--- Makefile.am.orig	2022-06-21 14:53:53 UTC
+++ Makefile.am
@@ -5,7 +5,7 @@ LIBDIR=@libdir@
 BINDIR=@bindir@
 INCDIR=@includedir@/espeak
 LIBDIR=@libdir@
-DATADIR=$(PREFIX)/share/espeak-ng-data
+DATADIR=%%DATADIR%%/espeak-ng-data
 VIMDIR=$(PREFIX)/share/vim
 
 pkgconfigdir = $(libdir)/pkgconfig