TrueNas 13.1 + SoftEther

Good morning.
I installed TrueNas 13.1. I wanted to install SoftEther for FreeBSD. Steps in installation (Alternative to OpenVPN: SoftEther VPN | TrueNAS Community)
pkg update (maybe optional)
pkg upgrade (maybe optional)
pkg install wget
pkg install lang/gcc
After the make command I received the following message:

"/usr/local/bin/ld: cannot find /usr/lib/libc_nonshared.a
collect2: error: ld returned 1 exit status
**** Error code 1*
make[1]: stopped in /var/tmp/vpnserver"

Truenas is an appliance os and it’s not recommended or supported to install additional packages on the base os. You can try to run the service in a bsd jail.