diff --git a/webtty.js b/webtty.js
index cb31c1a..be823f7 100755
--- a/webtty.js
+++ b/webtty.js
@@ -7,14 +7,24 @@ var fs = require('fs');
 var child_process = require("child_process");
 
 var serveStaticRoot = "/home/elwin/hk/nodejs/rlg/s/";
+var ptyhelp = "/home/elwin/hk/nodejs/rlg/ptywreck/ptyhelperC";
 var sessions = {};
 
+var env_dontuse = {"TMUX": true, "TMUX_PANE": true};
+
 /* Constructor for TermSessions.  Note that it opens the terminal and 
  * adds itself to the sessions dict. 
  */
 function TermSession(sessid) {
+  var childenv = {};
+  for (var key in process.env) {
+    if (!(key in env_dontuse))
+      childenv[key] = process.env[key];
+  }
+  // Should setsid get set?
+  var spawnopts = {"env": childenv, "cwd": process.env["HOME"]};
   //var pterm = tty.open("/bin/bash");
-  this.child = child_process.spawn("./ptywreck/ptyhelperC", ["bash"]);
+  this.child = child_process.spawn(ptyhelp, ["bash"], spawnopts);
   var ss = this;
   /* Eventually we'll need to make sure the sessid isn't in use yet. */
   this.sessid = sessid;