Carthage installation error

[ghost]

Swift 2.3

Cartfile

github "xmartlabs/Eureka" ~> 1.7

Message

*** Building scheme "Eureka" in Eureka.xcworkspace
--- xcodebuild: WARNING: Unable to open project file '<MY_PROJECT>/Carthage/Checkouts/Eureka/Eureka.playground' in workspace '<MY_PROJECT>/Carthage/Checkouts/Eureka/Eureka.xcworkspace'.
** CLEAN FAILED **


The following build commands failed:
	Check dependencies
(1 failure)
** BUILD FAILED **


The following build commands failed:
	Check dependencies
(1 failure)
A shell task (/usr/bin/xcrun xcodebuild -workspace <MY_PROJECT>/Carthage/Checkouts/Eureka/Eureka.xcworkspace -scheme Eureka -configuration Release -sdk iphoneos ONLY_ACTIVE_ARCH=NO BITCODE_GENERATION_MODE=bitcode CODE_SIGNING_REQUIRED=NO CODE_SIGN_IDENTITY= CARTHAGE=YES clean build) failed with exit code 65:
--- xcodebuild: WARNING: Unable to open project file '<MY_PROJECT>/Carthage/Checkouts/Eureka/Eureka.playground' in workspace '<MY_PROJECT>/Carthage/Checkouts/Eureka/Eureka.xcworkspace'.
** CLEAN FAILED **


The following build commands failed:
	Check dependencies
(1 failure)
** BUILD FAILED **


The following build commands failed:
	Check dependencies
(1 failure)

Where <MY_PROJECT>is the path to my project!

More verbose log

Here some logs after verbose update:

“Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.

I already use Carthage for other libraries for this project so this may come from SwiftCharts project's configuration.

I found an issue related to this point on Carthage GitHub
And here is an interesting quote:

In Build Settings, each target should make sure it chooses "YES" or "NO" instead of unspecified for "Use Legacy Swift Language Version".

Related

I already have this kind of error with another library: ivnsch/SwiftCharts#191

Env

• Environment: Eureka 1.7
• Xcode 8.1
• Swift 2.3

[leonid-s-usov]

Hey, I am having the same issue with Xcode 8.2.1
Why was this closed? Is there a solution?