Diff of the two buildlogs:

--
--- b1/build.log	2019-12-29 07:43:28.449553862 +0000
+++ b2/build.log	2019-12-29 07:49:04.898714872 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sat Jan 30 02:05:57 -12 2021
-I: pbuilder-time-stamp: 1612015557
+I: Current time: Sun Dec 29 21:43:30 +14 2019
+I: pbuilder-time-stamp: 1577605410
 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 Jul 17 06:16:34 2017 -12
+gpgv: Signature made Tue Jul 18 08:16:34 2017 +14
 gpgv:                using RSA key 142421B19AD4A95996F95072EA2500B412C59ACF
 gpgv: Can't check signature: No public key
 dpkg-source: warning: failed to verify signature on ./golang-etcd_2.0.0-4.dsc
@@ -27,6 +27,18 @@
 dpkg-source: info: unpacking golang-etcd_2.0.0-4.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
+I: user script /srv/workspace/pbuilder/1698/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/1698/tmp/hooks/D01_modify_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -105,7 +117,7 @@
 Get: 37 http://deb.debian.org/debian buster/main i386 golang-src i386 2:1.11~1 [4348 B]
 Get: 38 http://deb.debian.org/debian buster/main i386 golang-go i386 2:1.11~1 [23.4 kB]
 Get: 39 http://deb.debian.org/debian buster/main i386 golang-any i386 2:1.11~1 [4472 B]
-Fetched 74.2 MB in 1s (94.0 MB/s)
+Fetched 74.2 MB in 19s (3899 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.)
@@ -284,7 +296,7 @@
 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-etcd-2.0.0/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b
+I: Running cd /build/golang-etcd-2.0.0/ && 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-etcd
 dpkg-buildpackage: info: source version 2.0.0-4
 dpkg-buildpackage: info: source distribution unstable
@@ -302,28 +314,28 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go install -gcflags=all=\"-trimpath=/build/golang-etcd-2.0.0/obj-i686-linux-gnu/src\" -asmflags=all=\"-trimpath=/build/golang-etcd-2.0.0/obj-i686-linux-gnu/src\" -v -p 18 github.com/coreos/go-etcd/etcd
-internal/race
+	cd obj-i686-linux-gnu && go install -gcflags=all=\"-trimpath=/build/golang-etcd-2.0.0/obj-i686-linux-gnu/src\" -asmflags=all=\"-trimpath=/build/golang-etcd-2.0.0/obj-i686-linux-gnu/src\" -v -p 10 github.com/coreos/go-etcd/etcd
 unicode/utf8
-encoding
-vendor/golang_org/x/crypto/cryptobyte/asn1
-unicode
-unicode/utf16
-container/list
 errors
-math/bits
-internal/nettrace
-runtime/internal/atomic
-internal/cpu
+internal/race
+container/list
+unicode
 sync/atomic
-crypto/subtle
-crypto/internal/subtle
+internal/cpu
+runtime/internal/atomic
+math/bits
 runtime/internal/sys
-runtime/cgo
-vendor/golang_org/x/net/dns/dnsmessage
-math
+crypto/internal/subtle
+crypto/subtle
 internal/testlog
+math
+vendor/golang_org/x/crypto/cryptobyte/asn1
+vendor/golang_org/x/net/dns/dnsmessage
+internal/nettrace
+encoding
+unicode/utf16
 internal/bytealg
+runtime/cgo
 runtime
 strconv
 crypto/rc4
@@ -335,61 +347,61 @@
 syscall
 hash
 crypto/internal/randutil
-bytes
 crypto/cipher
+bytes
 strings
-crypto/hmac
 crypto
+crypto/hmac
 hash/crc32
 crypto/sha512
-crypto/md5
-crypto/sha256
 crypto/sha1
+crypto/sha256
+crypto/md5
 crypto/aes
 vendor/golang_org/x/text/transform
 bufio
 path
-internal/syscall/unix
 time
+internal/syscall/unix
 internal/poll
-sort
 encoding/binary
+sort
 os
-encoding/base64
 crypto/des
+encoding/base64
 vendor/golang_org/x/crypto/poly1305
-vendor/golang_org/x/crypto/internal/chacha20
 vendor/golang_org/x/crypto/curve25519
-encoding/pem
-vendor/golang_org/x/crypto/chacha20poly1305
+vendor/golang_org/x/crypto/internal/chacha20
 path/filepath
 fmt
+encoding/pem
+vendor/golang_org/x/crypto/chacha20poly1305
 io/ioutil
 encoding/hex
 context
 log
-compress/flate
-vendor/golang_org/x/net/http2/hpack
-mime/quotedprintable
-net/http/internal
 net/url
 mime
+vendor/golang_org/x/net/http2/hpack
 encoding/json
 vendor/golang_org/x/text/unicode/norm
+compress/flate
 math/big
+mime/quotedprintable
 vendor/golang_org/x/text/unicode/bidi
+net/http/internal
 net
 vendor/golang_org/x/text/secure/bidirule
 compress/gzip
 vendor/golang_org/x/net/idna
-crypto/elliptic
 crypto/rand
-encoding/asn1
 crypto/dsa
+crypto/elliptic
+encoding/asn1
 crypto/rsa
 crypto/ecdsa
-crypto/x509/pkix
 vendor/golang_org/x/crypto/cryptobyte
+crypto/x509/pkix
 vendor/golang_org/x/net/http/httpproxy
 net/textproto
 crypto/x509
@@ -433,12 +445,14 @@
  dpkg-source --after-build .
 dpkg-buildpackage: info: binary-only upload (no source included)
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/1698/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/1698/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/58116 and its subdirectories
-I: Current time: Sat Jan 30 02:06:27 -12 2021
-I: pbuilder-time-stamp: 1612015587
+I: removing directory /srv/workspace/pbuilder/1698 and its subdirectories
+I: Current time: Sun Dec 29 21:49:04 +14 2019
+I: pbuilder-time-stamp: 1577605744