Diff of the two buildlogs:

--
--- b1/build.log	2025-02-25 03:58:29.063065160 +0000
+++ b2/build.log	2025-02-25 03:59:54.407225350 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Feb 24 15:55:02 -12 2025
-I: pbuilder-time-stamp: 1740455702
+I: Current time: Tue Mar 31 00:21:30 +14 2026
+I: pbuilder-time-stamp: 1774866090
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -29,52 +29,84 @@
 dpkg-source: info: applying fix-for-node-mime-2.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/2577958/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/842184/tmp/hooks/D01_modify_environment starting
+debug: Running on ionos15-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 Mar 30 10:21 /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/842184/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/842184/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='trixie'
-  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]="37" [3]="1" [4]="release" [5]="x86_64-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=amd64
+  DEBIAN_FRONTEND=noninteractive
+  DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=42 '
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=x86_64
+  HOST_ARCH=amd64
   IFS=' 	
   '
-  INVOCATION_ID='4e97d951bf4c4c27ad4ccb876fba7614'
-  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='2577958'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=a0f426e076f44c1894ce57e1280333ac
+  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=842184
   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.NKgy5YlE/pbuilderrc_ENB1 --distribution trixie --hookdir /etc/pbuilder/first-build-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.NKgy5YlE/b1 --logfile b1/build.log node-express_4.21.0+~cs8.36.26-2.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.NKgy5YlE/pbuilderrc_E3Rr --distribution trixie --hookdir /etc/pbuilder/rebuild-hooks --debbuildopts -b --basetgz /var/cache/pbuilder/trixie-reproducible-base.tgz --buildresult /srv/reproducible-results/rbuild-debian/r-b-build.NKgy5YlE/b2 --logfile b2/build.log node-express_4.21.0+~cs8.36.26-2.dsc'
+  SUDO_GID=111
+  SUDO_UID=106
+  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 6.1.0-31-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.128-1 (2025-02-07) x86_64 GNU/Linux
+  Linux i-capture-the-hostname 6.12.9+bpo-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.12.9-1~bpo12+1 (2025-01-19) x86_64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/2577958/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/842184/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -609,7 +641,7 @@
 Get: 395 http://deb.debian.org/debian trixie/main amd64 node-uid-safe all 2.1.5+~2.1.2-1 [5928 B]
 Get: 396 http://deb.debian.org/debian trixie/main amd64 node-vary all 1.1.2+~1.1.0-1 [6724 B]
 Get: 397 http://deb.debian.org/debian trixie/main amd64 node-vhost all 3.0.2-6 [6444 B]
-Fetched 62.2 MB in 13s (4722 kB/s)
+Fetched 62.2 MB in 7s (8712 kB/s)
 Preconfiguring packages ...
 Selecting previously unselected package netbase.
 (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 ... 19802 files and directories currently installed.)
@@ -2225,7 +2257,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/node-express-4.21.0+~cs8.36.26/ && 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  > ../node-express_4.21.0+~cs8.36.26-2_source.changes
+I: user script /srv/workspace/pbuilder/842184/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/842184/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/node-express-4.21.0+~cs8.36.26/ && 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  > ../node-express_4.21.0+~cs8.36.26-2_source.changes
 dpkg-buildpackage: info: source package node-express
 dpkg-buildpackage: info: source version 4.21.0+~cs8.36.26-2
 dpkg-buildpackage: info: source distribution unstable
@@ -2292,7 +2328,7 @@
 
   Route
     undefined should work without handlers
-    undefined should not stack overflow with a large sync stack (61ms)
+    undefined should not stack overflow with a large sync stack
     .all
       undefined should add handler
       undefined should handle VERBS
@@ -2315,9 +2351,9 @@
     undefined should handle blank URL
     undefined should handle missing URL
     undefined handle missing method
-    undefined should not stack overflow with many registered routes (328ms)
-    undefined should not stack overflow with a large sync route stack (100ms)
-    undefined should not stack overflow with a large sync middleware stack (66ms)
+    undefined should not stack overflow with many registered routes (125ms)
+    undefined should not stack overflow with a large sync route stack
+    undefined should not stack overflow with a large sync middleware stack
     .handle
       undefined should dispatch
     .multiple callbacks
@@ -2354,10 +2390,10 @@
       undefined should only call once per request
       undefined should call when values differ
     parallel requests
-      undefined should not mix requests (51ms)
+      undefined should not mix requests (50ms)
 
   app.all()
-    undefined should add a router per method (88ms)
+    undefined should add a router per method
     undefined should run the callback for a method just once
 
   app.del()
@@ -2912,7 +2948,7 @@
       undefined should be not be enabled by default
       undefined should be configurable
       undefined should support disabling extensions
-      undefined should support fallbacks (38ms)
+      undefined should support fallbacks
       undefined should 404 if nothing found
     fallthrough
       undefined should default to true
@@ -3018,7 +3054,7 @@
       undefined should accept number of bytes
       undefined should not change when options altered
       undefined should not hang response
-      undefined should not error when inflating (106ms)
+      undefined should not error when inflating (102ms)
     with inflate option
       when false
         undefined should not accept content-encoding
@@ -3103,16 +3139,16 @@
         undefined should 413 if over limit
         undefined should work when at the limit
         undefined should work if number is floating point
-        undefined should work with large limit (45ms)
-        undefined should work with Infinity limit (64ms)
+        undefined should work with large limit
+        undefined should work with Infinity limit
       with extended: true
         undefined should reject 0
         undefined should reject string
         undefined should 413 if over limit
         undefined should work when at the limit
         undefined should work if number is floating point
-        undefined should work with large limit (110ms)
-        undefined should work with Infinity limit (197ms)
+        undefined should work with large limit (40ms)
+        undefined should work with Infinity limit (67ms)
     with type option
       when "application/vnd.x-www-form-urlencoded"
         undefined should parse for custom type
@@ -4033,18 +4069,18 @@
     GET /login
       undefined should render login form
       undefined should display login error for bad user
-(node:2620959) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
+(node:864627) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
 (Use `node --trace-deprecation ...` to show where the warning was created)
-      undefined should display login error for bad password (120ms)
+      undefined should display login error for bad password (51ms)
     GET /logout
       undefined should redirect to /
     GET /restricted
       undefined should redirect to /login without cookie
-      undefined should succeed with proper cookie (92ms)
+      undefined should succeed with proper cookie (78ms)
     POST /login
       undefined should fail without proper username
-      undefined should fail without proper password (78ms)
-      undefined should succeed with proper credentials (76ms)
+      undefined should fail without proper password (42ms)
+      undefined should succeed with proper credentials (42ms)
 
   content-negotiation
     GET /
@@ -4079,7 +4115,7 @@
     GET /files/notes/groceries.txt
       undefined should have a download header
     GET /files/amazing.txt
-      undefined should have a download header (53ms)
+      undefined should have a download header
     GET /files/missing.txt
       undefined should respond with 404
     GET /files/../index.js
@@ -4130,7 +4166,7 @@
 
   markdown
     GET /
-      undefined should respond with html (48ms)
+      undefined should respond with html
     GET /fail
       undefined should respond with an error
 
@@ -4258,7 +4294,7 @@
       undefined should respond with 404 json
 
 
-  1269 passing (9s)
+  1269 passing (4s)
 
 Removing node_modules/cookie-session
 Removing node_modules/express-session
@@ -4280,19 +4316,19 @@
 	mkdir -p /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/
 	install -m 644 ./index.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express//
 	mkdir -p /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib
+	install -m 644 ./lib/utils.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
+	install -m 644 ./lib/application.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
+	install -m 644 ./lib/express.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
 	install -m 644 ./lib/response.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
 	install -m 644 ./lib/view.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
-	install -m 644 ./lib/express.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
 	install -m 644 ./lib/request.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
-	install -m 644 ./lib/application.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
-	install -m 644 ./lib/utils.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/
+	mkdir -p /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/middleware
+	install -m 644 ./lib/middleware/init.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/middleware/
+	install -m 644 ./lib/middleware/query.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/middleware/
 	mkdir -p /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/router
 	install -m 644 ./lib/router/index.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/router/
 	install -m 644 ./lib/router/layer.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/router/
 	install -m 644 ./lib/router/route.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/router/
-	mkdir -p /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/middleware
-	install -m 644 ./lib/middleware/query.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/middleware/
-	install -m 644 ./lib/middleware/init.js /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express/lib/middleware/
 	install -m 644 ./package.json /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express//
 	install -m 644 ./package.json /build/reproducible-path/node-express-4.21.0\+\~cs8.36.26/debian/node-express//usr/share/nodejs/express//
 dh_auto_install: warning: ### Missing debian/build_modules/path-to-regexp/build/config.gypi, skipping
@@ -4345,12 +4381,14 @@
 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/842184/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/842184/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/2577958 and its subdirectories
-I: Current time: Mon Feb 24 15:58:28 -12 2025
-I: pbuilder-time-stamp: 1740455908
+I: removing directory /srv/workspace/pbuilder/842184 and its subdirectories
+I: Current time: Tue Mar 31 00:22:53 +14 2026
+I: pbuilder-time-stamp: 1774866173