#(import <nixpkgs> {}).callPackage (builtins.fetchurl "https://raw.githubusercontent.com/delroth/infra.delroth.net/master/pkgs/parsec.nix") {}
#(import <nixpkgs> {}).callPackage (builtins.fetchurl "https://raw.githubusercontent.com/delroth/infra.delroth.net/38a040e4bbfef7ee13c4b0a75dc79c77ddfdc759/pkgs/parsec.nix") {}