Hacking Homebrew Misc How do I create a TCP server?

[LawnMeower]

Hey folks,
I've been trying to make a TCP server based on instructions provided by the OpenBSD documentation and noexs repo.
Sadly the function socket() always returns -1. errno stays 0.

    sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    
    if(sockfd < 0)
    {
        printf("socket creation failed. sockfd = %d\n", sockfd);
        printf("errno: %d", errno);
    }

I thought I might need to enable some extra permissions or something so I checked up the noexs repo and found a JSON configuration there, copied, and adjusted it. Now make gives me the following errors:

Failed to get system_resource_size (field not present).
Failed to get is_64_bit (field not present).
Failed to parse descriptor json!

I'd be grateful for any help!