somewhy fallback [1] no longer works
set one in linux/platform

[1] https://github.com/opscode/ohai/blob/7.4.0/lib/ohai/plugins/platform.rb#L26

--- ohai-7.4.0/lib/ohai/plugins/linux/platform.rb~	2014-09-06 07:18:08.000000000 +0300
+++ ohai-7.4.0/lib/ohai/plugins/linux/platform.rb	2014-11-14 14:04:37.000000000 +0200
@@ -121,6 +121,8 @@
       platform_family "arch"
     when /exherbo/
       platform_family "exherbo"
+    when /pld/
+      platform_family "pld"
     end
   end
 end