`sudo pkgm install` doesn't work

pkgx version : 2.7.0
pkgm version : 0.11.1
OS : WSL 2, Ubutun 20.04.6

`pkgm install` without `sudo` works, but with `sudo` I have this error message:
```
$ sudo pkgm install node
sudo: unable to execute /root/.pkgx/pkgx.sh/v2.7.0/bin/pkgx: Permission denied
```

But I can run this
```
$ sudo /root/.pkgx/pkgx.sh/v2.7.0/bin/pkgx -v
pkgx 2.7.0
```
