Update README.rst (#3232)

* Update README.rst

* Commit suggested changes
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

* Commit suggested changes
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

README.rst

@@ -74,6 +74,10 @@ From source:
     # or, for OSX
     # MACOSX_DEPLOYMENT_TARGET=10.9 CC=clang CXX=clang++ python setup.py install
 
+
+In case building TorchVision from source fails, install the nightly version of PyTorch following 
+the linked guide on the  `contributing page <https://github.com/pytorch/vision/blob/master/CONTRIBUTING.md#development-installation>`_ and retry the install.
+
 By default, GPU support is built if CUDA is found and ``torch.cuda.is_available()`` is true.
 It's possible to force building GPU support by setting ``FORCE_CUDA=1`` environment variable,
 which is useful when building a docker image.