diff --git a/default.nix b/default.nix
index 6408d618..f108e799 100644
--- a/default.nix
+++ b/default.nix
@@ -1,7 +1,7 @@
 { pkgs ? (import <nixpkgs> {}) }:
 
 let
-  env = with pkgs.rustUnstable; [
+  env = with pkgs.rustStable; [
     rustc
     cargo
     pkgs.llvmPackages.lldb
diff --git a/src/main.rs b/src/main.rs
index 9e1f99cf..99494a4b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(box_patterns)]
-
 #[macro_use] extern crate clap;
 #[macro_use] extern crate log;
 #[macro_use] extern crate serde;