Hi guys, I hope I'm posting this to the right forum!

I'm getting this error when I try to build my dub project from within Xamarin studio (monod):

Root package d2harle:opengl3 contains reference to invalid package derelict:util >=2.0.3 <2.1.0

I'm having some trouble figuring out what the error means and how to fix it.

Xamarin tries to build like this:

dub build "d2harle:opengl3" "--build=plain"
Building package d2harle:opengl3 in C:\D\d2harle\Exit code 2
Build complete -- 1 error, 0 warnings

When I build it manually (without arguments), it works fine:

dub
Performing "debug" build using dmd for x86.
derelict-util 2.0.4: target for configuration "library" is up to date.
derelict-gl3 1.0.17: target for configuration "library" is up to date.
derelict-glfw3 1.1.0: target for configuration "library" is up to date.
derelict-sdl2 1.9.7: target for configuration "library" is up to date.
d2harle ~master: target for configuration "application" is up to date.
To force a rebuild of up-to-date targets, run again with --force.
Running .\d2harle.exe

I've tried both dub clean-cache and upgrade options but it doesn't fix it.

Any suggestions on what to do? :-)

My package.json looks like this 

{
        "name": "d2harle",
        "description": "An example project skeleton",
        "homepage": "http://pappons.com",
        "copyright": "Copyright © 2015, Frederik Aagaard",
        "authors": [
                "Frederik Aagaard"
        ],
        "dependencies": {
                "derelict-gl3": "~>1.0.15",
                "derelict-glfw3": "~>1.1.0",
                "derelict-sdl2": "~>1.9.7",
                "derelict-util": "~>2.0.3",

        },

        "subPackages" : [
                {
                        "name": "opengl3",
                        "dependencies": {"derelict:util": "~>2.0.3"},
                        "targetPath": "lib",
                        "sourcePaths": ["import/derelict/opengl3"],
                        "importPaths": ["import"]
                },
                {
                        "name": "glfw3",
                        "dependencies": {"derelict:util": "~>2.0.3"},
                        "targetPath": "lib",
                        "sourcePaths": ["import/derelict/glfw3"],
                        "importPaths": ["import"]
                },
                {
                        "name": "sfml2",
                        "dependencies": {"derelict:util": "~>2.0.3"},
                        "targetPath": "lib",
                        "sourcePaths": ["import/derelict/sfml2"],
                        "importPaths": ["import"]
                },
        ]
}

Thanks in advance!