diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e6cae63..a4439cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest] # FIXME: macos-latest
+        os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v2
 
diff --git a/shell.nix b/shell.nix
index ef72f24..3c5a116 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,6 +1,6 @@
 let
   rust = import (builtins.fetchTarball
-    "https://github.com/oxalica/rust-overlay/archive/783722a22ee5d762ac5c1c7b418b57b3010c827a.tar.gz");
+    "https://github.com/oxalica/rust-overlay/archive/bb5adbd2a830e00aa783d9189f1f4183182663fd.tar.gz");
   pkgs = import (builtins.fetchTarball
     "https://github.com/NixOS/nixpkgs/archive/58f87c20e1abbbe835f1f3106ecea10fd93c4a90.tar.gz") {
       overlays = [ rust ];