Diff of the two buildlogs:

--
--- b1/build.log	2025-03-04 12:14:51.288638536 +0000
+++ b2/build.log	2025-03-04 12:16:03.353387662 +0000
@@ -1,6 +1,6 @@
 I: pbuilder: network access will be disabled during build
-I: Current time: Mon Apr  6 06:37:07 -12 2026
-I: pbuilder-time-stamp: 1775500627
+I: Current time: Wed Mar  5 02:14:54 +14 2025
+I: pbuilder-time-stamp: 1741090494
 I: Building the build Environment
 I: extracting base tarball [/var/cache/pbuilder/trixie-reproducible-base.tgz]
 I: copying local configuration
@@ -26,52 +26,84 @@
 dpkg-source: info: applying compiler-warnings.patch
 I: Not using root during the build.
 I: Installing the build-deps
-I: user script /srv/workspace/pbuilder/129615/tmp/hooks/D02_print_environment starting
+I: user script /srv/workspace/pbuilder/2712322/tmp/hooks/D01_modify_environment starting
+debug: Running on codethink04-arm64.
+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  4 12:15 /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/2712322/tmp/hooks/D01_modify_environment finished
+I: user script /srv/workspace/pbuilder/2712322/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='arm64'
-  DEBIAN_FRONTEND='noninteractive'
+  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]="aarch64-unknown-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=arm64
+  DEBIAN_FRONTEND=noninteractive
   DEB_BUILD_OPTIONS='buildinfo=+all reproducible=+all parallel=12 '
-  DISTRIBUTION='trixie'
-  HOME='/root'
-  HOST_ARCH='arm64'
+  DIRSTACK=()
+  DISTRIBUTION=trixie
+  EUID=0
+  FUNCNAME=([0]="Echo" [1]="main")
+  GROUPS=()
+  HOME=/root
+  HOSTNAME=i-capture-the-hostname
+  HOSTTYPE=aarch64
+  HOST_ARCH=arm64
   IFS=' 	
   '
-  INVOCATION_ID='efb67992345247b8bff66ba53e1808e8'
-  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='129615'
-  PS1='# '
-  PS2='> '
+  INVOCATION_ID=89b0b1f313664d418b9e63386c41a611
+  LANG=C
+  LANGUAGE=nl_BE:nl
+  LC_ALL=C
+  MACHTYPE=aarch64-unknown-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=2712322
   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.U1k4vGam/pbuilderrc_xexr --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.U1k4vGam/b1 --logfile b1/build.log chess.app_2.8-6.dsc'
-  SUDO_GID='109'
-  SUDO_UID='104'
-  SUDO_USER='jenkins'
-  TERM='unknown'
-  TZ='/usr/share/zoneinfo/Etc/GMT+12'
-  USER='root'
-  _='/usr/bin/systemd-run'
-  http_proxy='http://192.168.101.4:3128'
+  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.U1k4vGam/pbuilderrc_lKfN --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.U1k4vGam/b2 --logfile b2/build.log chess.app_2.8-6.dsc'
+  SUDO_GID=109
+  SUDO_UID=104
+  SUDO_USER=jenkins
+  TERM=unknown
+  TZ=/usr/share/zoneinfo/Etc/GMT-14
+  UID=0
+  USER=root
+  _='I: set'
+  http_proxy=http://192.168.101.4:3128
 I: uname -a
-  Linux codethink03-arm64 6.1.0-31-cloud-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
+  Linux i-capture-the-hostname 6.1.0-31-cloud-arm64 #1 SMP Debian 6.1.128-1 (2025-02-07) aarch64 GNU/Linux
 I: ls -l /bin
-  lrwxrwxrwx 1 root root 7 Nov 22  2024 /bin -> usr/bin
-I: user script /srv/workspace/pbuilder/129615/tmp/hooks/D02_print_environment finished
+  lrwxrwxrwx 1 root root 7 Nov 22 14:40 /bin -> usr/bin
+I: user script /srv/workspace/pbuilder/2712322/tmp/hooks/D02_print_environment finished
  -> Attempting to satisfy build-dependencies
  -> Creating pbuilder-satisfydepends-dummy package
 Package: pbuilder-satisfydepends-dummy
@@ -252,7 +284,7 @@
 Get: 137 http://deb.debian.org/debian trixie/main arm64 icnsutils arm64 0.8.1.83.g921f972-0.1+b2 [20.9 kB]
 Get: 138 http://deb.debian.org/debian trixie/main arm64 libgnustep-base-dev arm64 1.30.0-14 [2117 kB]
 Get: 139 http://deb.debian.org/debian trixie/main arm64 libgnustep-gui-dev arm64 0.31.1-10 [2146 kB]
-Fetched 88.7 MB in 2s (40.0 MB/s)
+Fetched 88.7 MB in 1s (109 MB/s)
 Preconfiguring packages ...
 Selecting previously unselected package libfftw3-double3:arm64.
 (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 ... 19916 files and directories currently installed.)
@@ -708,8 +740,8 @@
 Setting up tzdata (2025a-2) ...
 
 Current default time zone: 'Etc/UTC'
-Local time is now:      Mon Apr  6 18:37:34 UTC 2026.
-Universal Time is now:  Mon Apr  6 18:37:34 UTC 2026.
+Local time is now:      Tue Mar  4 12:15:41 UTC 2025.
+Universal Time is now:  Tue Mar  4 12:15:41 UTC 2025.
 Run 'dpkg-reconfigure tzdata' if you wish to change it.
 
 Setting up libasound2-data (1.2.13-1) ...
@@ -839,7 +871,11 @@
 Building tag database...
  -> Finished parsing the build-deps
 I: Building the package
-I: Running cd /build/reproducible-path/chess.app-2.8/ && 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  > ../chess.app_2.8-6_source.changes
+I: user script /srv/workspace/pbuilder/2712322/tmp/hooks/A99_set_merged_usr starting
+Not re-configuring usrmerge for trixie
+I: user script /srv/workspace/pbuilder/2712322/tmp/hooks/A99_set_merged_usr finished
+hostname: Name or service not known
+I: Running cd /build/reproducible-path/chess.app-2.8/ && 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  > ../chess.app_2.8-6_source.changes
 dpkg-buildpackage: info: source package chess.app
 dpkg-buildpackage: info: source version 2.8-6
 dpkg-buildpackage: info: source distribution unstable
@@ -909,12 +945,7 @@
 aarch64-linux-gnu-g++ ChessListener.cp -c \
       -MMD -MP -Wdate-time -D_FORTIFY_SOURCE=2 -DGNUSTEP -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 -DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1 -pthread -pthread -fPIC -Wall -DGSWARN -DGSDIAGNOSE -Wno-import -g -O2 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/chess.app-2.8=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -mbranch-protection=standard -I. -I/usr/include/aarch64-linux-gnu/GNUstep -I/usr/include -g -O2 \
        -o obj/Chess.obj/ChessListener.cp.o
-cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
 gnuchess.c: In function 'KingScan':
-In file included from Board.m:55:
-/usr/include/aarch64-linux-gnu/GNUstep/Foundation/NSUtilities.h:28:2: warning: #warning The use of NSUtilities.h is deprecated [-Wcpp]
-   28 | #warning        The use of NSUtilities.h is deprecated
-      |  ^~~~~~~
 gnuchess.c:2051:6: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
  2051 |   if (color[u] != c2)                           \
       |      ^
@@ -937,18 +968,15 @@
 /usr/include/aarch64-linux-gnu/GNUstep/Foundation/NSUtilities.h:28:2: warning: #warning The use of NSUtilities.h is deprecated [-Wcpp]
    28 | #warning        The use of NSUtilities.h is deprecated
       |  ^~~~~~~
+cc1plus: warning: '-Werror=' argument '-Werror=implicit-function-declaration' is not valid for C++
+In file included from Board.m:55:
+/usr/include/aarch64-linux-gnu/GNUstep/Foundation/NSUtilities.h:28:2: warning: #warning The use of NSUtilities.h is deprecated [-Wcpp]
+   28 | #warning        The use of NSUtilities.h is deprecated
+      |  ^~~~~~~
 ChessListener.cp: In member function 'virtual void CLDebugMoveBuilder::Move(int, const CLCoord&, const CLCoord&, bool, bool)':
 ChessListener.cp:131:38: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   131 |         static char * pieceName[] = {"", "Pawn", "Knight", "Bishop", "Rook", "Queen", "King"};
       |                                      ^~
-Chess.m: In function 'CL_MakeMove':
-Chess.m:83:17: warning: 'NSApplication' may not respond to '-undoMove:'
-   83 |                 [NSApp undoMove:NSApp];
-      |                 ^
-Chess.m:83:17: warning: (messages without a matching method signature will be assumed to return 'id' and accept '...' as arguments)
-Chess.m:90:17: warning: 'NSApplication' may not respond to '-makeMoveFrom::to::'
-   90 |                 [NSApp makeMoveFrom: r : c to: r2 : c2];
-      |                 ^
 ChessListener.cp:131:42: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   131 |         static char * pieceName[] = {"", "Pawn", "Knight", "Bishop", "Rook", "Queen", "King"};
       |                                          ^~~~~~
@@ -967,6 +995,18 @@
 ChessListener.cp:131:87: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]
   131 |         static char * pieceName[] = {"", "Pawn", "Knight", "Bishop", "Rook", "Queen", "King"};
       |                                                                                       ^~~~~~
+ChessListener.cp: In member function 'bool CLMoveGenerator::TryMove(int, const CLCoord&, const CLCoord&)':
+ChessListener.cp:571:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
+  571 |         if (piece == PAWN) // Pawns move straight, capture diagonally
+      |            ^
+Chess.m: In function 'CL_MakeMove':
+Chess.m:83:17: warning: 'NSApplication' may not respond to '-undoMove:'
+   83 |                 [NSApp undoMove:NSApp];
+      |                 ^
+Chess.m:83:17: warning: (messages without a matching method signature will be assumed to return 'id' and accept '...' as arguments)
+Chess.m:90:17: warning: 'NSApplication' may not respond to '-makeMoveFrom::to::'
+   90 |                 [NSApp makeMoveFrom: r : c to: r2 : c2];
+      |                 ^
 Chess.m: In function '-[Chess renderColors:]':
 Chess.m:516:17: warning: passing argument 1 of 'getRed:green:blue:alpha:' from incompatible pointer type [-Wincompatible-pointer-types]
   516 |                 [white_color getRed:&red green:&green blue:&blue alpha:&alpha];
@@ -1036,26 +1076,7 @@
 Chess.m:781:5: note: in expansion of macro 'chess_debug'
   781 |     chess_debug(( @"<<< opponent move time %d move %@", move_time(), move ));
       |     ^~~~~~~~~~~
-ResponseMeter.m: In function '-[ResponseMeter drawRect:]':
-Chess_main.m: In function 'main':
-Chess_main.m:51:36: warning: passing argument 2 of 'NSApplicationMain' from incompatible pointer type [-Wincompatible-pointer-types]
-   51 |     return NSApplicationMain(argc, argv);
-      |                                    ^~~~
-      |                                    |
-      |                                    char **
-ResponseMeter.m:88:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
-   88 |     if( res_time = response_time() ) {
-      |         ^~~~~~~~
-ChessListener.cp: In member function 'bool CLMoveGenerator::TryMove(int, const CLCoord&, const CLCoord&)':
-ChessListener.cp:571:12: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
-  571 |         if (piece == PAWN) // Pawns move straight, capture diagonally
-      |            ^
 Chess.m: In function '-[Chess peekAndGetLeftMouseDownEvent]':
-In file included from /usr/include/aarch64-linux-gnu/GNUstep/AppKit/AppKit.h:57,
-                 from Chess_main.m:47:
-/usr/include/aarch64-linux-gnu/GNUstep/AppKit/NSApplication.h:776:42: note: expected 'const char **' but argument is of type 'char **'
-  776 | NSApplicationMain(int argc, const char **argv);
-      |                             ~~~~~~~~~~~~~^~~~
 Chess.m:803:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   803 |     if( event = [NSApp nextEventMatchingMask: NSLeftMouseDownMask untilDate: [NSDate date] inMode: NSEventTrackingRunLoopMode dequeue: NO] ) {
       |         ^~~~~
@@ -1072,20 +1093,6 @@
 Chess.m:878:17: note: in expansion of macro 'chess_debug'
   878 |                 chess_debug (( @"computer pawn becomes queen..." ));
       |                 ^~~~~~~~~~~
-Board.m: In function '-[Board mouseDown:]':
-Board.m:357:5: warning: 'NSApplication' may not respond to '-bothsides'
-  357 |     if ( [NSApp bothsides] ) {
-      |     ^~
-Board.m:357:5: warning: (messages without a matching method signature will be assumed to return 'id' and accept '...' as arguments)
-Board.m:360:5: warning: 'NSApplication' may not respond to '-finished'
-  360 |     else if( [NSApp finished] ) {
-      |     ^~~~
-Board.m:361:9: warning: 'NSApplication' may not respond to '-finishedAlert'
-  361 |         [NSApp finishedAlert];
-      |         ^
-Board.m:478:17: warning: 'NSApplication' may not respond to '-makeMoveFrom::to::'
-  478 |                 if( ! [NSApp makeMoveFrom: r : c to: r2 : c2] ) {
-      |                 ^~
 Chess.m: In function '-[Chess application:openFile:withType:]':
 Chess.m:65:96: warning: statement with no effect [-Wunused-value]
    65 | #define chess_debug(x) if (sCD || (!sCDInit++ && (sCD = getenv("CHESS_DEBUG")))) NSLog x; else 0
@@ -1151,6 +1158,35 @@
 Board3D.m:688:25: warning: 'NSApplication' may not respond to '-makeMoveFrom::to::'
   688 |                         if( ! [NSApp makeMoveFrom: r : c to: r2 : c2] ) {
       |                         ^~
+ResponseMeter.m: In function '-[ResponseMeter drawRect:]':
+ResponseMeter.m:88:9: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
+   88 |     if( res_time = response_time() ) {
+      |         ^~~~~~~~
+Board.m: In function '-[Board mouseDown:]':
+Chess_main.m: In function 'main':
+Board.m:357:5: warning: 'NSApplication' may not respond to '-bothsides'
+  357 |     if ( [NSApp bothsides] ) {
+      |     ^~
+Board.m:357:5: warning: (messages without a matching method signature will be assumed to return 'id' and accept '...' as arguments)
+Board.m:360:5: warning: 'NSApplication' may not respond to '-finished'
+  360 |     else if( [NSApp finished] ) {
+      |     ^~~~
+Board.m:361:9: warning: 'NSApplication' may not respond to '-finishedAlert'
+  361 |         [NSApp finishedAlert];
+      |         ^
+Chess_main.m:51:36: warning: passing argument 2 of 'NSApplicationMain' from incompatible pointer type [-Wincompatible-pointer-types]
+   51 |     return NSApplicationMain(argc, argv);
+      |                                    ^~~~
+      |                                    |
+      |                                    char **
+Board.m:478:17: warning: 'NSApplication' may not respond to '-makeMoveFrom::to::'
+  478 |                 if( ! [NSApp makeMoveFrom: r : c to: r2 : c2] ) {
+      |                 ^~
+In file included from /usr/include/aarch64-linux-gnu/GNUstep/AppKit/AppKit.h:57,
+                 from Chess_main.m:47:
+/usr/include/aarch64-linux-gnu/GNUstep/AppKit/NSApplication.h:776:42: note: expected 'const char **' but argument is of type 'char **'
+  776 | NSApplicationMain(int argc, const char **argv);
+      |                             ~~~~~~~~~~~~~^~~~
 In file included from gnuglue.m:53:
 gnuchess.h:112:9: warning: "HZ" redefined
   112 | #define HZ 60
@@ -1433,8 +1469,8 @@
    dh_gencontrol
    dh_md5sums
    dh_builddeb
-dpkg-deb: building package 'chess.app' in '../chess.app_2.8-6_arm64.deb'.
 dpkg-deb: building package 'chess.app-dbgsym' in '../chess.app-dbgsym_2.8-6_arm64.deb'.
+dpkg-deb: building package 'chess.app' in '../chess.app_2.8-6_arm64.deb'.
  dpkg-genbuildinfo --build=binary -O../chess.app_2.8-6_arm64.buildinfo
  dpkg-genchanges --build=binary -O../chess.app_2.8-6_arm64.changes
 dpkg-genchanges: info: binary-only upload (no source code included)
@@ -1442,12 +1478,14 @@
 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/2712322/tmp/hooks/B01_cleanup starting
+I: user script /srv/workspace/pbuilder/2712322/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/129615 and its subdirectories
-I: Current time: Mon Apr  6 06:37:49 -12 2026
-I: pbuilder-time-stamp: 1775500669
+I: removing directory /srv/workspace/pbuilder/2712322 and its subdirectories
+I: Current time: Wed Mar  5 02:16:02 +14 2025
+I: pbuilder-time-stamp: 1741090562