5cc7bcda30
Previously this was done in three derivations (one to build the raw disk image, one to convert to OVA, one to add a hydra-build-products file). Now it's done in one step to reduce the amount of copying to/from S3. In particular, not uploading the raw disk image prevents us from hitting hydra-queue-runner's size limit of 2 GiB.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.