Switch to JSON front matter
This makes the front matter compatible with Pandoc (as YAML is defined
as a superset of JSON).
nix: Include the new scm directory to the derivation sources
haunt: Add a pandoc-based Markdown reader
ci: Use Nixpkgs revision specified in channels.nix
Just moving more of the build into Nix's control.
nix: Move aasg-pkgs to function arguments
For not reason other than it looking cleaner to me that way.
nix: Restrict the derivation inputs precisely to the required files
Use an UTF-8 locale while building the derivation
I think Guile may be defaulting to ASCII otherwise.