Static Compilation about haskell-demo

[CMCDragonkai]

For haskell-only dependencies this was achieved with: ec7beb4

But for completely static executables, more things are needed including replacing glibc with musl.

[CMCDragonkai]

@nzhang-zh

[CMCDragonkai]

It turns out this is really important if we want to have smaller binaries, or not have to keep around all of the dependent haskell libraries. It really reduces the size of haskell applications down significantly. I'd think it almost should be done by default for any haskell apps even in the nixpkgs package set @rbellec @Zachaccino @DrFacepalm

[CMCDragonkai]

Not that important right now. It seems like static Haskell requires a change in the Nix tooling and the first thing to figure out would be cross-compilation.