Diff of the two buildlogs:

--
--- b1/build.log	2020-02-25 01:02:29.411336312 +0000
+++ b2/build.log	2020-02-25 01:06:40.762555906 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Mar 28 19:25:13 -12 2021
-I: pbuilder-time-stamp: 1617002713
+I: Current time: Tue Feb 25 15:02:31 +14 2020
+I: pbuilder-time-stamp: 1582592551
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/buster-reproducible-base.tgz]
 I: copying local configuration
@@ -18,7 +18,7 @@
 I: Extracting source
 gpgv: unknown type of key resource 'trustedkeys.kbx'
 gpgv: keyblock resource '/root/.gnupg/trustedkeys.kbx': General error
-gpgv: Signature made Mon Feb 19 07:07:28 2018 -12
+gpgv: Signature made Tue Feb 20 09:07:28 2018 +14
 gpgv:                using RSA key B3131A451DBFDF7CA05B4197054BBB9F7D806442
 gpgv: Can't check signature: No public key
 dpkg-source: warning: failed to verify signature on ./rhinote_0.7.4-3.dsc
@@ -35,6 +35,18 @@
 dpkg-source: info: applying U07-set-class-name.diff
 I: Not using root during the build.
 I: Installing the build-deps
+I: user script /srv/workspace/pbuilder/6312/tmp/hooks/D01_modify_environment starting
+disorder-fs debug: Running on profitbricks-build2-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/6312/tmp/hooks/D01_modify_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -112,7 +124,7 @@
 Get: 36 http://deb.debian.org/debian buster/main i386 libyaml-0-2 i386 0.2.1-1 [49.7 kB]
 Get: 37 http://deb.debian.org/debian buster/main i386 pandoc-data all 2.2.1-3 [329 kB]
 Get: 38 http://deb.debian.org/debian buster/main i386 pandoc i386 2.2.1-3+b2 [15.0 MB]
-Fetched 34.8 MB in 0s (92.8 MB/s)
+Fetched 34.8 MB in 6s (6161 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libbsd0:i386.
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(Reading database ... 19231 files and directories currently installed.)
@@ -282,7 +294,7 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/rhinote-0.7.4/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b
+I: Running cd /build/rhinote-0.7.4/ && 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 rhinote
 dpkg-buildpackage: info: source version 0.7.4-3
 dpkg-buildpackage: info: source distribution unstable
@@ -319,12 +331,14 @@
  dpkg-source --after-build .
 dpkg-buildpackage: info: binary-only upload (no source included)
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/6312/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/6312/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/34919 and its subdirectories
-I: Current time: Sun Mar 28 19:25:28 -12 2021
-I: pbuilder-time-stamp: 1617002728
+I: removing directory /srv/workspace/pbuilder/6312 and its subdirectories
+I: Current time: Tue Feb 25 15:06:40 +14 2020
+I: pbuilder-time-stamp: 1582592800