From 50b10465361511b4e54dbd84bd99a63c1a5e282e Mon Sep 17 00:00:00 2001
From: John Ericson <git@JohnEricson.me>
Date: Sat, 9 Mar 2019 17:40:38 -0500
Subject: [PATCH] Expose a haskell package set, don't use inNixStore for shell

---
 default.nix | 8 +++++---
 shell.nix   | 1 +
 2 files changed, 6 insertions(+), 3 deletions(-)
 create mode 100644 shell.nix

diff --git a/default.nix b/default.nix
index 8d18953..9614fe3 100644
--- a/default.nix
+++ b/default.nix
@@ -21,7 +21,6 @@
            config.allowBroken = false;
          }
 
-, returnShellEnv ? pkgs.lib.inNixShell
 , mkDerivation   ? null
 }:
 
@@ -62,10 +61,13 @@ drv = haskellPackages.developPackage {
       ++ pkgs.stdenv.lib.optional doOptimize "--flags=optimize"
       ++ pkgs.stdenv.lib.optional doStrict   "--ghc-options=-Werror";
 
-    passthru = { nixpkgs = pkgs; };
+    passthru = {
+      nixpkgs = pkgs;
+      inherit haskellPackages;
+    };
   });
 
-  inherit returnShellEnv;
+  returnShellEnv = false;
 };
 
 in drv
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..0e50343
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1 @@
+{} @ attrs: (import ./. attrs).env