[Nix-dev] lens 4 transition plan?

[Marc Weber]

You're right, hack-nix assumes that there are too many variations of
building packages, which is why it allows to change "flags" for
individual targets. You're right, there are no "binary caches", but once
a dependency got compiled its likely to be reused for other projects,
most libraries get compiled fast once you have ghc - and ghc is the
same ..

hack-nix provides another nice feature for "power users" (like you claim
to be one): it generates tags for all depedencies, thus you can jump to
source easily - eg map or sequence or whatever you use.

There are pro/cons. Of course do whatever you feel happy with :)

Marc Weber