https://bugs.gentoo.org/869662

--- vorbis-tools-1.4.2/ogg123/Makefile.am
+++ vorbis-tools-1.4.2/ogg123/Makefile.am
@@ -25,7 +25,6 @@
 localedir = $(datadir)/locale
 DEFS = -DSYSCONFDIR=\"$(sysconfdir)\" -DLOCALEDIR=\"$(localedir)\" @DEFS@
 
-docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)
 mandir = @MANDIR@
 
 bin_PROGRAMS = ogg123