Unable to locate .sencha folder

(1) I use Ext JS 6.5 on macOS 10.12.5 .

(2) I am reading guideline at http://docs.sencha.com/extjs/6.5.0/guides/quick_start/going_to_production.html .

(3) Download https://github.com/sencha-extjs-examples/QuickStart/archive/master.zip

(4)unzip, rename directory QuickStart-master to QuickStart.

(5) Ext JS 6.5 (after unzip) put in /Users/donhuvy/Downloads/ext-6.5.0.

I run

sencha app install --framework=/Users/donhuvy/Downloads/ext-6.5.0

I see error:

➜  ~ pwd                                                              
/Users/donhuvy
➜  ~ cd /Users/donhuvy/Downloads/QuickStart
➜  QuickStart sencha app install --framework=/Users/donhuvy/Downloads/ext-6.5.0
Sencha Cmd v6.5.0.180
[INF] Using existing workspace at /Users/donhuvy/Downloads/QuickStart
[INF] Copying framework to /Users/donhuvy/Downloads/QuickStart/ext
[INF] Loading configuration for framework directory: /Users/donhuvy/Downloads/QuickStart/ext
[INF] Upgrading to Ext JS 6.x
[INF] Upgrading to sdk at /Users/donhuvy/Downloads/QuickStart/ext
[ERR] Unable to locate .sencha folder
[ERR] Please ensure this folder is a valid v3 ExtJS application
[ERR] com.sencha.exceptions.ExScript: com.sencha.exceptions.ExState: No .sencha directory found (anonymous#27)
   runAppUpgrade (anonymous:26)
   [anonymous] (anonymous:464)
   x_app_upgrade (anonymous:463)
➜  QuickStart sencha app install --framework=/Users/donhuvy/Downloads/ext-6.5.0
Sencha Cmd v6.5.0.180
[INF] Using existing workspace at /Users/donhuvy/Downloads/QuickStart

How to fix it? https://stackoverflow.com/questions/44731585/unable-to-locate-sencha-folder

sencha-extjs-examples / QuickStart

Unable to locate .sencha folder #5