sencha app build production - just hangs without any indication

I'm trying to build my project, which works perfectly fine in its' unbuilt state.

Here is the output of the build command, at the last line it just hangs without any signs of life:

Code:

Sencha Cmd v4.0.4.84
[INF]
[INF] init-plugin:
[INF]
[INF] cmd-root-plugin.init-properties:
[INF]
[INF] init-properties:
[INF]
[INF] init-sencha-command:
[INF]
[INF] init:
[INF]
[INF] app-build-impl:
[INF]
[INF] -before-init-local:
[INF]
[INF] -init-local:
[INF]
[INF] -after-init-local:
[INF]
[INF] init-local:
[INF]
[INF] find-cmd-in-path:
[INF]
[INF] find-cmd-in-environment:
[INF]
[INF] find-cmd-in-shell:
[INF]
[INF] init-cmd:
[INF]      [echo] Using Sencha Cmd from /root/bin/Sencha/Cmd/4.0.4.84 for /var/www/vhosts/http://ift.tt/1mwFhyj
[INF]
[INF] -before-init:
[INF]
[INF] -init:
[INF] Initializing Sencha Cmd ant environment
[INF] Adding antlib taskdef for com/sencha/command/compass/ant/antlib.xml
[INF]
[INF] -after-init:
[INF]
[INF] -before-init-defaults:
[INF]
[INF] -init-defaults:
[INF]
[INF] -after-init-defaults:
[INF]
[INF] -init-compiler:
[INF]
[INF] init:
[INF]
[INF] -before-build:
[INF]
[INF] refresh:
[INF]
[INF] -before-refresh:
[INF]
[INF] -init:
[INF]
[INF] -init-compiler:
[INF]
[INF] -detect-app-build-properties:
[INF] Loading app json manifest...
[INF] Loading classpath entry /var/www/vhosts/http://ift.tt/1ppfRr4
[INF] Loading classpath entry /var/www/vhosts/http://ift.tt/1mwFhyl
[INF] Loading classpath entry /var/www/vhosts/http://ift.tt/1ppfRr6
[INF] Loading classpath entry /var/www/vhosts/http://ift.tt/1ppfRr8
[INF] Loading classpath entry /var/www/vhosts/http://ift.tt/1mwFhyt