This is a problem with NPM and Nexus interworking

I tried set

npm config set registry https://nexus.--.com/npm-public/

and did this.

npm search express

but can't search module and error

500 Internal Server Error - GET https://nexus.--.com/npm-public/-/v1/search?~~~

Why that url's queryString prefix added?

This url is work well.

https://nexus.--.com/npm-public/search?~~~

How can i remove that "-/v1/" prefix?