ruby: fixed by using $arch_machine while constructing the path for fixing 'rbconfig.rb'

ruby/ruby/ruby.conf

@@ -33,13 +33,12 @@ var_append makeinstopt ' ' 'install-doc'
 
 pkg_ruby_postmake() {
 	local ruby_ver="$(echo $ver | cut -d '.' -f-2)"
-	local platform="$(echo $arch | arch2uname)"
 
 	if pkginstalled linux-header; then
 		local os="linux"
 	fi
 
 	# fixup rbconfig.rb (otherwise the path of our install wrapper leaks in)
-	sed -i -e "s,\(CONFIG\[\"INSTALL\"\] =\).*,\1 '/usr/bin/install -c'," "$root$libdir/ruby/$ruby_ver/$platform-$os/rbconfig.rb"
+	sed -i -e "s,\(CONFIG\[\"INSTALL\"\] =\).*,\1 '/usr/bin/install -c'," "$root$libdir/ruby/$ruby_ver/$arch_machine-$os/rbconfig.rb"
 }
 hook_add postmake 5 'pkg_ruby_postmake'