[Nix-dev] Bootstrap Tool Storage

[Shea Levy]

As far as I know, and with the notable exception of stdenv's gcc, 
nixpkgs uses non-nix specific bootstrap tools to for all packages that 
need them (e.g. ghc binaries, gentoo's gnatboot for gnat, the 
proprietary Oracale jdk for openjdk). It is often desirable, however, to 
create our own bootstrap tools. For example, our currently-packaged 
gnatboot fails at building gnat46, and therefore gnat46 uses gnat45 as a 
bootstrap, requiring a two-stage bootstrap if gnat45 isn't available by 
substitution. In such cases, is there a good place to store bootstrap 
tarballs? Or should each maintainer use his own space somewhere?

~Shea