Diff of the two buildlogs:

--
--- b1/build.log	2020-02-24 22:06:46.776540865 +0000
+++ b2/build.log	2020-02-24 22:07:18.635933802 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Feb 24 10:02:26 -12 2020
-I: pbuilder-time-stamp: 1582581746
+I: Current time: Mon Mar 29 18:29:48 +14 2021
+I: pbuilder-time-stamp: 1616992188
 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 Fri Aug 17 00:14:08 2018 -12
+gpgv: Signature made Sat Aug 18 02:14:08 2018 +14
 gpgv:                using RSA key 50BC7CF939D20C272A6B065652B6BBD953968D1B
 gpgv: Can't check signature: No public key
 dpkg-source: warning: failed to verify signature on ./golang-github-coreos-go-systemd_17-2.dsc
@@ -27,6 +27,18 @@
 dpkg-source: info: unpacking golang-github-coreos-go-systemd_17-2.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
+I: user script /srv/workspace/pbuilder/55787/tmp/hooks/D01_modify_environment starting
+disorder-fs debug: Running on profitbricks-build6-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/55787/tmp/hooks/D01_modify_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -130,7 +142,7 @@
 Get: 54 http://deb.debian.org/debian buster/main i386 libsystemd-dev i386 241-7~deb10u3 [321 kB]
 Get: 55 http://deb.debian.org/debian buster/main i386 pkg-config i386 0.29-6 [64.7 kB]
 Get: 56 http://deb.debian.org/debian buster/main i386 golang-github-coreos-go-systemd-dev all 17-2 [46.7 kB]
-Fetched 81.9 MB in 16s (5278 kB/s)
+Fetched 81.9 MB in 1s (83.4 MB/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.)
@@ -377,7 +389,7 @@
 fakeroot is already the newest version (1.23-1).
 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
 I: Building the package
-I: Running cd /build/golang-github-coreos-go-systemd-17/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b
+I: Running cd /build/golang-github-coreos-go-systemd-17/ && 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 golang-github-coreos-go-systemd
 dpkg-buildpackage: info: source version 17-2
 dpkg-buildpackage: info: source distribution unstable
@@ -397,85 +409,85 @@
 dh_auto_configure: "github.com/coreos/go-systemd" is already installed. Please check for circular dependencies.
 
    dh_auto_build -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go install -gcflags=all=\"-trimpath=/build/golang-github-coreos-go-systemd-17/obj-i686-linux-gnu/src\" -asmflags=all=\"-trimpath=/build/golang-github-coreos-go-systemd-17/obj-i686-linux-gnu/src\" -v -p 10 github.com/coreos/go-systemd/activation github.com/coreos/go-systemd/daemon github.com/coreos/go-systemd/dbus github.com/coreos/go-systemd/journal github.com/coreos/go-systemd/login1 github.com/coreos/go-systemd/machine1 github.com/coreos/go-systemd/sdjournal github.com/coreos/go-systemd/unit github.com/coreos/go-systemd/util
+	cd obj-i686-linux-gnu && go install -gcflags=all=\"-trimpath=/build/golang-github-coreos-go-systemd-17/obj-i686-linux-gnu/src\" -asmflags=all=\"-trimpath=/build/golang-github-coreos-go-systemd-17/obj-i686-linux-gnu/src\" -v -p 18 github.com/coreos/go-systemd/activation github.com/coreos/go-systemd/daemon github.com/coreos/go-systemd/dbus github.com/coreos/go-systemd/journal github.com/coreos/go-systemd/login1 github.com/coreos/go-systemd/machine1 github.com/coreos/go-systemd/sdjournal github.com/coreos/go-systemd/unit github.com/coreos/go-systemd/util
 errors
-unicode/utf8
 internal/race
-internal/cpu
+unicode/utf8
 container/list
-runtime/internal/atomic
-sync/atomic
+crypto/subtle
 math/bits
-runtime/internal/sys
-unicode
 crypto/internal/subtle
-crypto/subtle
 vendor/golang_org/x/crypto/cryptobyte/asn1
-math
-internal/testlog
+runtime/internal/atomic
+internal/cpu
+unicode
 vendor/golang_org/x/net/dns/dnsmessage
 internal/nettrace
+runtime/internal/sys
 runtime/cgo
+sync/atomic
+math
+internal/testlog
 internal/bytealg
 runtime
 strconv
 crypto/rc4
 sync
-io
 internal/singleflight
+io
 math/rand
-syscall
 reflect
-crypto/cipher
-crypto/internal/randutil
-strings
+syscall
 hash
 bytes
+crypto/internal/randutil
+crypto/cipher
+strings
 crypto
 crypto/hmac
-crypto/sha512
+crypto/md5
 crypto/sha1
+crypto/sha512
 crypto/sha256
-crypto/md5
 crypto/aes
 bufio
 path
-sort
-encoding/binary
-time
 internal/syscall/unix
-crypto/des
+time
+internal/poll
+encoding/binary
+sort
+os
 encoding/base64
-vendor/golang_org/x/crypto/internal/chacha20
 vendor/golang_org/x/crypto/poly1305
 vendor/golang_org/x/crypto/curve25519
+crypto/des
+vendor/golang_org/x/crypto/internal/chacha20
 vendor/golang_org/x/crypto/chacha20poly1305
 encoding/pem
-internal/poll
-os
 path/filepath
 fmt
 io/ioutil
-context
 encoding/hex
-github.com/coreos/go-systemd/unit
-github.com/coreos/pkg/dlopen
+context
 net/url
 os/user
 log
+github.com/coreos/pkg/dlopen
+github.com/coreos/go-systemd/unit
 math/big
 os/exec
 net
 github.com/coreos/go-systemd/util
 github.com/coreos/go-systemd/sdjournal
-crypto/rand
 crypto/dsa
-encoding/asn1
+crypto/rand
 crypto/elliptic
+encoding/asn1
 crypto/rsa
+crypto/x509/pkix
 vendor/golang_org/x/crypto/cryptobyte
 crypto/ecdsa
-crypto/x509/pkix
 github.com/coreos/go-systemd/daemon
 github.com/coreos/go-systemd/journal
 crypto/x509
@@ -521,12 +533,14 @@
  dpkg-source --after-build .
 dpkg-buildpackage: info: binary-only upload (no source included)
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/55787/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/55787/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/4017 and its subdirectories
-I: Current time: Mon Feb 24 10:06:46 -12 2020
-I: pbuilder-time-stamp: 1582582006
+I: removing directory /srv/workspace/pbuilder/55787 and its subdirectories
+I: Current time: Mon Mar 29 18:30:18 +14 2021
+I: pbuilder-time-stamp: 1616992218