Diff of the two buildlogs:

--
--- b1/build.log	2020-03-11 07:46:34.529360347 +0000
+++ b2/build.log	2020-03-11 07:47:00.104868948 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue Mar 10 19:38:54 -12 2020
-I: pbuilder-time-stamp: 1583912334
+I: Current time: Wed Apr 14 04:09:34 +14 2021
+I: pbuilder-time-stamp: 1618322974
 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 Nov 19 07:59:47 2018 -12
+gpgv: Signature made Tue Nov 20 09:59:47 2018 +14
 gpgv:                using RSA key 58B66D48736BE93B052DE6729C5C99EB05BD750A
 gpgv: Can't check signature: No public key
 dpkg-source: warning: failed to verify signature on ./libjs-jquery-jstree_3.3.7+dfsg1-1.dsc
@@ -29,6 +29,18 @@
 dpkg-source: info: applying fix-links-in-basic-example.patch
 I: Not using root during the build.
 I: Installing the build-deps
+I: user script /srv/workspace/pbuilder/40035/tmp/hooks/D01_modify_environment starting
+disorder-fs debug: Running on profitbricks-build16-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/40035/tmp/hooks/D01_modify_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -156,7 +168,7 @@
 Get: 84 http://deb.debian.org/debian buster/main i386 node-yargs-parser all 11.1.1-1 [16.5 kB]
 Get: 85 http://deb.debian.org/debian buster/main i386 node-yargs all 10.0.3-2 [57.1 kB]
 Get: 86 http://deb.debian.org/debian buster/main i386 node-uglify all 2.8.29-6 [118 kB]
-Fetched 27.5 MB in 24s (1153 kB/s)
+Fetched 27.5 MB in 0s (73.1 MB/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.)
@@ -519,7 +531,7 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/libjs-jquery-jstree-3.3.7+dfsg1/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b
+I: Running cd /build/libjs-jquery-jstree-3.3.7+dfsg1/ && 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 libjs-jquery-jstree
 dpkg-buildpackage: info: source version 3.3.7+dfsg1-1
 dpkg-buildpackage: info: source distribution unstable
@@ -616,12 +628,14 @@
  dpkg-source --after-build .
 dpkg-buildpackage: info: binary-only upload (no source included)
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/40035/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/40035/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/7657 and its subdirectories
-I: Current time: Tue Mar 10 19:46:34 -12 2020
-I: pbuilder-time-stamp: 1583912794
+I: removing directory /srv/workspace/pbuilder/40035 and its subdirectories
+I: Current time: Wed Apr 14 04:09:58 +14 2021
+I: pbuilder-time-stamp: 1618322998