Am Montag, 21. Januar 2013 schrieb Ludovic Courtès:
> Alternately, you could move the ‘check’ phase after the install phase,
> like this (untested):

But then, if the check fails, the /nix/store would contain an "invalid" 
package, no? I think it would be desirable to install only packages for 
which the check succeeds (granted, installation itself may fail, but this 
is less likely).

Andreas