$OpenBSD: patch-jruby-launcher_extconf_rb,v 1.3 2018/11/12 06:25:18 jeremy Exp $
Index: jruby-launcher/extconf.rb
--- jruby-launcher/extconf.rb.orig
+++ jruby-launcher/extconf.rb
@@ -1,5 +1,6 @@
 mf = File.read('Makefile')
 mf = mf.gsub(/^BINDIR\s*=.*$/, "BINDIR = #{RbConfig::CONFIG['bindir']}")
 mf = mf.gsub(/^PREFIX\s*=.*$/, "PREFIX = #{File.dirname(RbConfig::CONFIG['libdir'])}")
+mf = mf.gsub(/^INSTALLDIR\s*=.*$/, "INSTALLDIR = #{File.dirname(RbConfig::CONFIG['libdir'])}/lib/ruby/stdlib/rubygems/defaults")
 puts mf
 File.open('Makefile', 'wb') {|f| f << mf}
