These two test cases fail for us on i686.

See https://en.wikipedia.org/wiki/Year_2038_problem

--- netsurf-3.6/test/time.c
+++ netsurf-3.6/test/time.c
@@ -77,18 +77,10 @@
 		.expected = "Tue, 12 Jun 2001 12:12:12 GMT"
 	},
 	{
-		.test     = "Thu, 16 Jul 2207 12:45:12 GMT",
-		.expected = "Thu, 16 Jul 2207 12:45:12 GMT"
-	},
-	{
 		.test     = "Thu, 16 Aug 2007 19:45:12 GMT",
 		.expected = "Thu, 16 Aug 2007 19:45:12 GMT"
 	},
 	{
-		.test     = "Tue, 16 Sep 3456 00:45:12 GMT",
-		.expected = "Tue, 16 Sep 3456 00:45:12 GMT"
-	},
-	{
 		.test     = "Sun, 16 Oct 1988 19:45:59 GMT",
 		.expected = "Sun, 16 Oct 1988 19:45:59 GMT"
 	},
b2'/><select name='h' onchange='this.form.submit();'>
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<div class='path'>path: <a href='/guix/log/?id=26709726a80de2d22ab129ff49b38dc1600bf8b2'>root</a>/<a href='/guix/log/m4?id=26709726a80de2d22ab129ff49b38dc1600bf8b2'>m4</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/m4?id=26709726a80de2d22ab129ff49b38dc1600bf8b2&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-03-16 12:37:03 +0100'>2023-03-16</span></td><td><a href='/guix/commit/m4?id=8e3dfb3d6dfc0f19bd9a9f9b163f0f3d7dccc865'>build: Correct guix_system on musl libc distros.</a><span class='msg-avail'>...<span class='msg-tooltip'>* m4/guix.m4 (GUIX_SYSTEM_TYPE): Add linux-musl* case. This prevents
the macro from mis-parsing the host OS, which causes breakage when
building from source.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Antero Mejr</td></tr>
<tr><td><span title='2022-01-14 11:41:15 +0200'>2022-01-14</span></td><td><a href='/guix/commit/m4?id=03b45230d409c5f09e6ad18f23f313a13dbddb7d'>gnu: bootstrap: Add support for riscv64-linux.</a><span class='msg-avail'>...<span class='msg-tooltip'>On 7d93b21ab1c132990054372a9677c1639d54e631
    gnu: glibc-for-bootstrap: Update patch.

Run
    ./pre-inst-env guix build --target=riscv64-linux-gnu bootstrap-tarballs

Producing
    /gnu/store/4hdzva9i0wyyfbgj1lmqc1wkk644pv07-bootstrap-tarballs-0

With guix hash -rx
    1nj0fdgj08bbmfny01mp2blv7c3p2iciqh31zmf04ap5s7ygsqlp

* gnu/packages/bootstrap.scm (%bootstrap-executables): Add entries for
riscv64-linux.
(%bootstrap-guile-hash, %bootstrap-coreutils&amp;co, %bootstrap-binutils,
%bootstrap-glibc, %bootstrap-gcc): Add entry for riscv64-linux.
(raw-build-guile3): New procedure.
(make-raw-bag): Use raw-build-guile3 for riscv64-linux.
* guix/packages.scm (%supported-systems): Add riscv64-linux.
(%cuirass-supported-systems): Remove riscv64-linux.
* guix/utils.scm (target-64bit?): Add riscv64-linux.
* m4/guix.m4: Add riscv64-linux as a supported system.
* doc/guix.texi (GNU Distribution): Add riscv64-linux.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2021-12-14 18:33:49 +0200'>2021-12-14</span></td><td><a href='/guix/commit/m4?id=08d15a24c90e597f1656c3c0c3dbccf2022517de'>build: Adjust 'courage level' of different systems.</a><span class='msg-avail'>...<span class='msg-tooltip'>* m4/guix.m4 (GUIX_ASSERT_SUPPORTED_SYSTEM): Add i586-gnu. Move
powerpc-linux to unsupported but not needing courage. Add mips64el-linux
to unsupported.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2021-05-23 22:23:18 +0300'>2021-05-23</span></td><td><a href='/guix/commit/m4?id=cbdb7d4fea928febc105985c03b8fb5d6eda3d27'>gnu: bootstrap: Add support for powerpc-linux.</a><span class='msg-avail'>...<span class='msg-tooltip'>On 923bb70a1bff657125c3008f119a477e5cb57c2b
   gnu:glibc-for-bootstrap: Fix patch.

Run
    ./pre-inst-env guix build --target=powerpc-linux-gnu bootstrap-tarballs

Producing

    /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0

With guix hash -rx /gnu/store/dyj1wvayyp1ihaknkxniz1xamcf4yrhl-bootstrap-tarballs-0

    02xx2ydj28pwv3vflqffinpq1icj09gzi9icm8j4bwc4lca9irxn

* gnu/packages/bootstrap.scm (%bootstrap-executables): Add entries for
powerpc-linux.
(%bootstrap-guile-hash, %bootstrap-coreutils&amp;co, %bootstrap-binutils,
%bootstrap-glibc, %bootstrap-gcc): Add entry for powerpc-linux.
* gnu/packages.scm (%supported-systems): Add powerpc-linux.
(%hydra-supported-systems): Remove powerpc-linux.
* m4/guix.m4: Add powerpc-linux as a supported system.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2021-03-23 23:19:57 -0700'>2021-03-23</span></td><td><a href='/guix/commit/m4?id=a16eb6c5f97f136b678540ba61f12b2c08e43e13'>Add powerpc64le-linux as a supported Guix architecture.</a><span class='msg-avail'>...<span class='msg-tooltip'>This makes powerpc64le-linux a supported architecture for Guix, but not for
Guix System.

* Makefile.am (SUPPORTED_SYSTEMS): Add an entry for powerpc64le-linux.
* etc/guix-install.sh (chk_sys_arch): Same.
* guix/packages.scm (%supported-systems): Same.
* m4/guix.m4 (GUIX_ASSERT_SUPPORTED_SYSTEM): Same.
* tests/guix-build.sh (all_systems): Same.
</span></span></td><td>Chris Marusich</td></tr>
<tr><td><span title='2021-03-17 12:03:23 +0100'>2021-03-17</span></td><td><a href='/guix/commit/m4?id=62a091368df3bab499142d06f5114a73915c71f2'>maint: Check whether Guile-zlib is recent enough.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to a04aef2430645357d7796969d4b6453478ff8a3f.

* m4/guix.m4 (GUIX_CHECK_GUILE_ZLIB): New macro.
* configure.ac: Use it when checking for Guile-zlib.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-02-04 09:23:39 +0100'>2021-02-04</span></td><td><a href='/guix/commit/m4?id=55daad123e896c0e83361496cf49625289ee3571'>build: Add '--with-channel-commit' and related configure flags.</a><span class='msg-avail'>...<span class='msg-tooltip'>Partially fixes &lt;https://bugs.gnu.org/45896&gt;.

* m4/guix.m4 (GUIX_CHANNEL_METADATA): New macro.
* configure.ac: Use it.
* guix/config.scm.in (%channel-metadata): Adjust accordingly.
</span></span></td><td>Ludovic Courtès</td></tr>