Nix 2.7 made some changes to the Flake schema:

• https://discourse.nixos.org/t/nix-2-7-0-released/18072

Switch now to the new schema to avoid pain down the line. It's not a train smash as far as I can tell, but Nixie libs, pkgs and docs (especially the wiki pages) will need updating.

These two packages are marked as broken in the Nixpkgs (21.11) Haskell set (GHC 8.10.7) we're using in Nixie at the moment:

• haddock-api-2.25.0
• diagrams-graphviz-1.4.1.1

So when you try building Nixie's Haskell env, Nix moans about them being "marked as broken" and fails the build.

Diagrams-Graphviz I pull in myself, so I commented that out in the Haskell env. But Haddock API is a dep of Haddock, so I had to comment out Haddock in the Haskell env to make the env derivation build. Notice that these guys have a history of being broken

• c0c0n3/trixie-dotses#20
• c0c0n3/trixie-dotses@c3453ba
• c0c0n3/trixie-dotses@9a2d603

Also keep in mind there's even more broken packages in the GHC 9.2.1 set. To see that, swap out

pkgs.haskellPackages.ghcWithPackages

for

pkgs.haskell.packages.ghc921.ghcWithPackages

in the mkEnv function.

Come up with a solution!

Put together a better CLI tools package.

• Consider zapping builtins.currentSystem.
• Consider if you really need the pkgs / package split.
• Come up w/ a better selection of CLI tools. E.g. use curl instead of aria, dua instead of du-dust, dogdns instead of ldns, nmap instead of ncat, eza instead of tree, ditch x11 stuff since we're moving to Wayland.