diff --git a/default.nix b/default.nix
index fb97169..87d7b21 100644
--- a/default.nix
+++ b/default.nix
@@ -1,11 +1,8 @@
 {
-  pkgs ? import ./pkgs.nix {},
+  pkgs ? import ./pkgs.nix,
 }: let
   lib = pkgs.lib;
-  rustPlatform = if pkgs ? pinnedRust then pkgs.makeRustPlatform {
-    rustc = pkgs.pinnedRust;
-    cargo = pkgs.pinnedRust;
-  } else pkgs.rustPlatform;
+  rustPlatform = pkgs.rustPlatform;
 in rustPlatform.buildRustPackage {
   name = "colmena-dev";
   version = "0.1.0";
diff --git a/dev-shell.nix b/dev-shell.nix
index d1bd66e..2637bbb 100644
--- a/dev-shell.nix
+++ b/dev-shell.nix
@@ -1,7 +1,7 @@
 let
-  pkgs = import ./pkgs.nix {};
+  pkgs = import ./pkgs.nix;
 in pkgs.mkShell {
   buildInputs = with pkgs; [
-    pinnedRust
+    rustc cargo
   ];
 }
diff --git a/nix/sources.json b/nix/sources.json
index ef8887e..d930c28 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -22,17 +22,5 @@
         "type": "tarball",
         "url": "https://github.com/NixOS/nixpkgs/archive/b94726217f7cdc02ddf277b65553762d520da196.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
-    },
-    "nixpkgs-mozilla": {
-        "branch": "master",
-        "description": "mozilla related nixpkgs (extends nixos/nixpkgs repo)",
-        "homepage": null,
-        "owner": "mozilla",
-        "repo": "nixpkgs-mozilla",
-        "rev": "8c007b60731c07dd7a052cce508de3bb1ae849b4",
-        "sha256": "1zybp62zz0h077zm2zmqs2wcg3whg6jqaah9hcl1gv4x8af4zhs6",
-        "type": "tarball",
-        "url": "https://github.com/mozilla/nixpkgs-mozilla/archive/8c007b60731c07dd7a052cce508de3bb1ae849b4.tar.gz",
-        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }
diff --git a/pkgs.nix b/pkgs.nix
index b01ded9..3d631de 100644
--- a/pkgs.nix
+++ b/pkgs.nix
@@ -1,20 +1,3 @@
-{
-  sources ? import ./nix/sources.nix,
-  rustNightly ? "2020-11-10",
-}: let
-  pkgs = import sources.nixpkgs {
-    overlays = [
-      (import sources.nixpkgs-mozilla)
-      (self: super: let
-        rustChannel = super.rustChannelOf {
-          channel = "nightly";
-          date = rustNightly;
-        };
-      in rec {
-        pinnedRust = rustChannel.rust.override {
-          extensions = [ "rust-src" ];
-        };
-      })
-    ];
-  };
-in pkgs
+let
+  sources = import ./nix/sources.nix;
+in import sources.nixpkgs {}
diff --git a/shell.nix b/shell.nix
index c1ce7c2..f07f30a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
 let
-  pkgs = import ./pkgs.nix {};
+  pkgs = import ./pkgs.nix;
 in pkgs.mkShell {
   buildInputs = [
     (import ./default.nix {})
diff --git a/src/command/exec.rs b/src/command/exec.rs
index 4a4a2f1..69c518f 100644
--- a/src/command/exec.rs
+++ b/src/command/exec.rs
@@ -131,7 +131,7 @@ pub async fn run(_global_args: &ArgMatches<'_>, local_args: &ArgMatches<'_>) {
     let progress = Arc::new(progress);
     let command: Arc<Vec<String>> = Arc::new(local_args.values_of("command").unwrap().map(|s| s.to_string()).collect());
 
-    progress.run(async move |progress| {
+    progress.run(|progress| async move {
         let mut futures = Vec::new();
 
         for (name, host) in hosts.drain() {
diff --git a/src/main.rs b/src/main.rs
index 16783f3..102a087 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,3 @@
-#![feature(async_closure)]
-
 use std::env;
 use clap::{App, AppSettings, Arg};
 
diff --git a/src/nix/deployment.rs b/src/nix/deployment.rs
index abe4667..3f27160 100644
--- a/src/nix/deployment.rs
+++ b/src/nix/deployment.rs
@@ -261,7 +261,7 @@ impl Deployment {
 
         {
             let arc_self = self.clone();
-            progress.run(async move |progress| {
+            progress.run(|progress| async move {
                 let mut futures = Vec::new();
 
                 for node in self.target_names.iter() {
@@ -324,7 +324,7 @@ impl Deployment {
             let arc_self = self.clone();
             let eval_limit = arc_self.clone().eval_limit();
 
-            progress.run(async move |progress| {
+            progress.run(|progress| async move {
                 let mut futures = Vec::new();
 
                 for chunk in self.target_names.chunks(eval_limit) {