Diff of the two buildlogs:

--
--- b1/build.log	2025-03-29 12:37:01.922278559 +0000
+++ b2/build.log	2025-03-29 12:38:33.894124363 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Mar 29 00:34:36 -12 2025
-I: pbuilder-time-stamp: 1743251676
+I: Current time: Sun Mar 30 02:37:11 +14 2025
+I: pbuilder-time-stamp: 1743251831
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -22,52 +22,84 @@
 dpkg-source: info: unpacking largetifftools_1.4.2-1.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/22337/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/22406/tmp/hooks/D01_modify_environment starting
+debug: Running on virt32a.
+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 Mar 29 12:37 /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/22406/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/22406/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='armhf'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=5 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='armhf'
+  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]="arm-unknown-linux-gnueabihf")
+  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=armhf
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=4 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='4c02719448954c43aa2ca62e3a4e5203'
-  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='22337'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=2942fb6d69b840708efa347cf4e4663c
+  LANG=C
+  LANGUAGE=it_CH:it
+  LC_ALL=C
+  MACHTYPE=arm-unknown-linux-gnueabihf
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnueabihf
+  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=22406
   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.vsRZitjY/pbuilderrc_v1iM --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.vsRZitjY/b1 --logfile b1/build.log largetifftools_1.4.2-1.dsc'
-  SUDO_GID='114'
-  SUDO_UID='109'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://10.0.0.15:3142/'
+  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.vsRZitjY/pbuilderrc_aDeI --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.vsRZitjY/b2 --logfile b2/build.log largetifftools_1.4.2-1.dsc'
+  SUDO_GID=113
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://10.0.0.15:3142/
 I: uname -a
-  Linux ff64a 6.1.0-32-arm64 #1 SMP Debian 6.1.129-1 (2025-03-06) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-32-armmp-lpae #1 SMP Debian 6.1.129-1 (2025-03-06) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Mar  4 11:20 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/22337/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/22406/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -164,7 +196,7 @@
 Get: 51 http://deb.debian.org/debian unstable/main armhf libtiff6 armhf 4.7.0-2 [321 kB]
 Get: 52 http://deb.debian.org/debian unstable/main armhf libtiffxx6 armhf 4.7.0-2 [164 kB]
 Get: 53 http://deb.debian.org/debian unstable/main armhf libtiff-dev armhf 4.7.0-2 [462 kB]
-Fetched 16.1 MB in 1s (28.8 MB/s)
+Fetched 16.1 MB in 0s (42.6 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 ... 19530 files and directories currently installed.)
@@ -391,7 +423,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/largetifftools-1.4.2/ && 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  > ../largetifftools_1.4.2-1_source.changes
+I: user script /srv/workspace/pbuilder/22406/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/22406/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/largetifftools-1.4.2/ && 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  > ../largetifftools_1.4.2-1_source.changes
 dpkg-buildpackage: info: source package largetifftools
 dpkg-buildpackage: info: source version 1.4.2-1
 dpkg-buildpackage: info: source distribution unstable
@@ -490,7 +526,7 @@
 
 make[1]: Leaving directory '/build/reproducible-path/largetifftools-1.4.2'
    dh_auto_build
-	make -j5
+	make -j4
 make[1]: Entering directory '/build/reproducible-path/largetifftools-1.4.2'
 make  all-recursive
 make[2]: Entering directory '/build/reproducible-path/largetifftools-1.4.2'
@@ -499,6 +535,10 @@
 gcc -DHAVE_CONFIG_H -I. -I..   -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/largetifftools-1.4.2=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -fopenmp -c -o tiffsplittiles.o tiffsplittiles.c
 gcc -DHAVE_CONFIG_H -I. -I..   -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/largetifftools-1.4.2=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -fopenmp -c -o tiffmakemosaic.o tiffmakemosaic.c
 gcc -DHAVE_CONFIG_H -I. -I..   -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/largetifftools-1.4.2=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -fopenmp -c -o tifffastcrop.o tifffastcrop.c
+tiffmakemosaic.c: In function 'main':
+tiffmakemosaic.c:1576:32: warning: unused variable 'arglength' [-Wunused-variable]
+ 1576 |                         size_t arglength;
+      |                                ^~~~~~~~~
 tifffastcrop.c: In function 'computeMemorySize':
 tifffastcrop.c:718:21: warning: unused variable 'pixelsperbyte' [-Wunused-variable]
   718 |                 int pixelsperbyte = 8/bitsperpixel;
@@ -507,10 +547,6 @@
 tifffastcrop.c:1098:26: warning: unused variable 'bitsperpixel' [-Wunused-variable]
  1098 |                 uint16_t bitsperpixel = bitspersample * spp;
       |                          ^~~~~~~~~~~~
-tiffmakemosaic.c: In function 'main':
-tiffmakemosaic.c:1576:32: warning: unused variable 'arglength' [-Wunused-variable]
- 1576 |                         size_t arglength;
-      |                                ^~~~~~~~~
 gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/largetifftools-1.4.2=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -fopenmp  -Wl,-z,relro -Wl,-z,now -o tiffsplittiles tiffsplittiles.o  -ltiff -lwebp -lzstd -lpng -ljpeg -lm 
 gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/largetifftools-1.4.2=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -fopenmp  -Wl,-z,relro -Wl,-z,now -o tifffastcrop tifffastcrop.o  -ltiff -lwebp -lzstd -lpng -ljpeg -lm 
 gcc  -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/largetifftools-1.4.2=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -fopenmp  -Wl,-z,relro -Wl,-z,now -o tiffmakemosaic tiffmakemosaic.o  -ltiff -lwebp -lzstd -lpng -ljpeg -lm 
@@ -532,7 +568,7 @@
 make[2]: Leaving directory '/build/reproducible-path/largetifftools-1.4.2'
 make[1]: Leaving directory '/build/reproducible-path/largetifftools-1.4.2'
    dh_auto_test
-	make -j5 check "TESTSUITEFLAGS=-j5 --verbose" VERBOSE=1
+	make -j4 check "TESTSUITEFLAGS=-j4 --verbose" VERBOSE=1
 make[1]: Entering directory '/build/reproducible-path/largetifftools-1.4.2'
 Making check in src
 make[2]: Entering directory '/build/reproducible-path/largetifftools-1.4.2/src'
@@ -556,13 +592,13 @@
    create-stamp debian/debhelper-build-stamp
    dh_prep
    dh_auto_install --destdir=debian/largetifftools/
-	make -j5 install DESTDIR=/build/reproducible-path/largetifftools-1.4.2/debian/largetifftools AM_UPDATE_INFO_DIR=no
+	make -j4 install DESTDIR=/build/reproducible-path/largetifftools-1.4.2/debian/largetifftools AM_UPDATE_INFO_DIR=no
 make[1]: Entering directory '/build/reproducible-path/largetifftools-1.4.2'
 Making install in src
 make[2]: Entering directory '/build/reproducible-path/largetifftools-1.4.2/src'
 make[3]: Entering directory '/build/reproducible-path/largetifftools-1.4.2/src'
-make[3]: Nothing to be done for 'install-data-am'.
  /usr/bin/mkdir -p '/build/reproducible-path/largetifftools-1.4.2/debian/largetifftools/usr/bin'
+make[3]: Nothing to be done for 'install-data-am'.
   /usr/bin/install -c tiffsplittiles tiffmakemosaic tifffastcrop '/build/reproducible-path/largetifftools-1.4.2/debian/largetifftools/usr/bin'
 make[3]: Leaving directory '/build/reproducible-path/largetifftools-1.4.2/src'
 make[2]: Leaving directory '/build/reproducible-path/largetifftools-1.4.2/src'
@@ -625,12 +661,14 @@
 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/22406/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/22406/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/22337 and its subdirectories
-I: Current time: Sat Mar 29 00:36:57 -12 2025
-I: pbuilder-time-stamp: 1743251817
+I: removing directory /srv/workspace/pbuilder/22406 and its subdirectories
+I: Current time: Sun Mar 30 02:38:30 +14 2025
+I: pbuilder-time-stamp: 1743251910