diff --git a/raspberry-pi/4/default.nix b/raspberry-pi/4/default.nix
index acbfcf0..7c442ff 100644
--- a/raspberry-pi/4/default.nix
+++ b/raspberry-pi/4/default.nix
@@ -32,7 +32,7 @@
     };
   };
 
-  hardware.deviceTree.filter = "bcm2711-rpi-*.dtb";
+  hardware.deviceTree.filter = lib.mkDefault "bcm2711-rpi-*.dtb";
 
 
   assertions = [
diff --git a/raspberry-pi/4/poe-hat.nix b/raspberry-pi/4/poe-hat.nix
index b31dc42..5d6cf8d 100644
--- a/raspberry-pi/4/poe-hat.nix
+++ b/raspberry-pi/4/poe-hat.nix
@@ -13,6 +13,8 @@ in {
 
   config = lib.mkIf cfg.enable {
     hardware.raspberry-pi."4".apply-overlays-dtmerge.enable = lib.mkDefault true;
+    # doesn't work for the CM module, so we exclude e.g. bcm2711-rpi-cm4.dts
+    hardware.deviceTree.filter = "bcm2711-rpi-4*.dtb";
 
     hardware.deviceTree = {
       overlays = [
diff --git a/raspberry-pi/4/poe-plus-hat.nix b/raspberry-pi/4/poe-plus-hat.nix
index e6f806f..bd7c28e 100644
--- a/raspberry-pi/4/poe-plus-hat.nix
+++ b/raspberry-pi/4/poe-plus-hat.nix
@@ -13,6 +13,8 @@ in {
 
   config = lib.mkIf cfg.enable {
     hardware.raspberry-pi."4".apply-overlays-dtmerge.enable = lib.mkDefault true;
+    # doesn't work for the CM module, so we exclude e.g. bcm2711-rpi-cm4.dts
+    hardware.deviceTree.filter = "bcm2711-rpi-4*.dtb";
 
     hardware.deviceTree = {
       overlays = [