Couldn't get it work until I changed sh to bash

[wvovaw]

I think you should change the shebangs in preview and cleaner

1c1
< #!/usr/bin/env sh
---
> #!/usr/bin/env bash

Because your script supposed to be executed in bash, and sh by default just links to the default user shell, that eventually not run the scripts.

[thimc]

Issue solved in commit 3de47035a2e5361f6f4185e30a70db8aae4142ad