gurk-rs on OpenBSD does have an extra (sub)dependency: gmake. Without it, building the openssl-sys extension fails.

So, you should be able to install gurk-rs with:

$ doas pkg_add rust protobuf-c gmake
$ cargo install --git https://github.com/boxdot/gurk-rs gurk

There is currently an issue with an upstream package that requires gurk-rs to be ran using the full path, so that'd by default be:

$ /home/$USER/.cargo/bin/gurk

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