diff --git a/nix/flake.nix b/nix/flake.nix
index 23cb2f5..db29965 100644
--- a/nix/flake.nix
+++ b/nix/flake.nix
@@ -19,6 +19,7 @@
     system = "aarch64-darwin";
     pkgs = import nixpkgs {
       inherit system;
+      config.allowUnfree = true;
       overlays = [
         (import ./overlays/jpm.nix)
         (import ./overlays/bleve.nix)
@@ -84,6 +85,7 @@
         pkgs.iina
         pkgs.macmon
         pkgs.docker
+        pkgs.slack
       ] else []);
     };
   };