Diff of the two buildlogs:

--
--- b1/build.log	2020-03-24 12:47:14.613618676 +0000
+++ b2/build.log	2020-03-24 12:51:30.536498574 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Apr 26 07:09:58 -12 2021
-I: pbuilder-time-stamp: 1619464198
+I: Current time: Wed Mar 25 02:47:16 +14 2020
+I: pbuilder-time-stamp: 1585054036
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/buster-reproducible-base.tgz]
 I: copying local configuration
@@ -17,7 +17,7 @@
 I: Extracting source
 gpgv: unknown type of key resource 'trustedkeys.kbx'
 gpgv: keyblock resource '/root/.gnupg/trustedkeys.kbx': General error
-gpgv: Signature made Sun Nov 11 04:17:48 2018 -12
+gpgv: Signature made Mon Nov 12 06:17:48 2018 +14
 gpgv:                using RSA key F1FF5D0D7E002DF0FE55FB0CA65B78DBE67C7AAC
 gpgv: Can't check signature: No public key
 dpkg-source: warning: failed to verify signature on ./rcconf_3.2+nmu1.dsc
@@ -25,6 +25,18 @@
 dpkg-source: info: unpacking rcconf_3.2+nmu1.tar.gz
 I: Not using root during the build.
 I: Installing the build-deps
+I: user script /srv/workspace/pbuilder/3624/tmp/hooks/D01_modify_environment starting
+disorder-fs debug: Running on profitbricks-build12-i386.
+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
+Removing 'diversion of /bin/sh to /bin/sh.distrib by dash'
+Adding 'diversion of /bin/sh to /bin/sh.distrib by bash'
+Removing 'diversion of /usr/share/man/man1/sh.1.gz to /usr/share/man/man1/sh.distrib.1.gz by dash'
+Adding 'diversion of /usr/share/man/man1/sh.1.gz to /usr/share/man/man1/sh.distrib.1.gz by 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/3624/tmp/hooks/D01_modify_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -93,7 +105,7 @@
 Get: 31 http://deb.debian.org/debian buster/main i386 intltool-debian all 0.35.0+20060710.5 [26.8 kB]
 Get: 32 http://deb.debian.org/debian buster/main i386 po-debconf all 1.0.21 [248 kB]
 Get: 33 http://deb.debian.org/debian buster/main i386 debhelper all 12.1.1 [1016 kB]
-Fetched 19.4 MB in 0s (71.3 MB/s)
+Fetched 19.4 MB in 6s (3246 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libbsd0:i386.
 (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 ... 19231 files and directories currently installed.)
@@ -243,7 +255,7 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/rcconf-3.2+nmu1/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b
+I: Running cd /build/rcconf-3.2+nmu1/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b
 dpkg-buildpackage: info: source package rcconf
 dpkg-buildpackage: info: source version 3.2+nmu1
 dpkg-buildpackage: info: source distribution unstable
@@ -306,12 +318,14 @@
  dpkg-source --after-build .
 dpkg-buildpackage: info: binary-only upload (no source included)
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/3624/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/3624/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/28178 and its subdirectories
-I: Current time: Mon Apr 26 07:10:12 -12 2021
-I: pbuilder-time-stamp: 1619464212
+I: removing directory /srv/workspace/pbuilder/3624 and its subdirectories
+I: Current time: Wed Mar 25 02:51:30 +14 2020
+I: pbuilder-time-stamp: 1585054290