title: Install needed libraries for Weasyprint on pipenv (Windows environment)
body: <p>In order to start generating documents with Weasyprint I installed it on my Windows machine following these instructions:<br>
  <a href="https://weasyprint.readthedocs.io/en/stable/install.html#step-5-run-weasyprint" rel="nofollow noreferrer">https://weasyprint.readthedocs.io/en/stable/install.html#step-5-run-weasyprint</a></p>
  
  <p>On my computer it works but I have a Django project where I want to integrate this library and I use pipenv. <br>How to install the necessary libraries even in the virtual environment?<br>
  I tried setting the path for the pycairo package into the Pipfile like </p>
  
  <pre><code>pycairo= {path= "C:/Program Files/GTK3-Runtime Win64/bin/"}
  </code></pre>
  
  <p>but still it throws the error:</p>
  
  <pre><code>OSError: dlopen() failed to load a library: cairo / cairo-2 / cairo-gobject-2 / cairo.so.2
  </code></pre>
  
  <p>I have 64bit Windows machine and this is the Pipfile:</p>
  
  <pre><code>[[source]]
  name = "pypi"
  url = "https://pypi.org/simple"
  verify_ssl = true
  
  [dev-packages]
  pylint = "*"
  
  [packages]
  django = "*"
  mysql = "*"
  ipython = "*"
  django-webpack = "*"
  django-webpack-loader = "*"
  django-livereload-server = "*"
  pylint = "*"
  reportlab = "*"
  weasyprint = "*"
  django-weasyprint = "*"
  pycairo= {path= "C:/Program Files/GTK3-Runtime Win64/bin/"}
  cairocffi = "*"
  
  [requires]
  python_version = "3.7"
  </code></pre>