newbie question about dub

[Oleg via Digitalmars-d-learn]

Hello.
I'm developing library and want to add an examples to the same 
project. If I understand corecly, DUB allows to build a 
dependencies from another folder and use them to build a program. 
I've tried two ways - subConfigurations and subPackages. For 
example, there is subConfigurations config:

{
        "name": "dfuse",
         "description": "FUSE D binding.",
         "copyright": "Copyright",
        "authors": ["Oleh"],
                
                
        "configurations": [
                {
                        "name": "dfuse-lib",
                        "targetType": "library",
                        "targetName": "dfuse",
                        "targetPath": "build/lib",
                        "versions": ["trace"]
                },
                {
                        "name": "dfuse-examples",
                        "targetType": "executable",
                        "targetPath": "build/examples",
                        "versions": ["trace"],
                        "importPaths": ["build/lib"],
                        
                        
                        "libs": ["fuse"],

                        "dependencies": {
                                "dfuse": ">=1.0.0"
                        },
                                                
                        "subConfigurations": {
                                "dfuse": "dfuse-lib",
                        }
                }
        ]
}

But it throws next error:


Failed to retrieve metadata for package dfuse: Could not find 
package candidate for dfuse >=1.0.0
Could not resolve dependencies
The dependency graph could not be filled, there are unresolved 
dependencies.
The following changes will be performed:
Failure dfuse >=1.0.0, userWide
 -> issued by:
    dfuse: >=1.0.0
Error executing command build: Aborting package retrieval due to 
errors.

QUESTION: How to define the dfuse library version of I'm doing it 
wrong way?

It would be perfect if someone have same configuration 
(library+executable) and can share it.

Thanks.