diff --git a/m/module/amd-uprof.nix b/m/module/amd-uprof.nix
index 299627f7..f405e1e0 100644
--- a/m/module/amd-uprof.nix
+++ b/m/module/amd-uprof.nix
@@ -27,14 +27,18 @@
     services.udev.extraRules = let
       # To create the device node we need to read the device number from the
       # /proc directory, so the module must have been loaded first.
-      addDevice = pkgs.writeScript "add-amd-uprof-dev.sh"
-        "mknod /dev/AMDPowerProfiler -m 666 c $(< /proc/AMDPowerProfiler/device) 0";
-      removeDevice = pkgs.writeScript "remove-amd-uprof-dev.sh"
-        "rm /dev/AMDPowerProfiler";
+      addDevice = pkgs.writeShellScript "add-amd-uprof-dev.sh" ''
+        set -x
+        echo date > /tmp/uprof.log
+        mknod /dev/AMDPowerProfiler -m 666 c $(< /proc/AMDPowerProfiler/device) 0
+      '';
+      removeDevice = pkgs.writeShellScript "remove-amd-uprof-dev.sh" ''
+        rm /dev/AMDPowerProfiler
+      '';
     in
       ''
-        SUBSYSTEM=="module", DEVPATH=="/module/AMDPowerProfiler", ACTION=="add", RUN+="${addDevice}"
-        SUBSYSTEM=="module", DEVPATH=="/module/AMDPowerProfiler", ACTION=="remove", RUN+="${removeDevice}"
+        KERNEL=="AMDPowerProfiler", SUBSYSTEM=="module", ACTION=="add", RUN+="${addDevice}"
+        KERNEL=="AMDPowerProfiler", SUBSYSTEM=="module", ACTION=="remove", RUN+="${removeDevice}"
       '';
   };
 }