vapor update fails

[j4nos]

When adding below line to Package.swift, vapor update will fail. Why?

.Package(url: "https://github.com/OpenKitten/Cheetah.git", majorVersion: 1)

Kukodas-MacBook-Pro:hello kukodajanos$ vapor update
Updating [ • ]
Error: backgroundExecute(code: 1, error: "error: terminated(128): git -C '/Users/kukodajanos/Workspace L/vapor/hello/.build/repositories/KittenCore.git--4606738124728250479' remote update -p\n", output: "Updating https://github.com/vapor/fluent-provider.git\nUpdating https://github.com/OpenKitten/Cheetah.git\nUpdating https://github.com/vapor/vapor.git\nUpdating https://github.com/OpenKitten/MongoKitten.git\nUpdating https://github.com/vapor/console.git\nUpdating https://github.com/vapor/crypto.git\nUpdating https://github.com/vapor/core.git\nUpdating https://github.com/vapor/bcrypt.git\nUpdating https://github.com/vapor/multipart.git\nUpdating https://github.com/vapor/node.git\nUpdating https://github.com/vapor/json.git\nUpdating https://github.com/vapor/engine.git\nUpdating https://github.com/vapor/routing.git\nUpdating https://github.com/vapor/random.git\nUpdating https://github.com/vapor/bits.git\nUpdating https://github.com/vapor/debugging.git\nUpdating https://github.com/vapor/ctls.git\nUpdating https://github.com/vapor/tls.git\nUpdating https://github.com/vapor/sockets.git\nUpdating https://github.com/vapor/fluent.git\nUpdating https://github.com/vapor/sqlite.git\nUpdating https://github.com/OpenKitten/CryptoKitten.git\nUpdating https://github.com/OpenKitten/BSON.git\nUpdating https://github.com/OpenKitten/Schrodinger.git\nUpdating https://github.com/OpenKitten/KittenCore.git\n")

[Joannis]

What version of MongoKitten are you running?

[j4nos]

I have this line: .Package(url: "https://github.com/OpenKitten/MongoKitten.git", majorVersion: 4)