> cargo:warning=Could not find directory of OpenSSL installation, and this `-sys` crate cannot proceed without this knowledge. If OpenSSL is installed and this crate had trouble finding it, you can set the `OPENSSL_DIR` environment variable for the compilation process. See stderr section below for further information.
>
> --- stderr
>
>
> Could not find directory of OpenSSL installation, and this `-sys` crate cannot
> proceed without this knowledge. If OpenSSL is installed and this crate had
> trouble finding it, you can set the `OPENSSL_DIR` environment variable for the
> compilation process.
>
> Make sure you also have the development packages of openssl installed.
> For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.
>
> If you're in a situation where you think the directory *should* be found
> automatically, please open a bug at https://github.com/rust-openssl/rust-openssl
> and include information about your system as well as this message.
>
> $HOST = x86_64-unknown-linux-gnu
> $TARGET = x86_64-unknown-linux-gnu
> openssl-sys = 0.9.111
>
>
> warning: build failed, waiting for other jobs to finish...
The current flake.nix gives the following error during compilation :