ROMAN_HUNDREDS, ROMAN_TENS and ROMAN_ONES seem to use syntax, that is not
recognized (any longer?) by flex, so let's expand their definitions.

Index: spl-1.2.1/include/roman_numbers.metaflex
===================================================================
--- spl-1.2.1.orig/include/roman_numbers.metaflex
+++ spl-1.2.1/include/roman_numbers.metaflex
@@ -1,5 +1,5 @@
 ROMAN_THOUSANDS m+
-ROMAN_HUNDREDS  (c(d|m)|dc{0,3}|c{1,3})
-ROMAN_TENS      (x(l|c)|lx{0,3}|x{1,3})
-ROMAN_ONES      (i(v|x)|vi{0,3}|i{1,3})
+ROMAN_HUNDREDS  (c(d|m|c?c?)|dc?c?c?)
+ROMAN_TENS      (x(l|c|x?x?)|lx?x?x?)
+ROMAN_ONES      (i(v|x|i?i?)|vi?i?i?)
 ROMAN_NUMBER    {ROMAN_ONES}|{ROMAN_TENS}{ROMAN_ONES}?|{ROMAN_HUNDREDS}{ROMAN_TENS}?{ROMAN_ONES}?|{ROMAN_THOUSANDS}{ROMAN_HUNDREDS}?{ROMAN_TENS}?{ROMAN_ONES}?
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<div class='path'>path: <a href='/guix/log/?id=4e60d5dfb40ba604db114384469b8ebb2014efe3'>root</a>/<a href='/guix/log/gnu?id=4e60d5dfb40ba604db114384469b8ebb2014efe3'>gnu</a>/<a href='/guix/log/gnu/installer?id=4e60d5dfb40ba604db114384469b8ebb2014efe3'>installer</a>/<a href='/guix/log/gnu/installer/newt?id=4e60d5dfb40ba604db114384469b8ebb2014efe3'>newt</a>/<a href='/guix/log/gnu/installer/newt/partition.scm?id=4e60d5dfb40ba604db114384469b8ebb2014efe3'>partition.scm</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/gnu/installer/newt/partition.scm?id=4e60d5dfb40ba604db114384469b8ebb2014efe3&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-10-20 17:28:11 +0200'>2022-10-20</span></td><td><a href='/guix/commit/gnu/installer/newt/partition.scm?id=00ff6f7c399670a76efffb91276dea2633cc130c'>installer: Add a missing confirmation page before formatting.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a follow-up of: &lt;https://issues.guix.gnu.org/57232&gt;

* gnu/installer/newt/partition.scm (run-label-page): Add a confirmation page
when dealing with an EFI installation.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-10-13 10:48:08 +0200'>2022-10-13</span></td><td><a href='/guix/commit/gnu/installer/newt/partition.scm?id=91d817cc17fad5bfcba6ea3406b1275e8695f658'>installer: partition: Add a confirmation page before formatting.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes: &lt;https://issues.guix.gnu.org/57232&gt;.

* gnu/installer/newt/partition.scm (run-label-confirmation-page): New
procedure.
(run-label-page): Call the above procedure before proceeding.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-09-22 16:00:44 +0200'>2022-09-22</span></td><td><a href='/guix/commit/gnu/installer/newt/partition.scm?id=d77612a91b2bf9955e2e538ca59a74dbe2e1a7d5'>installer: Return partitions with crypt password as step result.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/newt/partition.scm (run-partitioning-page): Do it.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2022-09-22 16:00:29 +0200'>2022-09-22</span></td><td><a href='/guix/commit/gnu/installer/newt/partition.scm?id=4814ec284f8a2870e6457c05f414ad31df4e3f57'>installer: Move &lt;secret&gt; to utils and use it for crypt passwords.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/installer/user.scm (&lt;secret&gt;, secret?, make-secret, secret-content): Move
to utils.scm.
* gnu/installer/utils.scm (&lt;secret&gt;, secret?, make-secret, secret-content):
Moved from user.scm.
* gnu/installer/newt/partition.scm (prompt-luks-passwords): Make password a
&lt;secret&gt;.
* gnu/installer/parted.scm (luks-format-and-open): Unwrap secret.

Signed-off-by: Mathieu Othacehe &lt;othacehe@gnu.org&gt;
</span></span></td><td>Josselin Poiret</td></tr>