let package = Package(
    name: "Test",
    products: [
        .executable(name: "test", targets: ["TestApp"])
    ],
    dependencies: [
        .package(url: "https://github.com/spotify/Mobius.swift.git", .branch("master"))
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
        .target(
            name: "Test",
            dependencies: [
                .product(name: "MobiusCore", package: "Mobius"),
                .product(name: "MobiusExtras", package: "Mobius")
            ]
        ),
        .target(
            name: "TestApp",
            dependencies: ["Test"]
        )
    ]
)

/Users/patrickb/Desktop/test: error: unknown package 'Mobius' in dependencies of target 'Test'

'Test' /Users/patrickb/Desktop/test: error: product dependency 'MobiusCore' in package 'Mobius.swift' not found
'Test' /Users/patrickb/Desktop/test: error: product dependency 'MobiusExtras' in package 'Mobius.swift' not found
warning: dependency 'Mobius' is not used by any target