std.net.curl is not working?

[mab]

Why i get the following Error, when i try to compile a simple 
"Hello World" that imports std.net.curl=

The Error:
# dmd hello.d
/usr/lib/x86_64-linux-gnu/libphobos2.a(curl.o): In function 
`_D3std3net4curl4Curl19_sharedStaticCtor28FZv':
std/net/curl.d:(.text._D3std3net4curl4Curl19_sharedStaticCtor28FZv+0xf): 
undefined reference to `curl_global_init'
/usr/lib/x86_64-linux-gnu/libphobos2.a(curl.o): In function 
`_D3std3net4curl4Curl19_sharedStaticDtor29FZv':
std/net/curl.d:(.text._D3std3net4curl4Curl19_sharedStaticDtor29FZv+0x5): 
undefined reference to `curl_global_cleanup'
collect2: ld returned 1 exit status
--- errorlevel 1
The Code:
import std.stdio;
import std.net.curl;

void main()
{
  writeln("hello world");
}

My Testsystem: Debian
# uname -a
Linux dexplorer 2.6.32-5-amd64 #1 SMP Mon Feb 25 00:26:11 UTC 
2013 x86_64 GNU/Linux

curl is installed by apt-get install curl.

Thanks!