HHVM and PHP version

When i enabled HHVM for alias domain (vhost) i can't set PHP version for website.
I edit nginx vhost file but it's not good solution. Is it a bug?

 

location @php {
try_files $uri =404;
include /etc/nginx/fastcgi_params;
fastcgi_pass unix:/var/run/hhvm/hhvm.web1.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_intercept_errors on;
error_page 500 501 502 503 = @phpfallback;
}

location @phpfallback {
try_files $uri =404;
include /etc/nginx/fastcgi_params;
fastcgi_pass unix:/var/lib/php7.0-fpm/web24.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_intercept_errors on;
}
​

It's ading phpfallback with
astcgi_pass unix:/var/lib/php7.0-fpm/web24.sock;

 

Not a bug. PHP version selection works only for PHP modes PHP-FPM and FastCGI. See the howto you followed to install the extra PHP versions.

 

How can i change php version that used this phpfallback rules then?

 

How can i change default php version then?

 

by using PHP-FPM instead of HHVM.