Merge pull request #345 from willfurnass/accidental_install_from_pypi

Docs: guard against accidentally installing from PyPI instead of Git clone

docs/source/install.rst

@@ -52,16 +52,21 @@ Installing MuMoT within a Conda environment
 
    .. code:: sh
 
-      source activate mumot-env    # on macOS/Linux
+      source activate mumot-env    # on macOS/Linux with older versions of conda
+      conda activate mumot-env    # on macOS/Linux with newer versions of conda
       activate mumot-env           # on Windows
 
 #. *Install* MuMoT and dependencies into this conda environment:
 
+
    .. code:: sh
 
       conda install graphviz
       python -m pip install path/to/clone/of/MuMoT/repository
 
+   NB if your clone of the MuMot repository is a subdirectory of the current directory,
+   make sure you run ``python3 -m pip install ./MuMoT`` instead of ``python3 -m pip install MuMoT``
+   (to ensure  MuMoT is installed from your Git clone and not :ref:`from PyPI<pypi_inst>`).
 
 .. _venv_inst:
 
@@ -111,6 +116,12 @@ Installing MuMoT within a VirtualEnv
       python3 -m pip install path/to/clone/of/MuMoT/repository
       jupyter nbextension enable --py widgetsnbextension --sys-prefix
 
+   NB if your clone of the MuMot repository is a subdirectory of the current directory,
+   make sure you run ``python3 -m pip install ./MuMoT`` instead of ``python3 -m pip install MuMoT``
+   (to ensure  MuMoT is installed from your Git clone and not :ref:`from PyPI<pypi_inst>`).
+
+.. _pypi_inst:
+
 Installing MuMoT from PyPI
 --------------------------