[Nix-dev] Debugging nixpkgs

[Konrad Hinsen]

Rob Vermaas writes:

 > > For now, I am still stuck in figuring out why gfortran won't build on
 > > my MacOS X system. Is there a way to prevent nix-build from deleting
 > > its temporary work directory if the build fails? Seeing its state at
 > > the point of failure would help me to analyse the problem.
 >
 > $ nix-env --help
 >   ...
 >   --keep-failed / -K: keep temporary directories of failed builds

Thanks! nix-build understand the same option. But what it doesn't do
is tell me where the temporary directory actually is. I ended up
finding it using "find" on a file known to be there, but that's quite
inefficient.

Konrad.