Diff of the two buildlogs:

--
--- b1/build.log	2024-04-18 01:22:27.015944073 +0000
+++ b2/build.log	2024-04-18 01:37:36.221169198 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Apr 17 13:12:27 -12 2024
-I: pbuilder-time-stamp: 1713402747
+I: Current time: Thu Apr 18 15:22:40 +14 2024
+I: pbuilder-time-stamp: 1713403360
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -32,52 +32,84 @@
 dpkg-source: info: applying correct-typo-for-dynamic-libs.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/29810/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/29700/tmp/hooks/D01_modify_environment starting
+debug: Running on cbxi4b.
+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 18 01:23 /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/29700/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/29700/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]="21" [3]="1" [4]="release" [5]="arm-unknown-linux-gnueabihf")
+  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=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='8e78a0c340804bf1bdf24ffe8ff61c28'
-  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='29810'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=2d15b9d74fa54e38a566be592519befc
+  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=29700
   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.pg047kun/pbuilderrc_vNuG --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.pg047kun/b1 --logfile b1/build.log jblas_1.2.5+dfsg-1.dsc'
-  SUDO_GID='114'
-  SUDO_UID='108'
-  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.pg047kun/pbuilderrc_n5Es --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.pg047kun/b2 --logfile b2/build.log jblas_1.2.5+dfsg-1.dsc'
+  SUDO_GID=116
+  SUDO_UID=112
+  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 virt64a 6.1.0-20-arm64 #1 SMP Debian 6.1.85-1 (2024-04-11) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-20-armmp #1 SMP Debian 6.1.85-1 (2024-04-11) armv7l GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Apr 17 07:43 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/29810/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Apr 14 07:46 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/29700/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -301,7 +333,7 @@
 Get: 170 http://deb.debian.org/debian unstable/main armhf libyaml-0-2 armhf 0.2.5-1 [46.8 kB]
 Get: 171 http://deb.debian.org/debian unstable/main armhf libruby3.1t64 armhf 3.1.2-8.3 [5068 kB]
 Get: 172 http://deb.debian.org/debian unstable/main armhf libruby armhf 1:3.1+nmu1 [4664 B]
-Fetched 209 MB in 19s (11.1 MB/s)
+Fetched 209 MB in 32s (6444 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (Reading database ... 
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
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(Reading database ... 45%
(Reading database ... 50%
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(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 ... 19442 files and directories currently installed.)
@@ -1203,7 +1235,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/jblas-1.2.5+dfsg/ && 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  > ../jblas_1.2.5+dfsg-1_source.changes
+I: user script /srv/workspace/pbuilder/29700/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/29700/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/jblas-1.2.5+dfsg/ && 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  > ../jblas_1.2.5+dfsg-1_source.changes
 dpkg-buildpackage: info: source package jblas
 dpkg-buildpackage: info: source version 1.2.5+dfsg-1
 dpkg-buildpackage: info: source distribution unstable
@@ -1240,7 +1276,7 @@
 clean-jars:
 
 BUILD SUCCESSFUL
-Total time: 2 seconds
+Total time: 11 seconds
 make[1]: Leaving directory '/build/reproducible-path/jblas-1.2.5+dfsg'
    dh_autoreconf_clean -O--buildsystem=ant
    dh_clean -O--buildsystem=ant
@@ -1286,7 +1322,7 @@
 export LOCPATH=/build/reproducible-path/jblas-1.2.5+dfsg/debian/tmp/locale/ && \
 	export LC_ALL=en_US.UTF-8 && \
 	/usr/bin/make
-make[2]: Entering directory '/build/reproducible-path/jblas-1.2.5+dfsg'
+make[2]: ingresso nella directory «/build/reproducible-path/jblas-1.2.5+dfsg»
 ruby scripts/fortranwrapper.rb --complexcc c99 org.jblas NativeBlas \
 ./lapack-lite-3.1.1/BLAS/SRC/[sdcz]copy.f \
 ./lapack-lite-3.1.1/BLAS/SRC/[sdcz]swap.f \
@@ -1329,7 +1365,7 @@
     [javac] Support for javac -h has been added in Java8, ignoring it
 
 BUILD SUCCESSFUL
-Total time: 11 seconds
+Total time: 49 seconds
 touch generated-sources
 gcc -g -fPIC -Iinclude -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux -c src/main/c/NativeBlas.c -o target/c/NativeBlas.o
 gcc -shared -L/usr/lib/arm-linux-gnueabihf -o target/c/NativeBlas.so target/c/NativeBlas.o -llapack -lblas
@@ -1338,7 +1374,7 @@
 gcc -shared -L/usr/lib/arm-linux-gnueabihf -o src/main/c/jblas_arch_flavor.so src/main/c/jblas_arch_flavor.o -llapack -lblas
 mv "src/main/c/jblas_arch_flavor.so" "src/main/resources/lib/dynamic/Linux/arm/libjblas_arch_flavor.so"
 rm src/main/c/jblas_arch_flavor.o
-make[2]: Leaving directory '/build/reproducible-path/jblas-1.2.5+dfsg'
+make[2]: uscita dalla directory «/build/reproducible-path/jblas-1.2.5+dfsg»
 # Build the jar files
 dh_auto_build -- minimal-jar
 	ant -Duser.name debian minimal-jar
@@ -1378,7 +1414,7 @@
       [jar] Building jar: /build/reproducible-path/jblas-1.2.5+dfsg/jblas-minimal-1.2.5.jar
 
 BUILD SUCCESSFUL
-Total time: 48 seconds
+Total time: 2 minutes 38 seconds
 make[1]: Leaving directory '/build/reproducible-path/jblas-1.2.5+dfsg'
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/jblas-1.2.5+dfsg'
@@ -1428,12 +1464,14 @@
 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/29700/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/29700/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/29810 and its subdirectories
-I: Current time: Wed Apr 17 13:22:22 -12 2024
-I: pbuilder-time-stamp: 1713403342
+I: removing directory /srv/workspace/pbuilder/29700 and its subdirectories
+I: Current time: Thu Apr 18 15:37:31 +14 2024
+I: pbuilder-time-stamp: 1713404251