Use new generators in instructions. Closes phoenixframework#2124

README.md

@@ -19,14 +19,14 @@ We appreciate any contribution to Phoenix. Check our [CODE_OF_CONDUCT.md](CODE_O
 
 ### Generating a Phoenix project from unreleased versions
 
-In order to create a new project using the latest Phoenix source installer (the `phoenix.new` Mix task) you will need to ensure two things.
+In order to create a new project using the latest Phoenix source installer (the `phx.new` Mix task) you will need to ensure two things.
 
-1. Remove any previously installed `phoenix_new` archives so that Mix will pick up the local source code. This can be done with `mix archive.uninstall phoenix_new.ez` or by simply deleting the file, which is usually in `~/.mix/archives/`.
+1. Remove any previously installed `phx_new` archives so that Mix will pick up the local source code. This can be done with `mix archive.uninstall phx_new.ez` or by simply deleting the file, which is usually in `~/.mix/archives/`.
 2. Run the command from within the `installer` directory and provide a subdirectory within the installer to generate your dev project. The command below will create a new project using your current Phoenix checkout, thanks to the `--dev` flag.
 
 ```bash
 $ cd installer
-$ mix phoenix.new dev_app --dev
+$ mix phx.new dev_app --dev
 ```
 
 This will produce a new project that has `:phoenix` configured as a relative dependency: