diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..5c9f82f
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> {}, withImplicitSnap ? false }:
+let
+  src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
+in
+  if withImplicitSnap
+  then pkgs.haskellPackages.callCabal2nixWithOptions "implicit" src "-fimplicitsnap" { }
+  else pkgs.haskellPackages.callCabal2nix "implicit" src { }
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..3fc59e1
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,2 @@
+{ pkgs ? import <nixpkgs> {}, withImplicitSnap ? true }:
+(import ./default.nix { inherit pkgs withImplicitSnap; }).env