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
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<tr><td><span title='2024-03-12 14:07:28 +0100'>2024-03-12</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=ff1251de0bc327ec478fc66a562430fbf35aef42'>daemon: Address shortcoming in previous security fix for CVE-2024-27297.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-03-11 22:12:34 +0100'>2024-03-11</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=8f4ffb3fae133bb21d7991e97c2f19a7108b1143'>daemon: Protect against FD escape when building fixed-output derivations (CVE...</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-12-17 01:00:00 +0100'>2023-12-17</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=892ec53b7eedf998afa149b9cdd169f0cab8f41d'>daemon: Fix my own whitespace errors.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-12-10 01:00:00 +0100'>2023-12-10</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=d993ed43b2bae8717437aa27d9d33fd223a6411f'>daemon: Sacrifice builders on OOM.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-12-04 22:26:36 +0100'>2023-12-04</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=d83d4488da5c3bb65867bffa2b8587a7c7b056cc'>daemon: Simplify “empty status” substitute error message.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-18 01:16:47 +0100'>2022-12-18</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=2d4d26769d6a3be1b21302b0bb2bd099fd55ccf8'>daemon: Make "opening file" error messages distinguishable.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-06-05 02:00:00 +0200'>2022-06-05</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=0ace58b99c7292dd962bcd244f274f8033a7fce4'>daemon: Quote consistently within a string.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-05-29 02:00:00 +0200'>2022-05-29</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=82b06436b4b563a85e70f3fcc610959482f08e91'>daemon: Clarify ‘--check’ error when outputs are missing.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-05-18 22:29:55 +0200'>2022-05-18</span></td><td><a href='/guix/commit/nix/libstore/build.cc?id=32916e04f7e1729b7ea5ab768607eb08183c015d'>daemon: runChild() is forbidden to talk during environment set up</a><span class='msg-avail'>...</span></td><td>yarl-baudig@mailoo.org</td></tr>