extconf.rb in saber-1.2.2 vs extconf.rb in saber-1.2.3

@@ -1,11 +1,20 @@
 #!/usr/bin/env ruby
 require "fileutils"
 require "mkmf"
 
 bindir = File.expand_path("../bin", __FILE__)
-gem_home = Process.pid == 0 ? Gem.dir : Gem.user_dir
+
+gem_home = if Gem.dir.match(%~/(\.rvm|\.rbenv)/~)
+    Gem.dir
+  elsif Process.pid == 0
+    Gem.dir
+  else
+    Gem.user_dir
+  end
 dist_bindir = ENV["GEM_BINDIR"] || Gem.bindir(gem_home)
+
+p Gem.dir, Gem.user_dir
 
 FileUtils.install File.join(bindir, "saber-drb_add"), dist_bindir
 FileUtils.install File.join(bindir, "saber.bib"), dist_bindir
 FileUtils.install File.join(bindir, "saber.bb"), dist_bindir
 FileUtils.install File.join(bindir, "saber.stp"), dist_bindir