Diff of the two buildlogs:

--
--- b1/build.log	2024-05-29 10:28:35.926398758 +0000
+++ b2/build.log	2024-05-29 10:31:00.352232241 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Tue May 28 22:27:02 -12 2024
-I: pbuilder-time-stamp: 1716978422
+I: Current time: Wed Jul  2 06:51:36 +14 2025
+I: pbuilder-time-stamp: 1751388696
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -25,52 +25,84 @@
 dpkg-source: info: unpacking golang-github-tjfoc-gmsm_1.3.0+ds-4.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/3970708/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2603360/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos5-amd64.
+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
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Jul  1 16:51 /bin/sh -> /bin/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/2603360/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2603360/tmp/hooks/D02_print_environment starting
 I: set
-  BUILDDIR='/build/reproducible-path'
-  BUILDUSERGECOS='first user,first room,first work-phone,first home-phone,first other'
-  BUILDUSERNAME='pbuilder1'
-  BUILD_ARCH='amd64'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=20 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='amd64'
+  BASH=/bin/sh
+  BASHOPTS=checkwinsize:cmdhist:complete_fullquote:extquote:force_fignore:globasciiranges:globskipdots:hostcomplete:interactive_comments:patsub_replacement:progcomp:promptvars:sourcepath
+  BASH_ALIASES=()
+  BASH_ARGC=()
+  BASH_ARGV=()
+  BASH_CMDS=()
+  BASH_LINENO=([0]="12" [1]="0")
+  BASH_LOADABLES_PATH=/usr/local/lib/bash:/usr/lib/bash:/opt/local/lib/bash:/usr/pkg/lib/bash:/opt/pkg/lib/bash:.
+  BASH_SOURCE=([0]="/tmp/hooks/D02_print_environment" [1]="/tmp/hooks/D02_print_environment")
+  BASH_VERSINFO=([0]="5" [1]="2" [2]="21" [3]="1" [4]="release" [5]="x86_64-pc-linux-gnu")
+  BASH_VERSION='5.2.21(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='ead99a46dd3d4dc09fc9d3896792edf0'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  MAIL='/var/mail/root'
-  OPTIND='1'
-  PATH='/usr/sbin:/usr/bin:/sbin:/bin:/usr/games'
-  PBCURRENTCOMMANDLINEOPERATION='build'
-  PBUILDER_OPERATION='build'
-  PBUILDER_PKGDATADIR='/usr/share/pbuilder'
-  PBUILDER_PKGLIBDIR='/usr/lib/pbuilder'
-  PBUILDER_SYSCONFDIR='/etc'
-  PPID='3970708'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=51b3377d00a54b93b3ebc2a50f74d0a8
+  LANG=C
+  LANGUAGE=et_EE:et
+  LC_ALL=C
+  MACHTYPE=x86_64-pc-linux-gnu
+  MAIL=/var/mail/root
+  OPTERR=1
+  OPTIND=1
+  OSTYPE=linux-gnu
+  PATH=/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path
+  PBCURRENTCOMMANDLINEOPERATION=build
+  PBUILDER_OPERATION=build
+  PBUILDER_PKGDATADIR=/usr/share/pbuilder
+  PBUILDER_PKGLIBDIR=/usr/lib/pbuilder
+  PBUILDER_SYSCONFDIR=/etc
+  PIPESTATUS=([0]="0")
+  POSIXLY_CORRECT=y
+  PPID=2603360
   PS4='+ '
-  PWD='/'
-  SHELL='/bin/bash'
-  SHLVL='2'
-  SUDO_COMMAND='/usr/bin/timeout -k 18.1h 18h /usr/bin/ionice -c 3 /usr/bin/nice /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.MMg5kPhS/pbuilderrc_vkIg --distribution unstable --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.MMg5kPhS/b1 --logfile b1/build.log golang-github-tjfoc-gmsm_1.3.0+ds-4.dsc'
-  SUDO_GID='111'
-  SUDO_UID='106'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://46.16.76.132:3128'
+  PWD=/
+  SHELL=/bin/bash
+  SHELLOPTS=braceexpand:errexit:hashall:interactive-comments:posix
+  SHLVL=3
+  SUDO_COMMAND='/usr/bin/timeout -k 24.1h 24h /usr/bin/ionice -c 3 /usr/bin/nice -n 11 /usr/bin/unshare --uts -- /usr/sbin/pbuilder --build --configfile /srv/reproducible-results/rbuild-debian/r-b-build.MMg5kPhS/pbuilderrc_KJib --distribution unstable --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/unstable-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.MMg5kPhS/b2 --logfile b2/build.log golang-github-tjfoc-gmsm_1.3.0+ds-4.dsc'
+  SUDO_GID=110
+  SUDO_UID=105
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://213.165.73.152:3128
 I: uname -a
-  Linux ionos11-amd64 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.7.12+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1~bpo12+1 (2024-05-06) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 May 27 07:42 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/3970708/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Jun 29 14:05 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2603360/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -151,7 +183,7 @@
 Get: 37 http://deb.debian.org/debian unstable/main amd64 golang-golang-x-term-dev all 0.20.0-1 [14.8 kB]
 Get: 38 http://deb.debian.org/debian unstable/main amd64 golang-golang-x-text-dev all 0.15.0-1 [4006 kB]
 Get: 39 http://deb.debian.org/debian unstable/main amd64 golang-golang-x-crypto-dev all 1:0.23.0-1 [1689 kB]
-Fetched 68.8 MB in 2s (36.3 MB/s)
+Fetched 68.8 MB in 8s (9144 kB/s)
 debconf: delaying package configuration, since apt-utils is not installed
 Selecting previously unselected package sensible-utils.
 (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 ... 19716 files and directories currently installed.)
@@ -322,7 +354,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-tjfoc-gmsm-1.3.0+ds/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games" HOME="/nonexistent/first-build" dpkg-genchanges -S  > ../golang-github-tjfoc-gmsm_1.3.0+ds-4_source.changes
+I: user script /srv/workspace/pbuilder/2603360/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/2603360/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-tjfoc-gmsm-1.3.0+ds/ && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-buildpackage -us -uc -b && env PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path" HOME="/nonexistent/second-build" dpkg-genchanges -S  > ../golang-github-tjfoc-gmsm_1.3.0+ds-4_source.changes
 dpkg-buildpackage: info: source package golang-github-tjfoc-gmsm
 dpkg-buildpackage: info: source version 1.3.0+ds-4
 dpkg-buildpackage: info: source distribution unstable
@@ -340,33 +376,33 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-x86_64-linux-gnu && go install -trimpath -v -p 20 github.com/tjfoc/gmsm/sm2 github.com/tjfoc/gmsm/sm3 github.com/tjfoc/gmsm/sm4
-crypto/internal/alias
-cmp
-internal/goarch
+	cd obj-x86_64-linux-gnu && go install -trimpath -v -p 42 github.com/tjfoc/gmsm/sm2 github.com/tjfoc/gmsm/sm3 github.com/tjfoc/gmsm/sm4
+internal/unsafeheader
 internal/coverage/rtcov
-internal/goexperiment
-unicode/utf8
-internal/goos
+internal/itoa
+crypto/internal/alias
+internal/nettrace
 unicode/utf16
-internal/race
-unicode
-sync/atomic
+internal/goarch
+internal/cpu
+math/bits
 internal/godebugs
-internal/itoa
-runtime/internal/atomic
+internal/goexperiment
+crypto/internal/boring/sig
+cmp
 vendor/golang.org/x/crypto/cryptobyte/asn1
-math/bits
-internal/unsafeheader
-internal/cpu
+sync/atomic
+crypto/subtle
+internal/race
 runtime/internal/syscall
+internal/goos
+runtime/internal/atomic
+unicode
+unicode/utf8
 internal/chacha8rand
 runtime/internal/math
-crypto/internal/boring/sig
-internal/nettrace
-crypto/subtle
-internal/abi
 runtime/internal/sys
+internal/abi
 slices
 internal/bytealg
 math
@@ -374,25 +410,25 @@
 internal/reflectlite
 sync
 internal/testlog
-internal/singleflight
 internal/bisect
+internal/singleflight
 runtime/cgo
 errors
-sort
 internal/godebug
-io
-strconv
-vendor/golang.org/x/net/dns/dnsmessage
+sort
+internal/oserror
 internal/safefilepath
+io
 path
-internal/oserror
-crypto/internal/nistec/fiat
-syscall
 internal/intern
+vendor/golang.org/x/net/dns/dnsmessage
 math/rand
-bytes
-crypto/internal/randutil
+strconv
+crypto/internal/nistec/fiat
+syscall
 hash
+crypto/internal/randutil
+bytes
 strings
 crypto
 net/netip
@@ -401,47 +437,47 @@
 internal/syscall/execenv
 internal/syscall/unix
 time
-context
 io/fs
+context
 internal/poll
 encoding/binary
 internal/fmtsort
 embed
 os
-crypto/cipher
 crypto/internal/edwards25519/field
-encoding/base64
-crypto/md5
-crypto/internal/nistec
+crypto/cipher
 github.com/tjfoc/gmsm/sm3
+crypto/md5
+encoding/base64
 golang.org/x/crypto/sha3
+crypto/internal/nistec
 encoding/pem
-crypto/internal/boring
-crypto/des
 crypto/internal/edwards25519
-crypto/aes
+crypto/des
+crypto/internal/boring
 crypto/hmac
-crypto/sha1
 crypto/sha512
+crypto/sha1
 crypto/sha256
+crypto/aes
 io/ioutil
-fmt
 path/filepath
+fmt
 net
 crypto/ecdh
 encoding/hex
 net/url
 math/big
 crypto/dsa
-crypto/elliptic
-crypto/internal/bigmod
 crypto/internal/boring/bbig
 encoding/asn1
 crypto/rand
+crypto/elliptic
+crypto/internal/bigmod
 crypto/ed25519
 crypto/rsa
-vendor/golang.org/x/crypto/cryptobyte
 crypto/x509/pkix
+vendor/golang.org/x/crypto/cryptobyte
 crypto/ecdsa
 github.com/tjfoc/gmsm/sm2
 crypto/x509
@@ -449,7 +485,7 @@
    debian/rules override_dh_auto_test
 make[1]: Entering directory '/build/reproducible-path/golang-github-tjfoc-gmsm-1.3.0+ds'
 dh_auto_test
-	cd obj-x86_64-linux-gnu && go test -vet=off -v -p 20 github.com/tjfoc/gmsm/sm2 github.com/tjfoc/gmsm/sm3 github.com/tjfoc/gmsm/sm4
+	cd obj-x86_64-linux-gnu && go test -vet=off -v -p 42 github.com/tjfoc/gmsm/sm2 github.com/tjfoc/gmsm/sm3 github.com/tjfoc/gmsm/sm4
 === RUN   TestSm2
 true
 clear text = 123456
@@ -459,7 +495,7 @@
 CheckSignature ok
 --- PASS: TestSm2 (0.02s)
 PASS
-ok  	github.com/tjfoc/gmsm/sm2	0.032s
+ok  	github.com/tjfoc/gmsm/sm2	0.022s
 === RUN   TestSm3
 [85 225 46 145 101 13 47 236 86 236 116 225 211 228 221 191 206 46 243 166 88 144 194 161 158 207 136 163 7 231 106 35]
 hash = 32
@@ -470,7 +506,7 @@
 55e12e91650d2fec56ec74e1d3e4ddbfce2ef3a65890c2a19ecf88a307e76a23
 --- PASS: TestSm3 (0.00s)
 PASS
-ok  	github.com/tjfoc/gmsm/sm3	0.005s
+ok  	github.com/tjfoc/gmsm/sm3	0.004s
 === RUN   TestSM4
 key = [49 50 51 52 53 54 55 56 57 48 97 98 99 100 101 102]
 key = [49 50 51 52 53 54 55 56 57 48 97 98 99 100 101 102]
@@ -487,7 +523,7 @@
 ------------------end----------------------
 --- PASS: TestErrKeyLen (0.00s)
 PASS
-ok  	github.com/tjfoc/gmsm/sm4	0.007s
+ok  	github.com/tjfoc/gmsm/sm4	0.005s
 find -type f \( -name '*.pem' -or -name 'ofile' \) -delete
 make[1]: Leaving directory '/build/reproducible-path/golang-github-tjfoc-gmsm-1.3.0+ds'
    create-stamp debian/debhelper-build-stamp
@@ -518,12 +554,14 @@
 dpkg-buildpackage: info: binary-only upload (no source included)
 dpkg-genchanges: info: not including original source code in upload
 I: copying local configuration
+I: user script /srv/workspace/pbuilder/2603360/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2603360/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/3970708 and its subdirectories
-I: Current time: Tue May 28 22:28:30 -12 2024
-I: pbuilder-time-stamp: 1716978510
+I: removing directory /srv/workspace/pbuilder/2603360 and its subdirectories
+I: Current time: Wed Jul  2 06:53:56 +14 2025
+I: pbuilder-time-stamp: 1751388836