>On further reflection, I think I see how it almost might work using >derivations. Assume it is possible to have a derivation that is only >considered to be built (hand-waving part here ...) if the required filesystem >exists. Then that derivation depends on another that is only considered to be >built if the necessary LVM volume exists, etc. . I still cannot see how to >make the hand-waving part referentially transparent. > >I think nixos must have a solution to this problem, otherwise how can it >install GRUB ?
NixOS way is to generate the needed scripts (preferably, the scripts can be safely run the second time after success) and run them. _______________________________________________ nix-dev mailing list nix-dev@lists.science.uu.nl http://lists.science.uu.nl/mailman/listinfo/nix-dev
