--- sigscheme/doc/Makefile.in.orig	2018-07-12 14:16:06 UTC
+++ sigscheme/doc/Makefile.in
@@ -266,7 +266,7 @@ build_vendor = @build_vendor@
 builddir = @builddir@
 datadir = @datadir@
 datarootdir = @datarootdir@
-docdir = @docdir@
+docdir = $(prefix)/share/doc/uim/sigscheme
 dvidir = @dvidir@
 exec_prefix = @exec_prefix@
 host = @host@