src/parser/parseSync.js in prettier-1.5.5 vs src/parser/parseSync.js in prettier-1.6.0

@@ -133,18 +133,20 @@
 
   // We need special handling in case the user's version of nc doesn't support
   // using unix sockets.
   if (
     stderr.includes("invalid option -- U") ||
+    stderr.includes("invalid option -- 'u'") ||
     stderr.includes("Protocol not supported")
   ) {
     throw new Error(`
-      @prettier/plugin-ruby uses netcat to communicate over unix sockets between
-      the node.js process running prettier and an underlying Ruby process used
-      for parsing. Unfortunately the version of netcat that you have installed
-      does not support unix sockets. To solve this either uninstall the version
-      of netcat that you're using and use a different implementation, or change
-      the value of the rubyNetcatCommand option in your prettier configuration.
+      @prettier/plugin-ruby uses unix sockets to communicate between the node.js
+      process running prettier and an underlying Ruby process used for parsing.
+      Unfortunately the command that it tried to use to do that
+      (${netcat.command}) does not support unix sockets. To solve this either
+      uninstall the version of ${netcat.command} that you're using and use a
+      different implementation, or change the value of the rubyNetcatCommand
+      option in your prettier configuration.
     `);
   }
 
   // If we didn't receive anything over stdout or we have a bad exit status,
   // then throw whatever we can.