diff --git a/pkgs/misc/rivalcfg/default.nix b/pkgs/misc/rivalcfg/default.nix
index e30f27ddec2a..737a3839d7a0 100644
--- a/pkgs/misc/rivalcfg/default.nix
+++ b/pkgs/misc/rivalcfg/default.nix
@@ -19,20 +19,22 @@ python3Packages.buildPythonPackage rec {
   # tests are broken
   doCheck = false;
 
-  # this file has to be copied here instead of generated at build time because
-  # rivalcfg --update-udev will fail if it detects a supported device but cannot
-  # access it
-  # it should probably be regenerated on version bumps
   postInstall = ''
     set -x
     mkdir -p $out/lib/udev/rules.d
-    substitute ${./rival.rules} $out/lib/udev/rules.d/99-rivalcfg.rules --replace MODE=\"0666\" "MODE=\"0664\", GROUP=\"input\""
+    tmpl_udev="$out/lib/udev/rules.d/99-rivalcfg.rules"
+    tmpudev="''${tmpl_udev}.in"
+    finaludev="$tmpl_udev"
+    "$out/bin/rivalcfg" --print-udev > "$tmpudev"
+    substitute "$tmpudev" "$out/lib/udev/rules.d/99-rivalcfg.rules" \
+      --replace MODE=\"0666\" "MODE=\"0664\", GROUP=\"input\""
+    rm "$tmpudev"
   '';
 
   meta = with lib; {
     description = "Utility program that allows you to configure SteelSeries Rival gaming mice";
     homepage = "https://github.com/flozz/rivalcfg";
-    license     = licenses.wtfpl;
+    license = licenses.wtfpl;
     maintainers = with maintainers; [ ornxka ];
   };
 }
diff --git a/pkgs/misc/rivalcfg/rival.rules b/pkgs/misc/rivalcfg/rival.rules
deleted file mode 100644
index c7c2c8fee589..000000000000
--- a/pkgs/misc/rivalcfg/rival.rules
+++ /dev/null
@@ -1,242 +0,0 @@
-# Generated by rivalcfg v4.8.0
-# Do not edit this file. It can be regenerated with the following command:
-# 
-#     rivalcfg --update-udev
-
-# SteelSeries Aerox 3
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1836", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1836", MODE="0666"
-
-# SteelSeries Aerox 3 Wireless (wired mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="183a", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="183a", MODE="0666"
-
-# SteelSeries Aerox 3 Wireless (2.4 GHz wireless mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1838", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1838", MODE="0666"
-
-# SteelSeries Aerox 5 Wireless (wired mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1854", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1854", MODE="0666"
-
-# SteelSeries Aerox 5 Wireless (2.4 GHz wireless mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1852", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1852", MODE="0666"
-
-# SteelSeries Aerox 9 Wireless (wired mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="185a", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="185a", MODE="0666"
-
-# SteelSeries Aerox 9 Wireless (2.4 GHz wireless mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1858", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1858", MODE="0666"
-
-# SteelSeries Kana v2
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="137a", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="137a", MODE="0666"
-
-# SteelSeries Kinzu v2
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1366", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1366", MODE="0666"
-
-# SteelSeries Kinzu v2
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1378", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1378", MODE="0666"
-
-# SteelSeries Prime
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="182e", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="182e", MODE="0666"
-
-# SteelSeries Prime Rainbow 6 Siege Black Ice Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="182a", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="182a", MODE="0666"
-
-# SteelSeries Prime CS:GO Neo Noir Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1856", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1856", MODE="0666"
-
-# SteelSeries Prime Wireless (wired mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1842", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1842", MODE="0666"
-
-# SteelSeries Prime Wireless (2.4 GHz wireless mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1840", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1840", MODE="0666"
-
-# SteelSeries Rival 3
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1824", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1824", MODE="0666"
-
-# SteelSeries Rival 3 (firmware v0.37.0.0)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="184c", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="184c", MODE="0666"
-
-# SteelSeries Rival 3 Wireless (2.4 GHz mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1830", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1830", MODE="0666"
-
-# SteelSeries Rival 95
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1706", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1706", MODE="0666"
-
-# SteelSeries Rival 95 MSI Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1707", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1707", MODE="0666"
-
-# SteelSeries Rival 95 PC Bang
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1704", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1704", MODE="0666"
-
-# SteelSeries Rival 100 PC Bang
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1708", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1708", MODE="0666"
-
-# SteelSeries Rival 100
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1702", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1702", MODE="0666"
-
-# SteelSeries Rival 100 (Dell China)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170a", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170a", MODE="0666"
-
-# SteelSeries Rival 100 Dota 2 Edition (retail)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170b", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170b", MODE="0666"
-
-# SteelSeries Rival 100 Dota 2 Edition (Lenovo)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170c", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170c", MODE="0666"
-
-# SteelSeries Rival 105
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1814", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1814", MODE="0666"
-
-# SteelSeries Rival 110
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1729", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1729", MODE="0666"
-
-# SteelSeries Rival 106
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1816", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1816", MODE="0666"
-
-# SteelSeries Rival
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1384", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1384", MODE="0666"
-
-# SteelSeries Rival Dota 2 Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1392", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1392", MODE="0666"
-
-# SteelSeries Rival 300
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1710", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1710", MODE="0666"
-
-# SteelSeries Rival 300 Fallout 4 Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1712", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1712", MODE="0666"
-
-# SteelSeries Rival 300 Evil Geniuses Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="171c", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="171c", MODE="0666"
-
-# SteelSeries Rival 300 CS:GO Fade Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1394", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1394", MODE="0666"
-
-# SteelSeries Rival 300 CS:GO Hyper Beast Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="171a", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="171a", MODE="0666"
-
-# SteelSeries Rival 300 CS:GO Fade Edition (stm32)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1716", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1716", MODE="0666"
-
-# SteelSeries Rival 300 Acer Predator Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1714", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1714", MODE="0666"
-
-# SteelSeries Rival 300 HP OMEN Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1718", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1718", MODE="0666"
-
-# SteelSeries Rival 300S
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1810", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1810", MODE="0666"
-
-# SteelSeries Rival 310
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1720", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1720", MODE="0666"
-
-# SteelSeries Rival 310 CS:GO Howl Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="171e", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="171e", MODE="0666"
-
-# SteelSeries Rival 310 PUBG Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1736", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1736", MODE="0666"
-
-# SteelSeries Rival 500
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170e", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="170e", MODE="0666"
-
-# SteelSeries Rival 600
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1724", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1724", MODE="0666"
-
-# SteelSeries Rival 600 Dota 2 Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="172e", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="172e", MODE="0666"
-
-# SteelSeries Rival 650 Wireless (wired mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="172b", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="172b", MODE="0666"
-
-# SteelSeries Rival 650 Wireless (2.4 GHz wireless mode)
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1726", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1726", MODE="0666"
-
-# SteelSeries Rival 700
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1700", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1700", MODE="0666"
-
-# SteelSeries Rival 710
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1730", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1730", MODE="0666"
-
-# SteelSeries Sensei 310
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1722", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1722", MODE="0666"
-
-# SteelSeries Sensei [RAW]
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1369", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1369", MODE="0666"
-
-# SteelSeries Sensei [RAW] Diablo III Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1362", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1362", MODE="0666"
-
-# SteelSeries Sensei [RAW] Guild Wars 2 Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="136d", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="136d", MODE="0666"
-
-# SteelSeries Sensei [RAW] CoD Black Ops II Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="136f", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="136f", MODE="0666"
-
-# SteelSeries Sensei [RAW] World of Tanks Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1380", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1380", MODE="0666"
-
-# SteelSeries Sensei [RAW] Heroes of the Storm Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1390", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1390", MODE="0666"
-
-# SteelSeries Sensei TEN
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1832", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1832", MODE="0666"
-
-# SteelSeries Sensei TEN CS:GO Neon Rider Edition
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1834", MODE="0666"
-SUBSYSTEM=="usb", ATTRS{idVendor}=="1038", ATTRS{idProduct}=="1834", MODE="0666"
-
-