{
  "owner": "NixOS",
  "repo": "nixpkgs-channels",
  "rev": "571b40d3f50466d3e91c1e609d372de96d782793",
  "sha256": "0qjpkx2b5pac1nqr5chvlrlcyyk294w2079ybf88p95qxkqbbby5"
}

{
  "owner": "obsidiansystems",
  "repo": "nixpkgs",
  "rev": "a6f82a06b2be2e615513dda985f1dfd9f08efc93",
  "sha256": "0gibajs3xka3apa5w5ac2plaxg6v9wji3izwq32ylly6r55b6fh5"
}

Switch to forked nixpkgs 18.09 with ghcjs86 backported
Switch to forked nixpkgs 18.09 with ghcjs86 backported
