Thanks-to: Chris Mayo
https://bugs.gentoo.org/533774

--- a/ogg123/Makefile.am
+++ b/ogg123/Makefile.am
@@ -19,7 +19,7 @@
 localedir = $(datadir)/locale
 DEFS = -DSYSCONFDIR=\"$(sysconfdir)\" -DLOCALEDIR=\"$(localedir)\" @DEFS@
 
-docdir = $(datadir)/doc/$(PACKAGE)-$(VERSION)
+docdir = @docdir@
 mandir = @MANDIR@
 
 bin_PROGRAMS = ogg123