swiftlint required but not a dependency

[utdrmac]

Trying to install TezosKit via carthage.

*** Building scheme "Base58Swift_macOS" in Base58Swift.xcodeproj
Build Failed
	Task failed with exit code 65:
	/usr/bin/xcrun xcodebuild -project /Users/jojo/Documents/CodeProjects/MyProj1/Carthage/Checkouts/Base58Swift/Base58Swift.xcodeproj -scheme Base58Swift_macOS -configuration Release -derivedDataPath /Users/jojo/Library/Caches/org.carthage.CarthageKit/DerivedData/12.3_12C33/Base58Swift/2.1.14 ONLY_ACTIVE_ARCH=NO CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES archive -archivePath /var/folders/76/q9_yh34j5wd23ksxl7b70ssm0000gn/T/Base58Swift SKIP_INSTALL=YES GCC_INSTRUMENT_PROGRAM_FLOW_ARCS=NO CLANG_ENABLE_CODE_COVERAGE=NO STRIP_INSTALLED_PRODUCT=NO

...
...
/Users/jojo/Library/Caches/org.carthage.CarthageKit/DerivedData/12.3_12C33/Base58Swift/2.1.14/Build/Intermediates.noindex/ArchiveIntermediates/Base58Swift_macOS/IntermediateBuildFilesPath/Base58Swift.build/Release/Base58Swift_macOS.build/Script-836D7AF445A97E1216598BA1.sh: line 2: swiftlint: command not found

This "swiftlint" seems to be some 3rd party tool? But none of the documentation for Base58Swift says I need to install it and it is not a dependency list anywhere