Diff of the two buildlogs:

--
--- b1/build.log	2020-04-02 04:34:11.991484642 +0000
+++ b2/build.log	2020-04-02 04:40:50.239453129 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue May  4 22:56:34 -12 2021
-I: pbuilder-time-stamp: 1620212194
+I: Current time: Thu Apr  2 18:34:17 +14 2020
+I: pbuilder-time-stamp: 1585802057
 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 Sun Sep 17 13:19:02 2017 -12
+gpgv: Signature made Mon Sep 18 15:19:02 2017 +14
 gpgv:                using RSA key 5E629EE5232197357B84CF4332247FBB40AD1FA6
 gpgv: Can't check signature: No public key
 dpkg-source: warning: failed to verify signature on ./golang-github-moul-http2curl_0.0~git20161031.0.4e24498+dfsg-1.dsc
@@ -27,6 +27,18 @@
 dpkg-source: info: unpacking golang-github-moul-http2curl_0.0~git20161031.0.4e24498+dfsg-1.debian.tar.xz
 I: using fakeroot in build.
 I: Installing the build-deps
+I: user script /srv/workspace/pbuilder/27491/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/27491/tmp/hooks/D01_modify_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -118,7 +130,7 @@
 Get: 48 http://deb.debian.org/debian buster/main i386 golang-github-jtolds-gls-dev all 4.2.1-4 [7336 B]
 Get: 49 http://deb.debian.org/debian buster/main i386 golang-github-smartystreets-assertions-dev all 1.6.0+dfsg-1 [24.2 kB]
 Get: 50 http://deb.debian.org/debian buster/main i386 golang-github-smartystreets-goconvey-dev all 1.6.1-3 [48.8 kB]
-Fetched 79.7 MB in 1s (73.2 MB/s)
+Fetched 79.7 MB in 32s (2514 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package libbsd0:i386.
 (Reading database ... 
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(Reading database ... 19231 files and directories currently installed.)
@@ -341,7 +353,7 @@
 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-moul-http2curl-0.0~git20161031.0.4e24498+dfsg/ && 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-moul-http2curl-0.0~git20161031.0.4e24498+dfsg/ && 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-moul-http2curl
 dpkg-buildpackage: info: source version 0.0~git20161031.0.4e24498+dfsg-1
 dpkg-buildpackage: info: source distribution unstable
@@ -359,26 +371,26 @@
    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-github-moul-http2curl-0.0\~git20161031.0.4e24498\+dfsg/obj-i686-linux-gnu/src\" -asmflags=all=\"-trimpath=/build/golang-github-moul-http2curl-0.0\~git20161031.0.4e24498\+dfsg/obj-i686-linux-gnu/src\" -v -p 18 github.com/moul/http2curl
+	cd obj-i686-linux-gnu && go install -gcflags=all=\"-trimpath=/build/golang-github-moul-http2curl-0.0\~git20161031.0.4e24498\+dfsg/obj-i686-linux-gnu/src\" -asmflags=all=\"-trimpath=/build/golang-github-moul-http2curl-0.0\~git20161031.0.4e24498\+dfsg/obj-i686-linux-gnu/src\" -v -p 10 github.com/moul/http2curl
 errors
-container/list
-internal/nettrace
 internal/race
-unicode
+math/bits
 unicode/utf8
+unicode
 internal/cpu
-crypto/internal/subtle
-math/bits
-vendor/golang_org/x/net/dns/dnsmessage
-vendor/golang_org/x/crypto/cryptobyte/asn1
-runtime/internal/sys
-crypto/subtle
 sync/atomic
 runtime/internal/atomic
-runtime/cgo
+runtime/internal/sys
+container/list
+crypto/internal/subtle
 math
+vendor/golang_org/x/crypto/cryptobyte/asn1
 internal/testlog
+crypto/subtle
+vendor/golang_org/x/net/dns/dnsmessage
+internal/nettrace
 internal/bytealg
+runtime/cgo
 runtime
 strconv
 crypto/rc4
@@ -388,64 +400,64 @@
 math/rand
 reflect
 syscall
+hash
 bytes
-strings
 crypto/internal/randutil
-hash
+strings
 crypto/cipher
-crypto
 hash/crc32
+crypto
 crypto/hmac
-crypto/sha512
 crypto/sha1
+crypto/sha512
 crypto/md5
 crypto/sha256
 crypto/aes
-vendor/golang_org/x/text/transform
 bufio
+vendor/golang_org/x/text/transform
 path
 internal/syscall/unix
 time
 internal/poll
+os
 encoding/binary
 sort
-os
-encoding/base64
+path/filepath
+fmt
 crypto/des
+encoding/base64
 vendor/golang_org/x/crypto/poly1305
 vendor/golang_org/x/crypto/internal/chacha20
 vendor/golang_org/x/crypto/curve25519
 vendor/golang_org/x/crypto/chacha20poly1305
 encoding/pem
-path/filepath
-fmt
 io/ioutil
 encoding/hex
+net/url
 context
 log
-net/url
-compress/flate
 mime/quotedprintable
-vendor/golang_org/x/text/unicode/norm
 mime
-net/http/internal
+compress/flate
 vendor/golang_org/x/net/http2/hpack
+vendor/golang_org/x/text/unicode/norm
+net/http/internal
 math/big
 vendor/golang_org/x/text/unicode/bidi
 net
-vendor/golang_org/x/text/secure/bidirule
 compress/gzip
+vendor/golang_org/x/text/secure/bidirule
 vendor/golang_org/x/net/idna
-crypto/rand
 crypto/dsa
 encoding/asn1
+crypto/rand
 crypto/elliptic
 crypto/rsa
 crypto/ecdsa
 crypto/x509/pkix
 vendor/golang_org/x/crypto/cryptobyte
-vendor/golang_org/x/net/http/httpproxy
 net/textproto
+vendor/golang_org/x/net/http/httpproxy
 crypto/x509
 vendor/golang_org/x/net/http/httpguts
 mime/multipart
@@ -454,7 +466,7 @@
 net/http
 github.com/moul/http2curl
    dh_auto_test -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go test -vet=off -v -p 18 github.com/moul/http2curl
+	cd obj-i686-linux-gnu && go test -vet=off -v -p 10 github.com/moul/http2curl
 === RUN   TestGetCurlCommand
 
   Testing http2curl ✔✔✔
@@ -476,7 +488,7 @@
 === RUN   ExampleGetCurlCommand_specialCharsInBody
 --- PASS: ExampleGetCurlCommand_specialCharsInBody (0.00s)
 PASS
-ok  	github.com/moul/http2curl	0.006s
+ok  	github.com/moul/http2curl	0.012s
    create-stamp debian/debhelper-build-stamp
  fakeroot debian/rules binary
 dh binary --buildsystem=golang --with=golang
@@ -512,12 +524,14 @@
  dpkg-source --after-build .
 dpkg-buildpackage: info: binary-only upload (no source included)
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/27491/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/27491/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/55297 and its subdirectories
-I: Current time: Tue May  4 22:57:11 -12 2021
-I: pbuilder-time-stamp: 1620212231
+I: removing directory /srv/workspace/pbuilder/27491 and its subdirectories
+I: Current time: Thu Apr  2 18:40:49 +14 2020
+I: pbuilder-time-stamp: 1585802449