Update README.md

README.md

@@ -60,10 +60,22 @@ Depending on the active options, these boundaries can be post-processed  (e.g, m
 
 ## Install SpeechBrain
 
-First of all, please install SpeechBrain with the following command:
+First of all, currently you need to install SpeechBrain from the source:
 
+1. Clone SpeechBrain:
+
+```bash
+git clone https://github.com/speechbrain/speechbrain/
 ```
-pip install speechbrain
+
+2. Install it:
+
+```
+cd speechbrain
+
+pip install -r requirements.txt
+
+pip install -e .
 ```
 
 Please notice that we encourage you to read our tutorials and learn more about