--- geos-3.8.1/macros/ruby.m4.orig	2019-09-18 23:38:19.000000000 +0200
+++ geos-3.8.1/macros/ruby.m4	2020-11-08 15:38:19.929621492 +0100
@@ -41,7 +41,7 @@
 		RUBY_ARCH_LIB_DIR=`$RUBY -rrbconfig -e 'puts RbConfig::CONFIG[["archlibdir"]] || Config::CONFIG[["archlibdir"]]'`
 
 		dnl Get Ruby extensions directory
-		RUBY_EXTENSION_DIR=`$RUBY -rrbconfig -e 'puts RbConfig::CONFIG[["sitearchdir"]] || Config::CONFIG[["sitearchdir"]]'`
+		RUBY_EXTENSION_DIR=`$RUBY -rrbconfig -e 'puts RbConfig::CONFIG[["vendorarchdir"]] || Config::CONFIG[["vendorarchdir"]]'`
 
 		dnl Get Ruby shared library name, this does not include the lib prefix or extension name
 		RUBY_SO_NAME=`$RUBY -rrbconfig -e 'puts RbConfig::CONFIG[["RUBY_SO_NAME"]] || Config::CONFIG[["RUBY_SO_NAME"]]'`