module `socket` is in file 'std/c/linux/socket.d' which cannot be read

[bachmeier]

I'm trying to use Adam's cgi.d. I'm trying to compile previously 
working code, but I get the following error:

cgi.d(2711): Error: module `socket` is in file 
'std/c/linux/socket.d' which cannot be read
import path[0] = /usr/include/dmd/phobos
import path[1] = /usr/include/dmd/druntime/import

Any suggestions?