Diff of the two buildlogs:

--
--- b1/build.log	2025-01-23 10:29:22.059783661 +0000
+++ b2/build.log	2025-01-23 10:34:13.326608113 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Wed Jan 22 22:26:59 -12 2025
-I: pbuilder-time-stamp: 1737628019
+I: Current time: Fri Jan 24 00:29:31 +14 2025
+I: pbuilder-time-stamp: 1737628171
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: applying increase-timeout.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/19579/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/6393/tmp/hooks/D01_modify_environment starting
+debug: Running on virt64b.
+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 23 10:29 /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/6393/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/6393/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='trixie'
-  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=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=arm
+  HOST_ARCH=armhf
   IFS=' 	
   '
-  INVOCATION_ID='c4ed3b4cf9fc4c36b45fb2cfa81cde72'
-  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='19579'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=4ee68145c71e4fdcac924c4fdf07a302
+  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=6393
   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.yG6rL8Od/pbuilderrc_M95R --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.yG6rL8Od/b1 --logfile b1/build.log node-promzard_0.3.0-2.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.yG6rL8Od/pbuilderrc_f0ev --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.yG6rL8Od/b2 --logfile b2/build.log node-promzard_0.3.0-2.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 ff4a 6.1.0-30-armmp-lpae #1 SMP Debian 6.1.124-1 (2025-01-12) armv7l GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-30-arm64 #1 SMP Debian 6.1.124-1 (2025-01-12) aarch64 GNU/Linux
 I: ls -l /bin
   lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/19579/tmp/hooks/D02_print_environment finished
+I: user script /srv/workspace/pbuilder/6393/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -412,7 +444,7 @@
 Get: 298 http://deb.debian.org/debian trixie/main armhf libjs-util all 0.12.5+~1.0.10-1 [16.0 kB]
 Get: 299 http://deb.debian.org/debian trixie/main armhf node-mute-stream all 0.0.8+~0.0.1-3 [6232 B]
 Get: 300 http://deb.debian.org/debian trixie/main armhf node-read all 1.0.7-5 [5388 B]
-Fetched 42.4 MB in 2s (18.5 MB/s)
+Fetched 42.4 MB in 11s (3971 kB/s)
 Preconfiguring packages ...
 Selecting previously unselected package netbase.
 (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 ... 19569 files and directories currently installed.)
@@ -1639,7 +1671,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/node-promzard-0.3.0/ && 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  > ../node-promzard_0.3.0-2_source.changes
+I: user script /srv/workspace/pbuilder/6393/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/6393/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/node-promzard-0.3.0/ && 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  > ../node-promzard_0.3.0-2_source.changes
 dpkg-buildpackage: info: source package node-promzard
 dpkg-buildpackage: info: source version 0.3.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -1664,9 +1700,10 @@
 	mkdir -p node_modules
 	ln -s ../. node_modules/promzard
 	/bin/sh -ex debian/tests/pkg-js/test
-+ ls test/basic.js test/buffer.js+  test/exports.jsgrep -v test/validate
- test/fn.js test/simple.js test/validate.js
-+ grep -v test/simple
+++ ls test/basic.js test/buffer.js test/exports.js test/fn.js test/simple.js test/validate.js
+++ grep -v test/simple
+++ grep -v test/validate
++ for i in `ls test/*.js|grep -v test/simple|grep -v test/validate`
 + tape test/basic.js
 TAP version 13
 # run the example
@@ -1722,6 +1759,7 @@
 # ok
 
 + sleep 1
++ for i in `ls test/*.js|grep -v test/simple|grep -v test/validate`
 + tape test/buffer.js
 TAP version 13
 # run the example using a buffer
@@ -1734,73 +1772,39 @@
 # ok
 
 + sleep 1
++ for i in `ls test/*.js|grep -v test/simple|grep -v test/validate`
 + tape test/exports.js
 TAP version 13
 # exports
-output="{\"a\":3,\"b\":\"!2b\",\"c\":{\"x\":\"55\",\"y\":\"/tmp/y/file.txt\"}}\n"
-ok 1 should be deeply equivalent
-
-1..1
-# tests 1
-# pass  1
-
-# ok
-
-+ sleep 1
-+ tape test/fn.js
-TAP version 13
-# prompt callback param
-output="{\"a\":3,\"b\":\"!2B...\",\"c\":{\"x\":5500,\"y\":\"/tmp/y/file.txt\"},\"a_function\":\"var fs = require('fs')\\n\\nmodule.exports = {\\n  \\\"a\\\": 1 + 2,\\n  \\\"b\\\": prompt('To be or not to be?', '!2b', function (s) {\\n    return s.toUpperCase() + '...'\\n  }),\\n  \\\"c\\\": {\\n    \\\"x\\\": prompt(function (x) { return x * 100 }),\\n    \\\"y\\\": tmpdir + \\\"/y/file.txt\\\"\\n  },\\n  a_function: function (cb) {\\n    fs.readFile(__filename, 'utf8', cb)\\n  },\\n  asyncPrompt: function (cb) {\\n    return cb(null, prompt('a prompt at any other time would smell as sweet'))\\n  }\\n}\\n\",\"asyncPrompt\":\"async prompt\"}\n"
-ok 1 should be deeply equivalent
+output=""
+undefined:1
 
-1..1
-# tests 1
-# pass  1
 
-# ok
-
-+ sleep 1
-Removing node_modules/promzard
-   create-stamp debian/debhelper-build-stamp
-   dh_prep
-   dh_auto_install --buildsystem=nodejs --destdir=debian/node-promzard/
-dh_auto_install: warning: ### Missing ./build/config.gypi, skipping
+SyntaxError: Unexpected end of JSON input
+    at JSON.parse (<anonymous>)
+    at ChildProcess.<anonymous> (/build/reproducible-path/node-promzard-0.3.0/test/exports.js:28:19)
+    at ChildProcess.emit (node:events:518:28)
+    at maybeClose (node:internal/child_process:1104:16)
+    at Socket.<anonymous> (node:internal/child_process:456:11)
+    at Socket.emit (node:events:518:28)
+    at Pipe.<anonymous> (node:net:344:12)
 
-No "files" field in ./package.json, install all files
-Files to install: ., !./build/config.gypi
-	mkdir -p /build/reproducible-path/node-promzard-0.3.0/debian/node-promzard//usr/share/nodejs/promzard/
-	install -m 644 ./promzard.js /build/reproducible-path/node-promzard-0.3.0/debian/node-promzard//usr/share/nodejs/promzard//
-	install -m 644 ./package.json /build/reproducible-path/node-promzard-0.3.0/debian/node-promzard//usr/share/nodejs/promzard//
-	install -m 644 ./package.json /build/reproducible-path/node-promzard-0.3.0/debian/node-promzard//usr/share/nodejs/promzard//
-Set ${nodejs:Version} to 20.18.1+dfsg
-   dh_installdocs
-   dh_installchangelogs
-   dh_perl
-   dh_link
-   dh_strip_nondeterminism
-   dh_compress
-   dh_fixperms
-   dh_missing
-   dh_installdeb
-   dh_nodejs_substvars
-   dh_gencontrol
-dpkg-gencontrol: warning: package node-promzard: substitution variable ${nodejs:Version} unused, but is defined
-   dh_md5sums
-   dh_builddeb
-dpkg-deb: building package 'node-promzard' in '../node-promzard_0.3.0-2_all.deb'.
- dpkg-genbuildinfo --build=binary -O../node-promzard_0.3.0-2_armhf.buildinfo
- dpkg-genchanges --build=binary -O../node-promzard_0.3.0-2_armhf.changes
-dpkg-genchanges: info: binary-only upload (no source code included)
- dpkg-source --after-build .
-dpkg-buildpackage: info: binary-only upload (no source included)
-dpkg-genchanges: info: not including original source code in upload
+Node.js v20.18.1
+dh_auto_test: error: /bin/sh -ex debian/tests/pkg-js/test returned exit code 1
+make: *** [debian/rules:8: binary] Error 25
+dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2
 I: copying local configuration
+E: Failed autobuilding of package
+I: user script /srv/workspace/pbuilder/6393/tmp/hooks/C01_cleanup starting
+debug output: disk usage on i-capture-the-hostname at Thu Jan 23 10:34:02 UTC 2025
+Filesystem      Size  Used Avail Use% Mounted on
+tmpfs           3.4G     0  3.4G   0% /dev/shm
+
+I: user script /srv/workspace/pbuilder/6393/tmp/hooks/C01_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/19579 and its subdirectories
-I: Current time: Wed Jan 22 22:29:18 -12 2025
-I: pbuilder-time-stamp: 1737628158
+I: removing directory /srv/workspace/pbuilder/6393 and its subdirectories