diff --git a/flake.nix b/flake.nix
index 0f2c22c..14959a0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -5,7 +5,13 @@
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
   inputs.flake-utils.url = "github:numtide/flake-utils";
 
-  outputs = inputs: inputs.flake-utils.lib.eachDefaultSystem
+  outputs = inputs: inputs.flake-utils.lib.eachSystem [
+    "x86_64-linux"
+    "aarch64-linux"
+    "riscv64-linux"
+    "x86_64-darwin"
+    "aarch64-darwin"
+  ]
     (system:
       let
         pkgs = inputs.nixpkgs.legacyPackages.${system};
diff --git a/tests/extra/language.hare.nix b/tests/extra/language.hare.nix
index be53654..d67c8a8 100644
--- a/tests/extra/language.hare.nix
+++ b/tests/extra/language.hare.nix
@@ -2,7 +2,8 @@
   pkgs,
   devshell,
   runTest,
-}: {
+}:
+pkgs.lib.optionalAttrs (!pkgs.hostPlatform.isDarwin) {
   # Basic test
   language-hare-1 = let
     shell = devshell.mkShell {