make: *** [Makefile:12: appclient] Error 2

[dragonxtek]

I can't compile it. I have the following issue:

make
make -C udt/src/
make[1]: Entering directory '/tmp/udt_d/udt/src'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/tmp/udt_d/udt/src'
dub --compiler=dmd
Performing "debug" build using dmd for x86_64.
udt_d 0.0.1+commit.5.ga08a9f5: target for configuration "library" is up to date.
Target is a library. Skipping execution.
make: [Makefile:9: udtwrap] Error 2 (ignored)
cd appclient && dub build --compiler=dmd
Performing "debug" build using dmd for x86_64.
appclient ~master: building configuration "application"...
source/appclient.d(25,11): Error: undefined identifier getaddrinfo
source/appclient.d(48,2): Error: undefined identifier freeaddrinfo
source/appclient.d(50,11): Error: undefined identifier getaddrinfo
source/appclient.d(57,21): Error: undefined identifier SocketAddress, did you mean struct SocketAddressIn?
source/appclient.d(59,2): Error: undefined identifier freeaddrinfo
dmd failed with exit code 1.
make: *** [Makefile:12: appclient] Error 2

Do you have any idea what can I do?