Diff of the two buildlogs:

--
--- b1/build.log	2025-01-26 17:37:33.425037308 +0000
+++ b2/build.log	2025-01-26 17:38:30.230468044 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Feb 28 11:59:52 -12 2026
-I: pbuilder-time-stamp: 1772323192
+I: Current time: Mon Jan 27 07:37:35 +14 2025
+I: pbuilder-time-stamp: 1737913055
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -24,51 +24,83 @@
 dpkg-source: info: applying avoid_infinite_loop_on_arm.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3535271/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2073502/tmp/hooks/D01_modify_environment starting
+debug: Running on infom01-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 Jan 26 17:37 /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/2073502/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2073502/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'
+  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=12 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  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='43552fd393a7431089e435bf50efc2b7'
-  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='3535271'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=3a5aba082bd14ccabf4b1bb974751d62
+  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=2073502
   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.I0KkoEx1/pbuilderrc_1WSA --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.I0KkoEx1/b1 --logfile b1/build.log qqwing_1.3.4-3.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
+  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.I0KkoEx1/pbuilderrc_XfPv --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.I0KkoEx1/b2 --logfile b2/build.log qqwing_1.3.4-3.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
 I: uname -a
-  Linux infom02-amd64 6.12.9+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.9-1~bpo12+1 (2025-01-19) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.124-1 (2025-01-12) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3535271/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2073502/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -134,7 +166,7 @@
 Get: 28 http://deb.debian.org/debian unstable/main amd64 intltool-debian all 0.35.0+20060710.6 [22.9 kB]
 Get: 29 http://deb.debian.org/debian unstable/main amd64 po-debconf all 1.0.21+nmu1 [248 kB]
 Get: 30 http://deb.debian.org/debian unstable/main amd64 debhelper all 13.24.1 [920 kB]
-Fetched 20.5 MB in 0s (80.2 MB/s)
+Fetched 20.5 MB in 1s (35.3 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package sensible-utils.
 (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 ... 19832 files and directories currently installed.)
@@ -269,7 +301,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/qqwing-1.3.4/ && 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  > ../qqwing_1.3.4-3_source.changes
+I: user script /srv/workspace/pbuilder/2073502/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2073502/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/qqwing-1.3.4/ && 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  > ../qqwing_1.3.4-3_source.changes
 dpkg-buildpackage: info: source package qqwing
 dpkg-buildpackage: info: source version 1.3.4-3
 dpkg-buildpackage: info: source distribution unstable
@@ -422,14 +458,14 @@
 make  all-am
 make[2]: Entering directory '/build/reproducible-path/qqwing-1.3.4'
 g++ -DHAVE_CONFIG_H -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o main.o main.cpp
-/bin/bash ./libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o qqwing.lo qqwing.cpp
+/bin/sh ./libtool  --tag=CXX   --mode=compile g++ -DHAVE_CONFIG_H -I.   -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c -o qqwing.lo qqwing.cpp
 libtool: compile:  g++ -DHAVE_CONFIG_H -I. -Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -c qqwing.cpp  -fPIC -DPIC -o .libs/qqwing.o
-/bin/bash ./libtool  --tag=CXX   --mode=link g++  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -no-undefined -version-info 3:0:1 -Wl,-z,relro -Wl,-z,now -o libqqwing.la -rpath /usr/lib/x86_64-linux-gnu qqwing.lo  
+/bin/sh ./libtool  --tag=CXX   --mode=link g++  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -no-undefined -version-info 3:0:1 -Wl,-z,relro -Wl,-z,now -o libqqwing.la -rpath /usr/lib/x86_64-linux-gnu qqwing.lo  
 libtool: link: g++  -fPIC -DPIC -shared -nostdlib /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/crti.o /usr/lib/gcc/x86_64-linux-gnu/14/crtbeginS.o  .libs/qqwing.o   -L/usr/lib/gcc/x86_64-linux-gnu/14 -L/usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu -L/usr/lib/gcc/x86_64-linux-gnu/14/../../../../lib -L/lib/x86_64-linux-gnu -L/lib/../lib -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/x86_64-linux-gnu/14/../../.. -lstdc++ -lm -lc -lgcc_s /usr/lib/gcc/x86_64-linux-gnu/14/crtendS.o /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/crtn.o  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -Werror=format-security -Wl,-z -Wl,relro -Wl,-z -Wl,now   -Wl,-soname -Wl,libqqwing.so.2 -o .libs/libqqwing.so.2.1.0
 libtool: link: (cd ".libs" && rm -f "libqqwing.so.2" && ln -s "libqqwing.so.2.1.0" "libqqwing.so.2")
 libtool: link: (cd ".libs" && rm -f "libqqwing.so" && ln -s "libqqwing.so.2.1.0" "libqqwing.so")
 libtool: link: ( cd ".libs" && rm -f "libqqwing.la" && ln -s "../libqqwing.la" "libqqwing.la" )
-/bin/bash ./libtool  --tag=CXX   --mode=link g++  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection  -Wl,-z,relro -Wl,-z,now -o qqwing main.o ./libqqwing.la 
+/bin/sh ./libtool  --tag=CXX   --mode=link g++  -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection  -Wl,-z,relro -Wl,-z,now -o qqwing main.o ./libqqwing.la 
 libtool: link: g++ -g -O2 -ffile-prefix-map=/build/reproducible-path/qqwing-1.3.4=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wl,-z -Wl,relro -Wl,-z -Wl,now -o .libs/qqwing main.o  ./.libs/libqqwing.so
 make[2]: Leaving directory '/build/reproducible-path/qqwing-1.3.4'
 make[1]: Leaving directory '/build/reproducible-path/qqwing-1.3.4'
@@ -444,14 +480,14 @@
 make[1]: Entering directory '/build/reproducible-path/qqwing-1.3.4'
 make[2]: Entering directory '/build/reproducible-path/qqwing-1.3.4'
  /usr/bin/mkdir -p '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu'
- /bin/bash ./libtool   --mode=install /usr/bin/install -c   libqqwing.la '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu'
+ /bin/sh ./libtool   --mode=install /usr/bin/install -c   libqqwing.la '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu'
 libtool: install: /usr/bin/install -c .libs/libqqwing.so.2.1.0 /build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu/libqqwing.so.2.1.0
 libtool: install: (cd /build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu && { ln -s -f libqqwing.so.2.1.0 libqqwing.so.2 || { rm -f libqqwing.so.2 && ln -s libqqwing.so.2.1.0 libqqwing.so.2; }; })
 libtool: install: (cd /build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu && { ln -s -f libqqwing.so.2.1.0 libqqwing.so || { rm -f libqqwing.so && ln -s libqqwing.so.2.1.0 libqqwing.so; }; })
 libtool: install: /usr/bin/install -c .libs/libqqwing.lai /build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu/libqqwing.la
 libtool: warning: remember to run 'libtool --finish /usr/lib/x86_64-linux-gnu'
  /usr/bin/mkdir -p '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/bin'
-  /bin/bash ./libtool   --mode=install /usr/bin/install -c qqwing '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/bin'
+  /bin/sh ./libtool   --mode=install /usr/bin/install -c qqwing '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/bin'
 libtool: warning: './libqqwing.la' has not been installed in '/usr/lib/x86_64-linux-gnu'
 libtool: install: /usr/bin/install -c .libs/qqwing /build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/bin/qqwing
  /usr/bin/mkdir -p '/build/reproducible-path/qqwing-1.3.4/debian/tmp/usr/lib/x86_64-linux-gnu/pkgconfig'
@@ -485,8 +521,8 @@
 dpkg-gencontrol: warning: Depends field of package libqqwing-dev: substitution variable ${shlibs:Depends} used, but is not defined
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'qqwing' in '../qqwing_1.3.4-3_amd64.deb'.
 dpkg-deb: building package 'qqwing-dbgsym' in '../qqwing-dbgsym_1.3.4-3_amd64.deb'.
+dpkg-deb: building package 'qqwing' in '../qqwing_1.3.4-3_amd64.deb'.
 dpkg-deb: building package 'libqqwing2v5' in '../libqqwing2v5_1.3.4-3_amd64.deb'.
 dpkg-deb: building package 'libqqwing2v5-dbgsym' in '../libqqwing2v5-dbgsym_1.3.4-3_amd64.deb'.
 dpkg-deb: building package 'libqqwing-dev' in '../libqqwing-dev_1.3.4-3_amd64.deb'.
@@ -497,12 +533,14 @@
 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/2073502/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2073502/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/3535271 and its subdirectories
-I: Current time: Sat Feb 28 12:00:32 -12 2026
-I: pbuilder-time-stamp: 1772323232
+I: removing directory /srv/workspace/pbuilder/2073502 and its subdirectories
+I: Current time: Mon Jan 27 07:38:29 +14 2025
+I: pbuilder-time-stamp: 1737913109