Patch originally from https://sources.debian.net/patches/erlang/1:20.0.1%2Bdfsg-2/man.patch/
by Francois-Denis Gonthier <neumann@lostwebsite.net>.

Patch description rewritten for Guix.

This patch allows access to the man page with the 'erl -man' command
(Erlang manual pages are placed to /gnu/store/..erlang../share/man/ hierarchy
as other man pages.)

--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -709,8 +709,10 @@
 			error("-man not supported on Windows");
 #else
 			argv[i] = "man";
-			erts_snprintf(tmpStr, sizeof(tmpStr), "%s/man", rootdir);
-			set_env("MANPATH", tmpStr);
+			/*
+			* Conform to erlang-manpages content.
+			*/
+			putenv(strsave("MANSECT=1:3:5:7"));
 			execvp("man", argv+i);
 			error("Could not execute the 'man' command.");
 #endif
ripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=554d5e1f47970f9197a92dd92e13ea8485c26892'>refs</a><a class='active' href='/guix/log/TODO'>log</a><a href='/guix/tree/TODO?id=554d5e1f47970f9197a92dd92e13ea8485c26892'>tree</a><a href='/guix/commit/TODO?id=554d5e1f47970f9197a92dd92e13ea8485c26892'>commit</a><a href='/guix/diff/TODO?id=554d5e1f47970f9197a92dd92e13ea8485c26892'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/TODO'>
<input type='hidden' name='id' value='554d5e1f47970f9197a92dd92e13ea8485c26892'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=554d5e1f47970f9197a92dd92e13ea8485c26892'>root</a>/<a href='/guix/log/TODO?id=554d5e1f47970f9197a92dd92e13ea8485c26892'>TODO</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/TODO?id=554d5e1f47970f9197a92dd92e13ea8485c26892&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-01-21 09:59:41 +0100'>2019-01-21</span></td><td><a href='/guix/commit/TODO?id=b93d2602f72dbbd9334a4f5c75b8721e1f2fa35a'>Update 'TODO'</a><span class='msg-avail'>...<span class='msg-tooltip'>* TODO (Installer): Add Pierre Neidhardt suggestions described here:
  https://lists.gnu.org/archive/html/guix-devel/2019-01/msg00305.html
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2019-01-17 14:11:15 +0100'>2019-01-17</span></td><td><a href='/guix/commit/TODO?id=11b68c90cd89288906c595d5c31a0413ed8a496f'>Update 'TODO'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* TODO (Installer): New section.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2016-09-01 14:57:03 +0200'>2016-09-01</span></td><td><a href='/guix/commit/TODO?id=e5cd149f681cc8d285da6c7638b70a43b333f337'>Update 'TODO'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* TODO: Remove items about guix challenge &amp; guix publish.

Signed-off-by: Vincent Legoll &lt;vincent.legoll@gmail.com&gt;
Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Vincent Legoll</td></tr>