dub: Detected dependency cycle

[unDEFER via Digitalmars-d]

Hello!
Finally I have added my bdb2d package to dub.
But something is going wrong and when I'm trying to use my own 
pakcage it say me:
$ dub
Detected dependency cycle: bdb2d->bdb2d

dub.json from bdb2d:
{
     "name": "bdb2d",
     "targetName": "db",
     "targetType": "library",
     "description": "BerkeleyDB to D bindings.",
     "authors": ["Nikolay (unDEFER) Krivchenkov"],
     "homepage": "http://unde.su",
     "license": "GPL-3.0 or later",
     "sourcePaths": ["berkeleydb"],
     "libs-posix": ["db"],

     "subPackages": [
         {
             "name": "reader",
             "description": "BerkeleyDB Transaction test. Reader",
             "targetName": "reader",
             "targetType": "executable",
             "sourceFiles": ["transactions_test/reader.d"],
             "targetPath": "transactions_test",
             "dependencies": {
                 "bdb2d": "*"
             }
         }, {
             "name": "writer",
             "description": "BerkeleyDB Transaction test. Writer",
             "targetName": "writer",
             "targetType": "executable",
             "sourceFiles": ["transactions_test/writer.d"],
             "targetPath": "transactions_test",
             "dependencies": {
                 "bdb2d": "*"
             }
         }
     ]
}

It has 2 subpackages, and they both uses bdb2d, but it is not 
dependency cycle because bdb2d doesn't use these subpackages.
So What I'm doing wrong?
dub.json of the second project:
{
     "name": "bdb2d",
     "targetName": "db",
     "targetType": "executable",
     "description": "unDE - ultimate native Desktop Environment.",
     "authors": ["Nikolay (unDEFER) Krivchenkov"],
     "homepage": "http://unde.su",
     "license": "GPL-3.0 or later",
     "dependencies": {
         "bdb2d": ">=5.3.28",
         "derelict-sdl2":">=2.0.0"
     }
}