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
zko-scripts'>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>
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<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>refs</a><a class='active' href='/guix/log/etc/git'>log</a><a href='/guix/tree/etc/git?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>tree</a><a href='/guix/commit/etc/git?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>commit</a><a href='/guix/diff/etc/git?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/git'>
<input type='hidden' name='id' value='25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'/><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>
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<div class='path'>path: <a href='/guix/log/?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>root</a>/<a href='/guix/log/etc?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>etc</a>/<a href='/guix/log/etc/git?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c'>git</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/etc/git?id=25623647e9c6f5cafea902ac3d8d6d7ac03c0b3c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2017-02-08 03:42:08 +0100'>2017-02-08</span></td><td><a href='/guix/commit/etc/git?id=f0d0c5bb188455e0b82ee3089ba103ef71877c87'>etc: The pre-push hook says which commits failed the signature check.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2017-01-04 16:27:20 -0500'>2017-01-04</span></td><td><a href='/guix/commit/etc/git?id=69355e1283d300a663fb639ec426f10f3feb404b'>doc: Add a Git hook that verifies signatures before pushing.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>