Diff of the two buildlogs:

--
--- b1/build.log	2024-12-17 00:54:04.519486175 +0000
+++ b2/build.log	2024-12-17 00:55:27.239707672 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Sun Jan 18 19:16:16 -12 2026
-I: pbuilder-time-stamp: 1768806976
+I: Current time: Tue Dec 17 14:54:06 +14 2024
+I: pbuilder-time-stamp: 1734396846
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/unstable-reproducible-base.tgz]
 I: copying local configuration
@@ -27,54 +27,86 @@
 dpkg-source: info: unpacking golang-github-opencontainers-image-spec_1.1.0-2.debian.tar.xz
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/9884/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/25605/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos2-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
+'/bin/sh' -> '/bin/bash'
+lrwxrwxrwx 1 root root 9 Dec 17 00:54 /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/25605/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/25605/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='i386'
-  DEBIAN_FRONTEND='noninteractive'
-  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=22 '
-  DISTRIBUTION='unstable'
-  HOME='/root'
-  HOST_ARCH='i386'
+  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]="37" [3]="1" [4]="release" [5]="i686-pc-linux-gnu")
+  BASH_VERSION='5.2.37(1)-release'
+  BUILDDIR=/build/reproducible-path
+  BUILDUSERGECOS='second user,second room,second work-phone,second home-phone,second other'
+  BUILDUSERNAME=pbuilder2
+  BUILD_ARCH=i386
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=10 '
+  DIRSTACK=()
+  DISTRIBUTION=unstable
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=i686
+  HOST_ARCH=i386
   IFS=' 	
   '
-  INVOCATION_ID='f956d6505573468f9ca1e052c69c213d'
-  LANG='C'
-  LANGUAGE='en_US:en'
-  LC_ALL='C'
-  LD_LIBRARY_PATH='/usr/lib/libeatmydata'
-  LD_PRELOAD='libeatmydata.so'
-  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='9884'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=a04ad3e3f4594aca858e9b9c2650b346
+  LANG=C
+  LANGUAGE=de_CH:de
+  LC_ALL=C
+  LD_LIBRARY_PATH=/usr/lib/libeatmydata
+  LD_PRELOAD=libeatmydata.so
+  MACHTYPE=i686-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=25605
   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.PybM02Pl/pbuilderrc_2Bp7 --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.PybM02Pl/b1 --logfile b1/build.log golang-github-opencontainers-image-spec_1.1.0-2.dsc'
-  SUDO_GID='112'
-  SUDO_UID='107'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://213.165.73.152:3128'
+  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.PybM02Pl/pbuilderrc_pnnU --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.PybM02Pl/b2 --logfile b2/build.log golang-github-opencontainers-image-spec_1.1.0-2.dsc'
+  SUDO_GID=112
+  SUDO_UID=107
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://46.16.76.132:3128
 I: uname -a
-  Linux ionos16-i386 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-28-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.119-1 (2024-11-22) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/9884/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/25605/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -163,7 +195,7 @@
 Get: 39 http://deb.debian.org/debian unstable/main i386 golang-github-xeipuuv-gojsonpointer-dev all 0.0~git20190905.02993c4-3 [5888 B]
 Get: 40 http://deb.debian.org/debian unstable/main i386 golang-github-xeipuuv-gojsonreference-dev all 0.0~git20180127.bd5ef7b-3 [5152 B]
 Get: 41 http://deb.debian.org/debian unstable/main i386 golang-github-xeipuuv-gojsonschema-dev all 1.2.0-3 [45.2 kB]
-Fetched 64.5 MB in 1s (97.3 MB/s)
+Fetched 64.5 MB in 1s (54.2 MB/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 ... 19952 files and directories currently installed.)
@@ -342,7 +374,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/golang-github-opencontainers-image-spec-1.1.0/ && 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-opencontainers-image-spec_1.1.0-2_source.changes
+I: user script /srv/workspace/pbuilder/25605/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for unstable
+I: user script /srv/workspace/pbuilder/25605/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/golang-github-opencontainers-image-spec-1.1.0/ && 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-opencontainers-image-spec_1.1.0-2_source.changes
 dpkg-buildpackage: info: source package golang-github-opencontainers-image-spec
 dpkg-buildpackage: info: source version 1.1.0-2
 dpkg-buildpackage: info: source distribution unstable
@@ -360,43 +396,43 @@
    dh_autoreconf -O--buildsystem=golang
    dh_auto_configure -O--buildsystem=golang
    dh_auto_build -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go install -trimpath -v -p 22 github.com/opencontainers/image-spec/identity github.com/opencontainers/image-spec/schema github.com/opencontainers/image-spec/specs-go github.com/opencontainers/image-spec/specs-go/v1
+	cd obj-i686-linux-gnu && go install -trimpath -v -p 10 github.com/opencontainers/image-spec/identity github.com/opencontainers/image-spec/schema github.com/opencontainers/image-spec/specs-go github.com/opencontainers/image-spec/specs-go/v1
 internal/godebugs
-internal/byteorder
+internal/goarch
 internal/coverage/rtcov
-internal/asan
-internal/unsafeheader
-unicode/utf8
-internal/goexperiment
+internal/byteorder
+internal/profilerecord
+internal/cpu
 internal/goos
-internal/msan
-internal/goarch
-crypto/internal/alias
+internal/goexperiment
+internal/runtime/atomic
+internal/unsafeheader
+internal/runtime/syscall
 internal/race
-cmp
-internal/itoa
 sync/atomic
 math/bits
-crypto/internal/boring/sig
-internal/profilerecord
-internal/runtime/atomic
-internal/runtime/syscall
-internal/cpu
+runtime/internal/math
+runtime/internal/sys
+internal/chacha8rand
+internal/abi
+unicode/utf8
 unicode
+crypto/internal/alias
+crypto/internal/boring/sig
+cmp
+math
+internal/itoa
+internal/asan
+internal/runtime/exithook
+internal/msan
 encoding
 unicode/utf16
+internal/bytealg
 log/internal
 internal/nettrace
 container/list
 vendor/golang.org/x/crypto/cryptobyte/asn1
 vendor/golang.org/x/crypto/internal/alias
-runtime/internal/math
-runtime/internal/sys
-internal/abi
-internal/chacha8rand
-math
-internal/bytealg
-internal/runtime/exithook
 internal/stringslite
 runtime
 iter
@@ -404,107 +440,107 @@
 crypto/subtle
 internal/reflectlite
 sync
-maps
 slices
+maps
 internal/singleflight
 internal/testlog
 internal/bisect
 runtime/cgo
 internal/godebug
 errors
-internal/oserror
-path
 io
-math/rand/v2
-math/rand
+internal/oserror
 sort
-vendor/golang.org/x/net/dns/dnsmessage
 strconv
-hash
+vendor/golang.org/x/net/dns/dnsmessage
+math/rand/v2
+path
 crypto/internal/edwards25519/field
-crypto/internal/randutil
-internal/concurrent
-bytes
-strings
 syscall
+math/rand
 crypto/internal/nistec/fiat
-hash/crc32
+hash
+bytes
+strings
+internal/concurrent
 unique
+hash/crc32
+crypto/internal/randutil
 crypto/internal/edwards25519
 crypto
-net/netip
-crypto/rc4
 reflect
-crypto/md5
-vendor/golang.org/x/text/transform
 crypto/cipher
-net/http/internal/ascii
-bufio
+crypto/md5
+net/netip
+crypto/rc4
 regexp/syntax
-crypto/des
+bufio
 crypto/internal/boring
 crypto/sha512
 crypto/sha256
-crypto/hmac
 crypto/aes
+crypto/des
+crypto/hmac
 crypto/sha1
 vendor/golang.org/x/crypto/hkdf
-regexp
+vendor/golang.org/x/text/transform
+net/http/internal/ascii
+time
 internal/syscall/execenv
 internal/syscall/unix
-time
+regexp
 crypto/internal/nistec
 context
 io/fs
 internal/poll
-internal/fmtsort
-encoding/binary
 internal/filepathlite
 embed
-crypto/ecdh
+internal/fmtsort
+encoding/binary
 os
+crypto/ecdh
 encoding/base64
-vendor/golang.org/x/crypto/internal/poly1305
 vendor/golang.org/x/crypto/chacha20
-vendor/golang.org/x/crypto/chacha20poly1305
+vendor/golang.org/x/crypto/internal/poly1305
 encoding/pem
+vendor/golang.org/x/crypto/chacha20poly1305
 io/ioutil
-path/filepath
-vendor/golang.org/x/sys/cpu
 fmt
+vendor/golang.org/x/sys/cpu
+path/filepath
 net
 vendor/golang.org/x/crypto/sha3
 github.com/opencontainers/image-spec/specs-go
+github.com/opencontainers/go-digest
 github.com/xeipuuv/gojsonpointer
+log
 net/url
-mime/quotedprintable
-encoding/hex
 compress/flate
-github.com/opencontainers/go-digest
-log
-net/http/internal
-text/template/parse
+encoding/hex
 encoding/json
-mime
-vendor/golang.org/x/net/http2/hpack
 math/big
 vendor/golang.org/x/text/unicode/norm
+vendor/golang.org/x/net/http2/hpack
+mime
 github.com/opencontainers/image-spec/identity
 github.com/opencontainers/image-spec/specs-go/v1
 vendor/golang.org/x/text/unicode/bidi
+mime/quotedprintable
+net/http/internal
 github.com/xeipuuv/gojsonreference
+text/template/parse
 compress/gzip
 vendor/golang.org/x/text/secure/bidirule
-text/template
 vendor/golang.org/x/net/idna
-crypto/internal/boring/bbig
-crypto/internal/bigmod
-crypto/dsa
+text/template
 crypto/rand
 crypto/elliptic
+crypto/internal/boring/bbig
+crypto/internal/bigmod
 encoding/asn1
-crypto/internal/hpke
+crypto/dsa
 crypto/ed25519
+crypto/internal/hpke
 crypto/internal/mlkem768
 crypto/rsa
 crypto/x509/pkix
@@ -522,7 +558,7 @@
 github.com/xeipuuv/gojsonschema
 github.com/opencontainers/image-spec/schema
    dh_auto_test -O--buildsystem=golang
-	cd obj-i686-linux-gnu && go test -vet=off -v -p 22 github.com/opencontainers/image-spec/identity github.com/opencontainers/image-spec/schema github.com/opencontainers/image-spec/specs-go github.com/opencontainers/image-spec/specs-go/v1
+	cd obj-i686-linux-gnu && go test -vet=off -v -p 10 github.com/opencontainers/image-spec/identity github.com/opencontainers/image-spec/schema github.com/opencontainers/image-spec/specs-go github.com/opencontainers/image-spec/specs-go/v1
 === RUN   TestChainID
 === RUN   TestChainID/nil
     chainid_test.go:64: before []
@@ -546,7 +582,7 @@
     --- PASS: TestChainID/two (0.00s)
     --- PASS: TestChainID/three (0.00s)
 PASS
-ok  	github.com/opencontainers/image-spec/identity	0.002s
+ok  	github.com/opencontainers/image-spec/identity	0.008s
 ?   	github.com/opencontainers/image-spec/specs-go	[no test files]
 ?   	github.com/opencontainers/image-spec/specs-go/v1	[no test files]
 === RUN   TestBackwardsCompatibilityImageIndex
@@ -566,7 +602,7 @@
 warning: unsupported digest: "multihash+base58:QmRZxt2b1FVZPNqd8hsiykDL3TdBDeTSPX9Kv46HmX4Gx8": unsupported digest algorithm
 warning: unsupported digest: "sha256+b64u:LCa0a2j_xo_5m0U8HTBBNBNCLXBkg7-g-YpeiGJm564": unsupported digest algorithm
 warning: unsupported digest: "sha256+b64u.unknownlength:LCa0a2j_xo_5m0U8HTBBNBNCLXBkg7-g-YpeiGJm564=": unsupported digest algorithm
---- PASS: TestDescriptor (0.02s)
+--- PASS: TestDescriptor (0.03s)
 === RUN   TestImageIndex
 warning: manifest sha256:e692418e4cbaf90ca69d05a66403747baa33ee08806650b51fab815ad7fc331f has an unknown media type: invalid
 warning: combination of os "linux" and architecture "" is invalid.
@@ -575,7 +611,7 @@
 warning: manifest sha256:5b0bcabd1ed22e9fb1310cf6c2dec7cdef19f0ad69efa1f392e94a4333501270 has an unknown media type: invalid
 warning: manifest sha256:5b0bcabd1ed22e9fb1310cf6c2dec7cdef19f0ad69efa1f392e94a4333501270 has an unknown media type: 
 warning: manifest sha256:e692418e4cbaf90ca69d05a66403747baa33ee08806650b51fab815ad7fc331f has an unknown media type: application/customized.manifest+json
---- PASS: TestImageIndex (0.02s)
+--- PASS: TestImageIndex (0.03s)
 === RUN   TestImageLayout
 --- PASS: TestImageLayout (0.00s)
 === RUN   TestManifest
@@ -584,7 +620,7 @@
 warning: layer sha256:9d3dd9504c685a304985025df4ed0283e47ac9ffa9bd0326fddf4d59513f0827 has an unknown media type: application/vnd.example.data+type
 warning: config sha256:44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a has an unknown media type: application/vnd.oci.empty.v1+json
 warning: layer sha256:9d3dd9504c685a304985025df4ed0283e47ac9ffa9bd0326fddf4d59513f0827 has an unknown media type: application/vnd.example+type
---- PASS: TestManifest (0.01s)
+--- PASS: TestManifest (0.02s)
 === RUN   TestValidateDescriptor
     spec_test.go:216: ok	application/vnd.oci.descriptor.v1+json	Content Descriptor
     spec_test.go:109: {
@@ -833,7 +869,7 @@
           }
         }
          ---
---- PASS: TestValidateImageLayout (0.00s)
+--- PASS: TestValidateImageLayout (0.01s)
 === RUN   TestValidateConfig
     spec_test.go:216: ok	application/vnd.oci.image.config.v1+json	Image JSON
     spec_test.go:109: {
@@ -897,7 +933,7 @@
 === RUN   TestSchemaFS
 --- PASS: TestSchemaFS (0.00s)
 PASS
-ok  	github.com/opencontainers/image-spec/schema	0.071s
+ok  	github.com/opencontainers/image-spec/schema	0.114s
    create-stamp debian/debhelper-build-stamp
    dh_testroot -O--buildsystem=golang
    dh_prep -O--buildsystem=golang
@@ -925,12 +961,14 @@
 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/25605/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/25605/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/9884 and its subdirectories
-I: Current time: Sun Jan 18 19:17:03 -12 2026
-I: pbuilder-time-stamp: 1768807023
+I: removing directory /srv/workspace/pbuilder/25605 and its subdirectories
+I: Current time: Tue Dec 17 14:55:26 +14 2024
+I: pbuilder-time-stamp: 1734396926