title: AWS lambda function throws error even after providing all modules
body: <p>I want to convert .docx file to .txt and If .docx has tables I want to maintain them in good way in .txt file , so I am using pypandoc for this purpose .
  In my local this is working like charm.
  When I zip it with all dependencies and put it in s3 to run via aws lambda it fails with below error:</p>
  <blockquote>
  </blockquote>
  <p>No pandoc was found: either install pandoc and add it
  to your PATH or or call pypandoc.download_pandoc(...) or
  install pypandoc wheels with included pandoc</p>
  <blockquote>
  </blockquote>
  <p>My code is like :</p>
  <pre><code>import boto3
  import logging
  import pypandoc
  local_file_docx =  '/tmp/'+prefix+'german-de.docx'
  local_file_txt =  '/tmp/'+prefix+'german-de.txt'
  def lambda_handler(event, context):
      print(pypandoc.convert_file(local_file_docx, &quot;plain+simple_tables&quot;, format=&quot;docx&quot;, extra_args= 
      (), encoding='utf-8', outputfile=local_file_txt))
  </code></pre>
  <p>Any help . Aprreciated in advance</p>