Npm error

[prabhjot-2]

while install the @mdslab/wstun, i hit the command npm i @mdslab/wstun following error is coming:
: npm error code 1
npm error path C:\gateway_code_18(18.20.4)_lts\cori-gateway\Services\gateway\node_modules@mdslab\wstun
npm error command failed
npm error command C:\WINDOWS\system32\cmd.exe /d /s /c ./scripts/postinst
npm error '.' is not recognized as an internal or external command,
npm error operable program or batch file.