Accio: accio fails to install dependencies

I thought I give accio a try for a macOS project. I’ve created a simple Package.swift file:

// swift-tools-version:5.0
import PackageDescription

let package = Package(
    name: "Demo",
    products: [],
    dependencies: [
        .package(url: "https://github.com/filom/ASN1Decoder.git", .upToNextMajor(from: "1.3.1"))
    ],
    targets: [
        .target(
            name: "Demo",
            dependencies: [
                "ASN1Decoder",
            ],
            path: "Demo"
        ),
    ]
)

When trying to build the dependency

$ accio update
...
✨  Building library ASN1Decoder with Carthage ...
*** xcodebuild output can be found in /var/folders/pf/7vhqx5bn41qddypw08w9jc4w0000gn/T/carthage-xcodebuild.TzqLBH.log
*** Skipped building ASN1Decoder due to the error:
Dependency "ASN1Decoder" has no shared framework schemes for any of the platforms: Mac
cp: /Users/tcurdt/Desktop/StoreKitExample/.accio/checkouts/ASN1Decoder/Carthage/Build/Mac/ASN1Decoder.framework: No such file or directory
Error: The operation couldn’t be completed. (SwiftShell.CommandError error 0.)

Running xcodebuild myself it builds just fine.

$ xcodebuild
...
CreateUniversalBinary /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework/ASN1Decoder normal armv7\ arm64 (in target: ASN1Decoder)
    cd /Users/tcurdt/Downloads/ASN1Decoder-1.3.1
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/lipo -create /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/ASN1Decoder.build/Release-iphoneos/ASN1Decoder.build/Objects-normal/armv7/ASN1Decoder /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/ASN1Decoder.build/Release-iphoneos/ASN1Decoder.build/Objects-normal/arm64/ASN1Decoder -output /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework/ASN1Decoder

CpHeader /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/ASN1Decoder/ASN1Decoder.h /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework/Headers/ASN1Decoder.h (in target: ASN1Decoder)
    cd /Users/tcurdt/Downloads/ASN1Decoder-1.3.1
    builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -resolve-src-symlinks /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/ASN1Decoder/ASN1Decoder.h /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework/Headers

GenerateDSYMFile /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework.dSYM /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework/ASN1Decoder (in target: ASN1Decoder)
    cd /Users/tcurdt/Downloads/ASN1Decoder-1.3.1
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/dsymutil /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework/ASN1Decoder -o /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework.dSYM

Touch /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework (in target: ASN1Decoder)
    cd /Users/tcurdt/Downloads/ASN1Decoder-1.3.1
    /usr/bin/touch -c /Users/tcurdt/Downloads/ASN1Decoder-1.3.1/build/Release-iphoneos/ASN1Decoder.framework

** BUILD SUCCEEDED **

Now I am wondering how to track this down. Is this a Carthage issue? Any pointers?

I am using:

$ accio version
Version: 0.6.3
$ carthage version
0.33.0
$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.14.6
BuildVersion:	18G87