Best way to skip first and emit rest

[jacoobes]

i have some observables

ready$ 
buildModules$

I want to chain these observables so that ready$ is called first always, and buildModules$ calls after.
In other words, these are called sequentially, but the output of ready$ is ignored
I have this, and it works

ready$.pipe(
   switchMapTo(() => buildModules$)
)

But I feel like there could be a better way to tackle this.
What do you guys recommend?

[demensky]

In the example below, the subscription to buildModules$ will happen only after complete happens in ready$. Events from ready$ will be completely ignored.

concat(
  ready$.pipe(ignoreElements()),
  buildModules$,
)

[jacoobes]

thanks!