The file $(top_srcdir)/gtk-doc.make doesn't exist, so don't include it.

--- a/doc/Makefile.in	2007-04-08 20:17:25.000000000 +0200
+++ b/doc/Makefile.in	2014-09-06 23:19:41.413397662 +0200
@@ -240,9 +240,6 @@
 distclean-generic clean-generic maintainer-clean-generic clean \
 mostlyclean distclean maintainer-clean
 
-
-include $(top_srcdir)/gtk-doc.make
-
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT:
 : <a href='/guix/'>guix</a></td><td class='form'><form method='get'>
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<div class='path'>path: <a href='/guix/log/?id=3f2d2236cfed6570e2c449bb51916e2390377c5e'>root</a>/<a href='/guix/log/gnu?id=3f2d2236cfed6570e2c449bb51916e2390377c5e'>gnu</a>/<a href='/guix/log/gnu/artwork.scm?id=3f2d2236cfed6570e2c449bb51916e2390377c5e'>artwork.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/artwork.scm?id=3f2d2236cfed6570e2c449bb51916e2390377c5e&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-06-10 23:11:07 +0200'>2019-06-10</span></td><td><a href='/guix/commit/gnu/artwork.scm?id=226a3605d6cabeb71247a732a99d625c9cfafa74'>artwork: Update snapshot to 2f2fe74.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/artwork.scm (%artwork-repository): Update to 2f2fe74.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Diego Nicola Barbato</td></tr>
<tr><td><span title='2019-03-05 23:08:53 +0100'>2019-03-05</span></td><td><a href='/guix/commit/gnu/artwork.scm?id=5387971a9ecf511e1dbbac992af3808437e58d56'>artwork: Update snapshot to b975164.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/artwork.scm (%artwork-repository): Update to b975164.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-02-10 23:25:01 +0100'>2019-02-10</span></td><td><a href='/guix/commit/gnu/artwork.scm?id=5e6a5aeebd7b735e5d5f2eed496cc1c7e8a5b4c9'>artwork: Update snapshot to e951905.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/artwork.scm (%artwork-repository): Update to e951905.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-05 00:08:47 +0100'>2018-11-05</span></td><td><a href='/guix/commit/gnu/artwork.scm?id=688d1a01e45eb1277a6337987bfd53f3fe3caaec'>artwork: Clone over HTTPS.</a><span class='msg-avail'>...<span class='msg-tooltip'>Suggested by Leo Famulari &lt;leo@famulari.name&gt;
at &lt;https://lists.gnu.org/archive/html/help-guix/2018-11/msg00039.html&gt;.

* gnu/artwork.scm (%artwork-repository): Switch to HTTPS URL.
</span></span></td><td>Ludovic Courtès</td></tr>
'2024-07-18 10:44:58 +0800'>2024-07-18</span></td><td><a href='/guix/commit/gnu/packages/polkit.scm?id=ea812cf80c7d7a16a861806f95fba0ebe690550c'>gnu: Add polkit-qt6.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/polkit.scm (polkit-qt6): New variable.

Change-Id: Ifc78e3c94ecb38c6edc9b3e1a6dde90729ce8128
</span></span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-07-18 10:44:58 +0800'>2024-07-18</span></td><td><a href='/guix/commit/gnu/packages/polkit.scm?id=cc753336251ac46db2f6c89ec6c840e3267800d4'>gnu: polkit-qt: Update to 0.200.0.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/polkit.scm (polkit-qt): Update to 0.200.0.
[propagated-inputs]: Remove it.
[inputs]: Add qtbase-5.
[arguments]&lt;#:configure-flags&gt;: Update.
[properties]: Set upstream-name.

Change-Id: Ibb33a7b0ea627b15062c013c233778154cdbf357
</span></span></td><td>Zheng Junjie</td></tr>