Builld failure in ubuntu

[gameofwar12]

while running "cargo install -f --path" command in ubuntu 19 the following error has failed the build process

---

error: enum variants on type aliases are experimental
--> /home/mr-war/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-rustls-0.10.1/src/lib.rs:260:9
|
260 | Self::Client(s)
| ^^^^^^^^^^^^

error: enum variants on type aliases are experimental
--> /home/mr-war/.cargo/registry/src/github.com-1ecc6299db9ec823/tokio-rustls-0.10.1/src/lib.rs:266:9
|
266 | Self::Server(s)
| ^^^^^^^^^^^^

error: aborting due to 2 previous errors

error: Could not compile tokio-rustls.
warning: build failed, waiting for other jobs to finish...
error: failed to compile sn0int v0.13.0 (/home/mr-war/BatCave/sn0int-master), intermediate artifacts can be found at /home/mr-war/BatCave/sn0int-master/target

Caused by:
build failed

[kpcyrd]

Hello!

Your compiler is probably too old, we recommend installing it from https://rustup.rs/ or using the docker image.

[gameofwar12]

@kpcyrd Thanks for info