--- a/build/automationutils.py
+++ b/build/automationutils.py
@@ -129,25 +129,25 @@ def checkForCrashes(dumpDir, symbolsPath
 def getFullPath(directory, path):
   "Get an absolute path relative to 'directory'."
   return os.path.normpath(os.path.join(directory, os.path.expanduser(path)))
 
 def searchPath(directory, path):
   "Go one step beyond getFullPath and try the various folders in PATH"
   # Try looking in the current working directory first.
   newpath = getFullPath(directory, path)
-  if os.path.exists(newpath):
+  if os.path.isfile(newpath):
     return newpath
 
   # At this point we have to fail if a directory was given (to prevent cases
   # like './gdb' from matching '/usr/bin/./gdb').
   if not os.path.dirname(path):
     for dir in os.environ['PATH'].split(os.pathsep):
       newpath = os.path.join(dir, path)
-      if os.path.exists(newpath):
+      if os.path.isfile(newpath):
         return newpath
   return None
 
 def getDebuggerInfo(directory, debugger, debuggerArgs, debuggerInteractive = False):
 
   debuggerInfo = None
 
   if debugger: