Changed docs for env generation

docs/dev_guide/dev_install.rst

@@ -14,13 +14,21 @@ the code folder (where the envs folder and pyproject.toml are located):
     $ git clone https://github.com/Deltares/hydromt_wflow.git
     $ cd hydromt_wflow
 
-Then, make and activate a new hydromt-wflow conda environment based on the envs/hydromt-wflow.yml
-file contained in the repository:
+The next step is to create an environment yaml.
+This is done by calling the `make_env.py` script from commandline:
+(This requires the presence of the package `tomli` or Python 3.11)
 
 .. code-block:: console
 
-    $ conda env create -f envs/hydromt-wflow.yml
-    $ conda activate hydromt-wflow
+    $ python make_env.py full
+
+The 'full' argument guarantees all the necessary tools!
+Now create the environment using conda and activate it:
+
+.. code-block:: console
+
+    $ conda env create -f environment.yml
+    $ conda activate hydromt_wflow
 
 If you wish to make changes in HydroMT-Wflow, you should make an editable install of the plugin.
 This can be done with:
@@ -35,3 +43,8 @@ This can be done through the following command from your base environment:
 .. code-block:: console
 
     $ conda clean -a
+
+It may also be advisable to clear pip's cache:
+
+.. code-block:: console
+    $ pip cache purge