add retroarch cores

modules/home/default.nix

@@ -16,6 +16,7 @@
     ++ [(import ./micro.nix)]                     # nano replacement
     ++ [(import ./nvim.nix)]                      # neovim editor
     ++ [(import ./packages.nix)]                  # other packages
+    ++ [(import ./retroarch.nix)]
     ++ [(import ./scripts/scripts.nix)]           # personal scripts
     ++ [(import ./starship.nix)]                  # shell prompt
     ++ [(import ./swaylock.nix)]                  # lock screen

modules/home/gaming.nix

@@ -23,7 +23,6 @@
     ## Emulation
     sameboy
     snes9x
-    retroarch
     # cemu
     # dolphin-emu
   ];

modules/home/retroarch.nix

@@ -0,0 +1,13 @@
+{ pkgs, ... }: 
+{
+  home.packages = (with pkgs; [
+    (retroarch.override {
+      cores = with libretro; [
+        fceumm
+        gambatte
+        mgba
+        snes9x
+      ];
+    })
+  ]);
+}