DUB errors

C:\Users\Standardbenutzer\Downloads\DUB\my_test_project>dub init test
Package recipe format (sdl/json) [json]: json
Name [test]: myfirstdubtest
Description [A minimal D application.]: justatest
Author name [Standardbenutzer]: std
License [proprietary]: doesntmatter
Copyright string [Copyright ┬® 2016, Standardbenutzer]: yes
Add dependency (leave empty to skip) []: onyx-config
Added dependency onyx-config ~>2.0.4
Add dependency (leave empty to skip) []: onyx-serial
Added dependency onyx-serial ~>0.4.0
Add dependency (leave empty to skip) []:
Successfully created an empty project in 'C:\Users\Standardbenutzer\Downloads\DUB\my_test_project\test'.
Package sucessfully created in test

C:\Users\Standardbenutzer\Downloads\DUB>cd test

C:\Users\Standardbenutzer\Downloads\DUB\test>dub build
Performing "debug" build using dmd for x86.
onyx-config 2.0.4: target for configuration "library" is up to date.
onyx-serial 0.4.0: building configuration "library"...
..\..\..\AppData\Roaming\dub\packages\onyx-serial-0.4.0\onyx-serial\source\onyx\serial.d(93,15): Error: undefined identifier 'Impl', did you mean variable 'impl'?
..\..\..\AppData\Roaming\dub\packages\onyx-serial-0.4.0\onyx-serial\source\onyx\serial.d(602,19): Error: undefined identifier 'termios'
..\..\..\AppData\Roaming\dub\packages\onyx-serial-0.4.0\onyx-serial\source\onyx\serial.d(768,10): Error: undefined identifier 'speed_t', did you mean function 'speed'?
dmd failed with exit code 1.