* The 2022-02-10 nightly can't build some deps

There's a sig that returns `impl IntoIterator<Item = (&'static str, OsString)>` and an Option is being retured but it's incorrectly not allowing a `?` in the method.

* removing duplicate test

* [ci] add job cargo-check-nixos

* add dummy variables nix check

* fix check-dependent jobs

* fix check-dependent-project template

Co-authored-by: alvicsam <[email protected]>