[Trisquel-users] missing headers?

[donh824]

Hi all

made a fresh install of 5.5 mini on my wifes machine (with all the updates),  
when trying to install software (tried clementine and mumble from the command  
line, with synaptic and with add/remove software) I get a message that the  
headers could not be found, I know the software is there and works as I have  
it installed on my machine. anybody have any ideas?

cheers
stripe