update README

As title

README.md

@@ -25,22 +25,19 @@ bytecode.
 * sphinx (for docs)
 * sphinx_rt_theme (for docs)
 
-You can create a conda env using the following:
-
-```
-$ conda env create -n numba-rvsdg python=3.12 python-graphviz pyyaml pytest sphinx sphinx_rtd_theme
-$ conda activate numba-rvsdg
-```
-
-If you have `make` and `conda` available, a common workflow could be:
+If you have `make` and `conda` available, a common setting up workflow could
+be:
 
 ```
 $ make conda-env                        # setup conda environment
 $ conda activate numba-rvsdg            # activate it
+$ make conda-install                    # install dependencies
 $ make                                  # lint, build and test the project
 ```
 
-Feel free to look at the `makefile` for low-level commands.
+Feel free to look at the
+[`makefile`](https://github.com/numba/numba-rvsdg/blob/main/makefile) for all
+development commands.
 
 ## references