nix

default.nix

@@ -0,0 +1,15 @@
+{ mkDerivation, aeson, base, bytestring, ghc-prim, http-client
+, http-conduit, http-types, lib, mtl, scientific, text, time
+, transformers, unordered-containers, vector
+}:
+mkDerivation {
+  pname = "launchdarklyapi";
+  version = "0.1.0.0";
+  src = ./.;
+  libraryHaskellDepends = [
+    aeson base bytestring ghc-prim http-client http-conduit http-types
+    mtl scientific text time transformers unordered-containers vector
+  ];
+  license = "unknown";
+  hydraPlatforms = lib.platforms.none;
+}

nix/overlays.nix

@@ -0,0 +1,2 @@
+[ (import ./overlays/aeson.nix)
+]

nix/overlays/aeson.nix

@@ -0,0 +1,3 @@
+self: super: rec {
+  aeson = super.haskell.lib.dontCheck (self.callHackage "aeson" "1.5.6.0" {});
+}

shell.nix

@@ -1,9 +1,15 @@
 let
-  pkgs = import <nixpkgs> {};
+  pkgs = import <nixpkgs> { overlays = (import ./nix/overlays.nix); };
+  # haskellPackages = pkgs.haskellPackage.override {
+  #   overrides = self: super: rec {
+  #     aeson = pkgs.haskell.lib.dontCheck (self.callHackage "aeson" "1.5.6.0" {});
+  #   };
+  # };
+  project = pkgs.haskellPackages.callPackage ./default.nix {};
 in
 pkgs.mkShell {
   name = "launchdarklyapi";
-  buildInputs = with pkgs; [
+  buildInputs = with pkgs; project.env.nativeBuildInputs ++ [
     cabal-install
     ghc
   ];