From 687be80dff1ff5674a5e3e6f578e9732d1746cc8 Mon Sep 17 00:00:00 2001
From: Thomas Tuegel <ttuegel@gmail.com>
Date: Sun, 29 Jan 2017 17:24:45 -0600
Subject: [PATCH] Add a nix-shell expression

---
 shell.nix | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 shell.nix

diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..2f8cc5c
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,15 @@
+{ nixpkgs ? import <nixpkgs> {}, compiler ? "default" }:
+
+let
+
+  inherit (nixpkgs) pkgs;
+
+  haskellPackages = if compiler == "default"
+                       then pkgs.haskellPackages
+                       else pkgs.haskell.packages.${compiler};
+
+  drv = haskellPackages.callPackage ./. {};
+
+in
+
+  if pkgs.lib.inNixShell then drv.env else drv