[master] 372155993 fix a stupid mistake which I overlooked

[Nils Goroll]

commit 37215599397ba5df32712b2a45c1a0e299063d5d
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Tue Jul 28 13:13:11 2020 +0200

    fix a stupid mistake which I overlooked
    
    ... trying to understand the reason for failing builds.
    
    Apologies!

diff --git a/doc/sphinx/Makefile.am b/doc/sphinx/Makefile.am
index c5bcd9c22..14d0b9ad9 100644
--- a/doc/sphinx/Makefile.am
+++ b/doc/sphinx/Makefile.am
@@ -20,7 +20,7 @@ clean:
 
 # sphinx does not support include paths or anything comparable:
 # link source tree files for an out-of-tree build
-rstlinks = $(abs_builddir)/doc/sphinx/index.rst
+rstlinks = $(abs_builddir)/index.rst
 $(rstlinks):
 	s=`realpath $(srcdir)`; \
 	for f in `cd $$s && find . -name \*.rst \! -name \*.generated.rst -type f`; do \