--- tools/sane-config.in.orig	2020-02-02 11:58:09 UTC
+++ tools/sane-config.in
@@ -11,7 +11,7 @@ prefix="@prefix@"
 exec_prefix="@exec_prefix@"
 
 # using our installed *.pc only - neither default nor user paths
-export PKG_CONFIG_LIBDIR="@libdir@/pkgconfig"
+export PKG_CONFIG_LIBDIR="@prefix@/libdata/pkgconfig"
 export PKG_CONFIG_PATH=""
 
 pkgconfig_package=sane-backends