Diff of the two buildlogs:

--
--- b1/build.log	2024-10-17 09:33:06.433412213 +0000
+++ b2/build.log	2024-10-17 09:39:07.362024817 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Oct 16 21:22:43 -12 2024
-I: pbuilder-time-stamp: 1729156963
+I: Current time: Thu Oct 17 23:33:16 +14 2024
+I: pbuilder-time-stamp: 1729157596
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: unpacking haskell-data-inttrie_0.1.4-6.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/29822/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/25005/tmp/hooks/D01_modify_environment starting
+debug: Running on ff4a.
+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 Oct 17 09:33 /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/25005/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/25005/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=3 '
-  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]="32" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  BASH_VERSION='5.2.32(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='6491c86b5bfb4feea51d32cafd3e4f09'
-  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='29822'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=6de0a8399bd243d5b3b2a2073e87249c
+  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=25005
   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.sjPmXZF5/pbuilderrc_2SsO --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.sjPmXZF5/b1 --logfile b1/build.log haskell-data-inttrie_0.1.4-6.dsc'
-  SUDO_GID='113'
-  SUDO_UID='107'
-  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.sjPmXZF5/pbuilderrc_ykJe --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.sjPmXZF5/b2 --logfile b2/build.log haskell-data-inttrie_0.1.4-6.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 virt64c 6.1.0-26-arm64 #1 SMP Debian 6.1.112-1 (2024-09-30) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-26-armmp-lpae #1 SMP Debian 6.1.112-1 (2024-09-30) armv7l GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Aug  4 21:30 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/29822/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/25005/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -84,7 +116,7 @@
 Depends: debhelper (>= 10), haskell-devscripts (>= 0.13), cdbs, ghc (>= 9.6), ghc-prof, ghc-doc
 dpkg-deb: building package 'pbuilder-satisfydepends-dummy' in '/tmp/satisfydepends-aptitude/pbuilder-satisfydepends-dummy.deb'.
 Selecting previously unselected package pbuilder-satisfydepends-dummy.
-(Reading database ... 19665 files and directories currently installed.)
+(Reading database ... 21597 files and directories currently installed.)
 Preparing to unpack .../pbuilder-satisfydepends-dummy.deb ...
 Unpacking pbuilder-satisfydepends-dummy (0.invalid.0) ...
 dpkg: pbuilder-satisfydepends-dummy: dependency problems, but configuring anyway as you requested:
@@ -230,10 +262,10 @@
 Get: 111 http://deb.debian.org/debian unstable/main armhf haskell-devscripts-minimal all 0.16.33 [53.0 kB]
 Get: 112 http://deb.debian.org/debian unstable/main armhf hscolour armhf 1.25-1 [1953 kB]
 Get: 113 http://deb.debian.org/debian unstable/main armhf haskell-devscripts all 0.16.33 [6156 B]
-Fetched 300 MB in 17s (17.8 MB/s)
+Fetched 300 MB in 16s (18.9 MB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libedit2:armhf.
-(Reading database ... 
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+(Reading database ... 
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(Reading database ... 21597 files and directories currently installed.)
 Preparing to unpack .../00-libedit2_3.1-20240808-1_armhf.deb ...
 Unpacking libedit2:armhf (3.1-20240808-1) ...
 Selecting previously unselected package libicu72:armhf.
@@ -357,7 +389,7 @@
 Setting up libexpat1:armhf (2.6.3-1) ...
 Setting up python3.12-minimal (3.12.7-1) ...
 Selecting previously unselected package python3-minimal.
-(Reading database ... 
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(Reading database ... 34668 files and directories currently installed.)
+(Reading database ... 
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(Reading database ... 36600 files and directories currently installed.)
 Preparing to unpack .../00-python3-minimal_3.12.6-1_armhf.deb ...
 Unpacking python3-minimal (3.12.6-1) ...
 Selecting previously unselected package media-types.
@@ -401,7 +433,7 @@
 Unpacking libpython3-stdlib:armhf (3.12.6-1) ...
 Setting up python3-minimal (3.12.6-1) ...
 Selecting previously unselected package python3.
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(Reading database ... 35686 files and directories currently installed.)
+(Reading database ... 
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(Reading database ... 37618 files and directories currently installed.)
 Preparing to unpack .../00-python3_3.12.6-1_armhf.deb ...
 Unpacking python3 (3.12.6-1) ...
 Selecting previously unselected package sensible-utils.
@@ -615,8 +647,8 @@
 Setting up tzdata (2024b-3) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Thu Oct 17 09:26:07 UTC 2024.
-Universal Time is now:  Thu Oct 17 09:26:07 UTC 2024.
+Local time is now:      Thu Oct 17 09:36:23 UTC 2024.
+Universal Time is now:  Thu Oct 17 09:36:23 UTC 2024.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up autotools-dev (20220109.1) ...
@@ -714,7 +746,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/haskell-data-inttrie-0.1.4/ && 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  > ../haskell-data-inttrie_0.1.4-6_source.changes
+I: user script /srv/workspace/pbuilder/25005/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/25005/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/haskell-data-inttrie-0.1.4/ && 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  > ../haskell-data-inttrie_0.1.4-6_source.changes
 dpkg-buildpackage: info: source package haskell-data-inttrie
 dpkg-buildpackage: info: source version 0.1.4-6
 dpkg-buildpackage: info: source distribution unstable
@@ -755,7 +791,7 @@
 [2 of 2] Linking debian/hlibrary.setup
 perl -d:Confess -MDebian::Debhelper::Buildsystem::Haskell::Recipes=/.*/ \
 	-E 'configure_recipe'
-Running find . ! -newer /tmp/F2wvtozx9a -exec touch -d 1998-01-01 UTC {} ;
+Running find . ! -newer /tmp/qw0_shsbX7 -exec touch -d 1998-01-01 UTC {} ;
 Running dh_listpackages
 libghc-data-inttrie-dev
 libghc-data-inttrie-prof
@@ -900,7 +936,7 @@
 creating dist-ghc/doc
 creating dist-ghc/doc/html
 creating dist-ghc/doc/html/data-inttrie
-Running: /usr/bin/haddock '@dist-ghc/doc/html/data-inttrie/haddock-response8522-1.txt' '--mathjax=file:///usr/share/javascript/mathjax/MathJax.js'
+Running: /usr/bin/haddock '@dist-ghc/doc/html/data-inttrie/haddock-response27559-1.txt' '--mathjax=file:///usr/share/javascript/mathjax/MathJax.js'
  100% ( 10 / 10) in 'Data.IntTrie'
 Documentation created: dist-ghc/doc/html/data-inttrie/,
 dist-ghc/doc/html/data-inttrie/data-inttrie.txt
@@ -1190,10 +1226,10 @@
 dh_installdeb -plibghc-data-inttrie-dev 
 dh_perl -plibghc-data-inttrie-dev 
 dh_shlibdeps -plibghc-data-inttrie-dev -- --ignore-missing-info
-dpkg-shlibdeps: warning: debian/libghc-data-inttrie-dev/usr/lib/haskell-packages/ghc/lib/arm-linux-ghc-9.6.6/libHSdata-inttrie-0.1.4-9KOlfoKOUKQFSHo9nFaLQ0-ghc9.6.6.so contains an unresolvable reference to symbol stg_INTLIKE_closure: it's probably a plugin
+dpkg-shlibdeps: warning: debian/libghc-data-inttrie-dev/usr/lib/haskell-packages/ghc/lib/arm-linux-ghc-9.6.6/libHSdata-inttrie-0.1.4-9KOlfoKOUKQFSHo9nFaLQ0-ghc9.6.6.so contains an unresolvable reference to symbol stg_bh_upd_frame_info: it's probably a plugin
 dpkg-shlibdeps: warning: 17 other similar warnings have been skipped (use -v to see them all)
-dpkg-shlibdeps: warning: package could avoid a useless dependency if debian/libghc-data-inttrie-dev/usr/lib/haskell-packages/ghc/lib/arm-linux-ghc-9.6.6/libHSdata-inttrie-0.1.4-9KOlfoKOUKQFSHo9nFaLQ0-ghc9.6.6.so was not linked against libm.so.6 (it uses none of the library's symbols)
 dpkg-shlibdeps: warning: package could avoid a useless dependency if debian/libghc-data-inttrie-dev/usr/lib/haskell-packages/ghc/lib/arm-linux-ghc-9.6.6/libHSdata-inttrie-0.1.4-9KOlfoKOUKQFSHo9nFaLQ0-ghc9.6.6.so was not linked against libgmp.so.10 (it uses none of the library's symbols)
+dpkg-shlibdeps: warning: package could avoid a useless dependency if debian/libghc-data-inttrie-dev/usr/lib/haskell-packages/ghc/lib/arm-linux-ghc-9.6.6/libHSdata-inttrie-0.1.4-9KOlfoKOUKQFSHo9nFaLQ0-ghc9.6.6.so was not linked against libm.so.6 (it uses none of the library's symbols)
 dh_installdeb -plibghc-data-inttrie-prof 
 dh_perl -plibghc-data-inttrie-prof 
 dh_shlibdeps -plibghc-data-inttrie-prof -- --ignore-missing-info
@@ -1226,12 +1262,14 @@
 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/25005/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/25005/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/29822 and its subdirectories
-I: Current time: Wed Oct 16 21:33:02 -12 2024
-I: pbuilder-time-stamp: 1729157582
+I: removing directory /srv/workspace/pbuilder/25005 and its subdirectories
+I: Current time: Thu Oct 17 23:39:02 +14 2024
+I: pbuilder-time-stamp: 1729157942