf
    dh_auto_configure
    dh_auto_build
-	make -j42 "INSTALL=install --strip-program=true"
+	make -j20 "INSTALL=install --strip-program=true"
 make[1]: Entering directory '/build/reproducible-path/goverlay-1.0'
 lazbuild -B goverlay.lpi --bm=Release 
 sed s%@libexecdir@%.%g data/goverlay.sh.in > start_goverlay.sh
@@ -1986,7 +2022,7 @@
 /usr/lib/lazarus/3.0/components/freetype/freetypelaz.pas(12,84) Hint: (5023) Unit "TTRaster" not used in freetypelaz
 /usr/lib/lazarus/3.0/components/freetype/freetypelaz.pas(12,94) Hint: (5023) Unit "TTTables" not used in freetypelaz
 /usr/lib/lazarus/3.0/components/freetype/freetypelaz.pas(12,104) Hint: (5023) Unit "TTTypes" not used in freetypelaz
-(1008) 24159 lines compiled, 0.6 sec
+(1008) 24159 lines compiled, 1.1 sec
 (1021) 4 warning(s) issued
 (1022) 88 hint(s) issued
 (1023) 14 note(s) issued
@@ -2146,7 +2182,7 @@
 (3104) Compiling customdrawn_android.pas
 (3104) Compiling customdrawn_mac.pas
 (3104) Compiling lclexceptionstacktrace.pas
-(1008) 222038 lines compiled, 10.5 sec
+(1008) 222038 lines compiled, 23.0 sec
 (1021) 24 warning(s) issued
 Warning: (lazarus) [TLazPackageGraph.ConvertPackageRSTFiles] skipping read only directory /usr/lib/lazarus/3.0/lcl/languages/
 Hint: (11030) Start of reading config file /etc/fpc.cfg
@@ -2653,7 +2689,7 @@
 /usr/lib/lazarus/3.0/lcl/interfaces/./qt5/alllclintfunits.pas(27,3) Hint: (5023) Unit "qtobjects" not used in AllLCLIntfUnits
 /usr/lib/lazarus/3.0/lcl/interfaces/./qt5/alllclintfunits.pas(28,3) Hint: (5023) Unit "QtWSCheckLst" not used in AllLCLIntfUnits
 /usr/lib/lazarus/3.0/lcl/interfaces/./qt5/alllclintfunits.pas(29,3) Hint: (5023) Unit "QtWSStdCtrls" not used in AllLCLIntfUnits
-(1008) 68313 lines compiled, 2.7 sec
+(1008) 68313 lines compiled, 4.9 sec
 (1021) 70 warning(s) issued
 (1022) 374 hint(s) issued
 (1023) 23 note(s) issued
@@ -2679,7 +2715,7 @@
 /usr/lib/lazarus/3.0/components/opengl/glqtcontext.pas(32,25) Hint: (5023) Unit "qtproc" not used in GLQTContext
 /usr/lib/lazarus/3.0/components/opengl/glqtcontext.pas(33,3) Hint: (5023) Unit "QtWSControls" not used in GLQTContext
 /usr/lib/lazarus/3.0/components/opengl/openglcontext.pas(724,57) Note: (6058) Call to subroutine "function TWSLCLComponent.WSPrivate:Class Of TWSPrivate;" marked as inline is not inlined
-(1008) 1496 lines compiled, 0.6 sec
+(1008) 1496 lines compiled, 0.9 sec
 (1022) 13 hint(s) issued
 (1023) 1 note(s) issued
 Hint: (11030) Start of reading config file /etc/fpc.cfg
@@ -2746,7 +2782,7 @@
 /build/reproducible-path/goverlay-1.0/overlayunit.pas(10,42) Hint: (5023) Unit "customeffectsunit" not used in overlayunit
 (9022) Compiling resource /build/reproducible-path/goverlay-1.0/lib/x86_64-linux/goverlay.or
 (9015) Linking /build/reproducible-path/goverlay-1.0/goverlay
-(1008) 2888 lines compiled, 2.2 sec
+(1008) 2888 lines compiled, 3.8 sec
 (1021) 14 warning(s) issued
 (1022) 36 hint(s) issued
 (1023) 3 note(s) issued
@@ -2757,7 +2793,7 @@
    debian/rules override_dh_auto_install
 make[1]: Entering directory '/build/reproducible-path/goverlay-1.0'
 dh_auto_install -- prefix=/usr bindir=/games
-	make -j42 install DESTDIR=/build/reproducible-path/goverlay-1.0/debian/goverlay AM_UPDATE_INFO_DIR=no "INSTALL=install --strip-program=true" prefix=/usr bindir=/games
+	make -j20 install DESTDIR=/build/reproducible-path/goverlay-1.0/debian/goverlay AM_UPDATE_INFO_DIR=no "INSTALL=install --strip-program=true" prefix=/usr bindir=/games
 make[2]: Entering directory '/build/reproducible-path/goverlay-1.0'
 sed s%@libexecdir@%/usr/libexec%g data/goverlay.sh.in > data/goverlay.sh
 install -D -m=755 goverlay /build/reproducible-path/goverlay-1.0/debian/goverlay/usr/libexec/goverlay
@@ -2797,12 +2833,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: including full source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/2473667/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2473667/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/2126493 and its subdirectories
-I: Current time: Mon Jun  2 04:43:53 -12 2025
-I: pbuilder-time-stamp: 1748882633
+I: removing directory /srv/workspace/pbuilder/2473667 and its subdirectories
+I: Current time: Wed May  1 00:27:13 +14 2024
+I: pbuilder-time-stamp: 1714472833