Failed on getting apt key

[drum]

When I try and get the key to insatll repo for beryl after adding repo to sources list
I get this:
Any ideas please?

wget http://ubuntu.beryl-project.org/root@lupine.me.uk.gpg -O- | apt-key add -
Password:
--14:19:12-- http://ubuntu.beryl-project.org/root@lupine.me.uk.gpg
=> `-'
Resolving ubuntu.beryl-project.org... 195.114.19.35, 80.77.247.17, 82.140.42.54, ...
Connecting to ubuntu.beryl-project.org|195.114.19.35|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2,415 (2.4K) [application/octet-stream]

100%[====================================>] 2,415 --.--K/s

14:19:13 (305.89 KB/s) - `-' saved [2415/2415]

gpg: no writable keyring found: eof
gpg: error reading `-': general error
gpg: import from `-' failed: general error

[clem]

try a "sudo apt-key add yourfile.gpg"