Un-break nix build + nix develop (#135)

Author: jisantuc

flake.nix

@@ -13,19 +13,23 @@
 
         hsPkgs = pkgs.haskellPackages.extend (self: super: {
           dataframe = self.callCabal2nix "dataframe" ./. { };
+          random = pkgs.haskellPackages.callHackage "random" "1.3.1" { };
+          time-compat = pkgs.haskell.lib.dontCheck super.time-compat;
         });
       in
       {
         packages = {
           default = hsPkgs.dataframe;
         };
 
-        devShells.default = pkgs.mkShell {
-          buildInputs = with pkgs; [
+        devShells.default = hsPkgs.shellFor {
+          packages = ps: [ (ps.callCabal2nix "dataframe" ./. { }) ];
+          nativeBuildInputs = with pkgs; [
             ghc
             cabal-install
             haskell-language-server
           ];
+          withHoogle = true;
         };
       });
 }