nixpkgs includes a lispPackages set which is generated from something.
In the meantime, we pretty much never update our Lisp deps.
This commit ties our sources to nixpkgs.lispPackages where the desired
package is included in nixpkgs (which is actually most of them!)
Change-Id: I520a006535980271b2fa4e0ed4e34029475dcbef
Reviewed-on: https://cl.tvl.fyi/c/depot/+/4331
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Luckily we don't need to deal with this mess since all our
implementations work similarly wrt streams and “wide” characters.
Change-Id: I3ccc606a59c42791f2591d752673c867d848a332
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3485
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
