Add miso-from-html to shell

default.nix

@@ -1,12 +1,15 @@
-{ pkgs ? import ./nixpkgs.nix }:
+{ nixpkgs ? import <nixpkgs> {}, }:
 
 let
+  pkgs = import ./nixpkgs.nix { nixpkgs = nixpkgs; } ;
+
   inherit (pkgs.haskell.packages) ghcjs;
   drv = ghcjs.callCabal2nix "chandlr" ./. {};
 
   env = drv.env.overrideAttrs (oldAttrs: {
     buildInputs = oldAttrs.buildInputs ++ [
       pkgs.haskell.packages.ghc.cabal-install
+      nixpkgs.haskellPackages.miso-from-html
     ];
   });
 

nixpkgs.nix

@@ -1,7 +1,6 @@
+{ nixpkgs }:
 let
-  bootstrap = import <nixpkgs> {};
-
-  nixpkgs-src = bootstrap.fetchFromGitHub {
+  nixpkgs-src = nixpkgs.fetchFromGitHub {
     owner = "NixOS";
     repo  = "nixpkgs";
     rev = "3fd87ad0073fd1ef71a8fcd1a1d1a89392c33d0a";