Use haskellSrc2nix over explicit cabal2nix

Use the (undocumented!) helper function haskellSrc2nix over having to
explicitly run cabal2nix all the time when rebuilding

1 files changed, 9 insertions, 0 deletions

diff --git a/nixpkgs.nix b/nixpkgs.nix
new file mode 100644
index 000000000000..19bf2c59cedd
--- /dev/null
+++ b/nixpkgs.nix
@@ -0,0 +1,9 @@
+let
+  inherit (import <nixpkgs> {}) fetchFromGitHub;
+  nixpkgs = fetchFromGitHub {
+    owner  = "NixOS";
+    repo   = "nixpkgs-channels";
+    rev    = "54f385241e6649128ba963c10314942d73245479";
+    sha256 = "0bd4v8v4xcdbaiaa59yqprnc6dkb9jv12mb0h5xz7b51687ygh9l";
+  };
+in import nixpkgs