Add nix files

default.nix

@@ -0,0 +1,19 @@
+{ mkDerivation, aeson, base, bytestring, hashable, hspec
+, http-media, lens, servant, stdenv, string-conversions, text
+, unordered-containers
+}:
+mkDerivation {
+  pname = "servant-docs";
+  version = "0.3";
+  src = ./.;
+  isLibrary = true;
+  isExecutable = true;
+  buildDepends = [
+    aeson base bytestring hashable http-media lens servant
+    string-conversions text unordered-containers
+  ];
+  testDepends = [ aeson base hspec lens servant ];
+  homepage = "http://haskell-servant.github.io/";
+  description = "generate API docs for your servant webservice";
+  license = stdenv.lib.licenses.bsd3;
+}

shell.nix

@@ -0,0 +1,9 @@
+with (import <nixpkgs> {}).pkgs;
+let modifiedHaskellPackages = haskellngPackages.override {
+      overrides = self: super: {
+        servant = self.callPackage ../servant {};
+        servant-server = self.callPackage ./servant-server {};
+        servant-docs = self.callPackage ./. {};
+      };
+    };
+in modifiedHaskellPackages.servant-docs.env