net.Dialer , os.Rename undefined

[cnn-rnn]

I am getting

type net.Dialer has no field or method Dial

and

undefined: os.Rename

when trying

tinygo build -target wasm

What does this mean, and how to fix it?

[cnn-rnn]

OK, I see that it is not implemented as per
https://github.com/tinygo-org/tinygo/blob/release/src/net/dial.go

What is the best way to implement it, for a specific project?