Using OneRNG hardware RNG can I get wireguard to use /dev/random

[peter garner]

Hi List, 

Platform: Raspberry Pi4B, Raspbian Buster 10.  This device dedicated to
wireguard. uname -a: Linux wireguard 4.19.118-v7l+ #1311 SMP Mon Apr 27
14:26:42 BST 2020 armv7l GNU/Linux. wg-quick is dated May 22 08:11
 
I've used my OneRNG v3.0 external device to recreate my SSH moduli and
am now looking to recreate my wireguard keys.

According to the Wireguard docs it uses /dev/urandom:
https://gist.github.com​/rmoriz​/58f1768218a4fbc4b318615bfb85111d
 
fd = open("/dev/urandom", O_RDONLY);
        if (fd < 0)
                return fd;
        ret = read(fd, out, len);
        close(fd);
 
The OneRNG utilises /dev/random though - is there any way I can get
wireguard to use /dev/random instead (without recompiling) ?