Commands affecting Ruby dependencies not being run from Powershell?

Question

ruby gems

The gulp-hologram module was required.
Installed, I run the task from PowerShell, I get:

[15:29:46] Starting 'hologram'...
[15:29:46] 'hologram' errored after 19 ms
[15:29:46] Error in plugin 'gulp-hologram'

You need to have Hologram installed in your PATH for this task to work.

sudo gem install hologram

In environments, I already have a path to ruby C:\Ruby23-x64\bin;
. I try to run a task from the ruby ​​console, everything works.
How to make it work from PowerShell?