Could Not Successfully Spawn Process

[JimLynchCodes]

When I create a new project, run cargo add ispell, and and the example code it doesn't work for me...

extern crate ispell;
use ispell::SpellLauncher;

fn main() {
    let mut checker = SpellLauncher::new()
        .aspell()
        .dictionary("en_GB")
        .launch()
        .unwrap();
    let errors = checker.check("A simpel test to see if it detetcs typing errors").unwrap();
    for e in errors {
        println!("'{}' (pos: {}) is misspelled!", &e.misspelled, e.position);
        if !e.suggestions.is_empty() {
            println!("Maybe you meant '{}'?", &e.suggestions[0]);
        }
    }
}

The docs say this should print:

'simpel' (pos: 2) is misspelled!
Maybe you meant 'simple'?
'detetcs' (pos: 27) is misspelled!
Maybe you meant 'dietetics'?

But instead I see this:

   Compiling ispell v0.3.1
   Compiling derf v0.1.0 (/Users/jim/trash/not-spell/derf)
    Finished dev [unoptimized + debuginfo] target(s) in 0.66s
     Running `target/debug/derf`
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Error { msg: "could not successfully spawn process 'aspell': No such file or directory (os error 2)", variant: Process }', src/main.rs:9:10
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Strange, right? Is this a regression in the library? Am I just doing something wrong here?

rustc --version
rustc 1.68.0 (2c8cc3432 2023-03-06)

cargo --version
cargo 1.68.0 (115f34552 2023-02-26)

mac os v12.4 (21F79)