diff --git a/nix/system/framework/configuration.nix b/nix/system/framework/configuration.nix
index a9d1445..8056b81 100644
--- a/nix/system/framework/configuration.nix
+++ b/nix/system/framework/configuration.nix
@@ -68,17 +68,12 @@
   # $ nix search wget
   environment.systemPackages = with pkgs; [
     cachix
-    nixopsUnstable
+    colmena
     vim
     wget
     zsh
   ];
 
-  # nixopsUnstable relies on an insecure package via poetry.
-  nixpkgs.config.permittedInsecurePackages = [
-    "python3.10-cryptography-3.4.8"
-  ];
-
   nixpkgs.config.allowUnfree = true;
 
   # Open ports in the firewall.