more added

system/amd.nix

@@ -0,0 +1,3 @@
+{pkgs, ...}: {
+  hardware.amdgpu.initrd.enable = true;
+}

system/boot.nix

@@ -0,0 +1,12 @@
+{pkgs, ...}: {
+  boot = {
+    loader = {
+      systemd-boot = {
+        enable = true;
+      };
+    };
+    initrd = {
+      systemd.enable = true;
+    };
+  };
+}