Diff of the two buildlogs:

--
--- b1/build.log	2023-04-26 13:36:42.689718910 +0000
+++ b2/build.log	2023-04-26 13:37:36.423334673 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue May 28 07:58:13 -12 2024
-I: pbuilder-time-stamp: 1716926293
+I: Current time: Thu Apr 27 03:36:46 +14 2023
+I: pbuilder-time-stamp: 1682516206
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/bookworm-reproducible-base.tgz]
 I: copying local configuration
@@ -16,7 +16,7 @@
 I: copying [./tetraproc_0.8.6.orig.tar.bz2]
 I: copying [./tetraproc_0.8.6-1.debian.tar.xz]
 I: Extracting source
-gpgv: Signature made Thu Oct  3 09:56:20 2019 -12
+gpgv: Signature made Fri Oct  4 11:56:20 2019 +14
 gpgv:                using RSA key F78CBA07817BB149A11D339069F2FC516EA71993
 gpgv: Can't check signature: No public key
 dpkg-source: warning: cannot verify inline signature for ./tetraproc_0.8.6-1.dsc: no acceptable signature found
@@ -27,52 +27,84 @@
 dpkg-source: info: applying 0001-Fix-makefile.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/23783/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/31768/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink16-arm64.
+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 27 03:36 /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/31768/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/31768/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="15" [3]="1" [4]="release" [5]="aarch64-unknown-linux-gnu")
+  BASH_VERSION='5.2.15(1)-release'
+  BUILDDIR=/build
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=8'
-  DISTRIBUTION='bookworm'
-  HOME='/var/lib/jenkins'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=bookworm
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/var/lib/jenkins
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  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='23783'
-  PS1='# '
-  PS2='> '
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=31768
   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.brBkjldu/pbuilderrc_bx1J --distribution bookworm --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.brBkjldu/b1 --logfile b1/build.log tetraproc_0.8.6-1.dsc'
-  SUDO_GID='117'
-  SUDO_UID='110'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  USERNAME='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.16:3128'
+  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.brBkjldu/pbuilderrc_F3PK --distribution bookworm --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/bookworm-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.brBkjldu/b2 --logfile b2/build.log --extrapackages usrmerge tetraproc_0.8.6-1.dsc'
+  SUDO_GID=117
+  SUDO_UID=110
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  USERNAME=root
+  _='I: set'
+  http_proxy=http://192.168.101.16:3128
 I: uname -a
-  Linux codethink15-arm64 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
+  Linux i-capture-the-hostname 4.15.0-209-generic #220-Ubuntu SMP Tue Mar 21 19:52:44 UTC 2023 aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 24 04:47 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/23783/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 27 00:25 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/31768/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -217,7 +249,7 @@
 Get: 93 http://deb.debian.org/debian bookworm/main arm64 libvorbisfile3 arm64 1.3.7-1 [25.4 kB]
 Get: 94 http://deb.debian.org/debian bookworm/main arm64 libvorbis-dev arm64 1.3.7-1 [321 kB]
 Get: 95 http://deb.debian.org/debian bookworm/main arm64 libsndfile1-dev arm64 1.2.0-1 [319 kB]
-Fetched 33.0 MB in 1s (28.5 MB/s)
+Fetched 33.0 MB in 1s (49.7 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
(Reading database ... 5%
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(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 19616 files and directories currently installed.)
@@ -611,8 +643,17 @@
 Writing extended state information...
 Building tag database...
  -> Finished parsing the build-deps
+Reading package lists...
+Building dependency tree...
+Reading state information...
+usrmerge is already the newest version (35).
+0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/tetraproc-0.8.6/ && 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  > ../tetraproc_0.8.6-1_source.changes
+I: user script /srv/workspace/pbuilder/31768/tmp/hooks/A99_set_merged_usr starting
+Re-configuring usrmerge...
+I: user script /srv/workspace/pbuilder/31768/tmp/hooks/A99_set_merged_usr finished
+hostname: Temporary failure in name resolution
+I: Running cd /build/tetraproc-0.8.6/ && 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  > ../tetraproc_0.8.6-1_source.changes
 dpkg-buildpackage: info: source package tetraproc
 dpkg-buildpackage: info: source version 0.8.6-1
 dpkg-buildpackage: info: source distribution unstable
@@ -644,7 +685,6 @@
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o convol44.o convol44.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o virtmic.o virtmic.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o hpfilt.o hpfilt.cc
-g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o pmfilt.o pmfilt.cc
 convol44.cc: In member function 'void Convdata::init(float*, unsigned int, unsigned int, float)':
 convol44.cc:79:24: warning: ignoring return value of 'int posix_memalign(void**, size_t, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
    79 |         posix_memalign (&v, 16, 2 * _part * sizeof (float));
@@ -674,6 +714,7 @@
 convol44.cc:187:24: warning: ignoring return value of 'int posix_memalign(void**, size_t, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
   187 |         posix_memalign (&v, 16, (_part + 1) * sizeof (fftwf_complex));
       |         ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o pmfilt.o pmfilt.cc
 filewin.cc: In constructor 'Filewin::Filewin(X_window*, X_callback*, X_resman*)':
 filewin.cc:90:17: warning: ignoring return value of 'char* getcwd(char*, size_t)' declared with attribute 'warn_unused_result' [-Wunused-result]
    90 |     else getcwd (_pres, 1024);
@@ -694,7 +735,6 @@
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o abconfig.o abconfig.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o abprocess.o abprocess.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o oscform.o oscform.cc
-g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o impdata.o impdata.cc
 confwin.cc: In member function 'virtual void Confwin::handle_callb(int, X_window*, XEvent*)':
 confwin.cc:222:15: warning: ignoring return value of 'int chdir(const char*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   222 |         chdir (_filewin->wdir ());
@@ -702,6 +742,7 @@
 confwin.cc:241:15: warning: ignoring return value of 'int chdir(const char*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   241 |         chdir (_filewin->wdir ());
       |         ~~~~~~^~~~~~~~~~~~~~~~~~~
+g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o impdata.o impdata.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o kmeter.o kmeter.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o kmeterdsp.o kmeterdsp.cc
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\" -I/usr/include/freetype2 -I/usr/include/libpng16   -c -o png2img.o png2img.cc
@@ -712,8 +753,8 @@
    42 |     fread (hdr, 1, 8, F);
       |     ~~~~~~^~~~~~~~~~~~~~
 g++ -g -O2 -ffile-prefix-map=/build/tetraproc-0.8.6=. -fstack-protector-strong -Wformat -Werror=format-security -O2 -Wall -ffast-math -Wdate-time -D_FORTIFY_SOURCE=2 -MMD -MP -DVERSION=\"0.8.6\" -DSHARED=\"/usr/share/tetraproc\"  -c -o dither.o dither.cc
-g++ -Wl,-z,relro -Wl,--as-needed -pthread -o tetraproc tetraproc.o styles.o mainwin.o jclient.o filewin.o convol44.o virtmic.o hpfilt.o pmfilt.o textmat.o confwin.o abconfig.o abprocess.o oscform.o impdata.o kmeter.o kmeterdsp.o png2img.o -lsndfile -lfftw3f -lclxclient -lclthreads -ljack -lpthread -lpng -lXft -lX11 -lrt 
 g++ -Wl,-z,relro -Wl,--as-needed -pthread -o tetrafile tetrafile.o convol44.o hpfilt.o pmfilt.o abconfig.o abprocess.o oscform.o impdata.o audiofile.o dither.o -lsndfile -lfftw3f -lrt 
+g++ -Wl,-z,relro -Wl,--as-needed -pthread -o tetraproc tetraproc.o styles.o mainwin.o jclient.o filewin.o convol44.o virtmic.o hpfilt.o pmfilt.o textmat.o confwin.o abconfig.o abprocess.o oscform.o impdata.o kmeter.o kmeterdsp.o png2img.o -lsndfile -lfftw3f -lclxclient -lclthreads -ljack -lpthread -lpng -lXft -lX11 -lrt 
 make[1]: Leaving directory '/build/tetraproc-0.8.6/source'
    dh_auto_test -O-Smakefile -O-Dsource
    create-stamp debian/debhelper-build-stamp
@@ -756,12 +797,14 @@
 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/31768/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/31768/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/23783 and its subdirectories
-I: Current time: Tue May 28 07:59:41 -12 2024
-I: pbuilder-time-stamp: 1716926381
+I: removing directory /srv/workspace/pbuilder/31768 and its subdirectories
+I: Current time: Thu Apr 27 03:37:35 +14 2023
+I: pbuilder-time-stamp: 1682516255