diff --git a/configuration.nix b/configuration.nix
index 00acc9b..5cf523c 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -20,6 +20,7 @@ in
     ./.luks-swap.nix
     ./fonts.nix
     ./extra
+    ./core/
   ];
 
   hardware.bluetooth.enable = true;
diff --git a/core/default.nix b/core/default.nix
new file mode 100644
index 0000000..bf7d4d2
--- /dev/null
+++ b/core/default.nix
@@ -0,0 +1,5 @@
+{
+    imports = [
+        ./dotnet.nix
+    ];
+}
diff --git a/core/dotnet.nix b/core/dotnet.nix
new file mode 100644
index 0000000..50b2cc0
--- /dev/null
+++ b/core/dotnet.nix
@@ -0,0 +1,6 @@
+{ pkgs, config, ... }: {
+    environment.systemPackages = with pkgs; [
+        dotnet-sdk
+        mono
+    ];
+}