pandoc2 is broken - the dependencies fail to resolve:

nix-shell -p haskellPackages.pandoc_2_0_4
...
Configuring hslua-module-text-0.1.2.1...
Setup: Encountered missing dependencies:
hslua ==0.9.*

Hopefully this is the right way to fix this

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.