Add sysDevicesSupport to nixpkgs overlay

m/common/base/sys-devices.nix

@@ -6,4 +6,10 @@
     "/sys/devices/system/cpu"
     "/sys/devices/system/node"
   ];
+
+  # similar to cudaSupport, this can be used to activate certain features
+  # conditionally.
+  nixpkgs.overlays = [
+    (final: prev: { sysDevicesSupport = true; })
+  ];
 }