Ability to run shonkwrap automatically on package install

[kopach]

I would like to automate process of execution of shonkwrap. Is there any way to run shonkwrap automatically on package install? I've tried to add "postinstall": "shonkwrap" script as well as "postshrinkwrap": "shonkwrap" but both doesn't work correctly for me. In first case - npm's shrinkwrap is executed after shonkwrap, so effect of shonkwrap isn't visible after all. In second case - npm is falling into the loop as looks like shonkwrap internally executes shrinkwrap which executes postshrinkwrap and so on.

Would it be possible to add, for example, some flag, that would prevent shrinkwrap command from being executed internally? If I do have npm-shrinkwrap.json file in project root directory - every npm install will trigger npm shrinkwrap anyway :)