MD5 algorithm fixed-output derivations broken by nixpkgs:

[considerate]

Nixpkgs now throws errors when outputHashAlgo is "md5" this means that stdenv.mkDerivation cannot be used in dvc.nix because of the insecurity of the MD5 hash algorithm. I think a short-term solution would be to create a derivation without going through stdenv.mkDerivation.

It seems that DVC might go with blake3 as their next hashing algorithm:

iterative/dvc#3069

However, nix still doesn't support blake3 as the algorithm:

NixOS/nix#8475

Thus, I think we need to continue supporting MD5 for the time being, despite nixpkgs dropping support for it.

[considerate]

Closed in #3