While working on [reproducible builds](https://reproducible-builds.org/) for [openSUSE](https://en.opensuse.org/openSUSE:Reproducible_Builds), I found that our `OpenRGB-0.9` package produces strange variations in `60-openrgb.rules` ```diff --- old/usr/lib/udev/rules.d/60-openrgb.rules 2023-09-07 02:00:00.000000000 +0200 +++ new/usr/lib/udev/rules.d/60-openrgb.rules 2023-09-07 02:00:00.000000000 +0200 @@ -738,7 +738,7 @@ SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="4087", TAG+="uaccess", TAG+="Logitech_G903_Hero_Wireless_Gaming_Mouse" SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="4079", TAG+="uaccess", TAG+="Logitech_G_Pro_Wireless_Gaming_Mouse" SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="405f", TAG+="uaccess", TAG+="Logitech_Powerplay_Mat" -SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c539", TAG+="uaccess", TAG+="Logitech_G_Lightspeed_Receiver" +SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="0951", ATTRS{idProduct}=="1741", TAG+="uaccess", TAG+="HyperX_Pulsefire_Mat_RGB_Mouse_Pad_XL" SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c53a", TAG+="uaccess", TAG+="Logitech_Powerplay_Mat_Receiver" #---------------------------------------------------------------# # Logitech Lightspeed - DetectLogitechWired @@ -1080,7 +1080,7 @@ #---------------------------------------------------------------# # NZXT Hue+ - DetectNZXTHuePlusControllers #---------------------------------------------------------------# -SUBSYSTEMS=="serial|hidraw", ATTRS{idVendor}=="03f0", ATTRS{idProduct}=="098c", TAG+="uaccess", TAG+="HyperX_DuoCast" +SUBSYSTEMS=="serial|hidraw", ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="00df", TAG+="uaccess", TAG+="NZXT_Hue" #---------------------------------------------------------------# ``` or even ```diff --- old/usr/lib/udev/rules.d/60-openrgb.rules 2023-09-07 02:00:00.000000000 +0200 +++ new/usr/lib/udev/rules.d/60-openrgb.rules 2023-09-07 02:00:00.000000000 +0200 @@ -202,7 +202,7 @@ #---------------------------------------------------------------# # Blinky Tape - DetectBlinkyTapeControllers #---------------------------------------------------------------# -SUBSYSTEMS=="serial|hidraw", ATTRS{idVendor}=="306f", ATTRS{idProduct}=="1234", TAG+="uaccess", TAG+="JSAUX_RGB_Docking_Station" +SUBSYSTEMS=="serial|hidraw", ATTRS{idVendor}=="1d50", ATTRS{idProduct}=="605e", TAG+="uaccess", TAG+="BlinkyTape" #---------------------------------------------------------------# # Cherry Keyboard - DetectCherryKeyboards #---------------------------------------------------------------# @@ -738,7 +738,7 @@ SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="4087", TAG+="uaccess", TAG+="Logitech_G903_Hero_Wireless_Gaming_Mouse" SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="4079", TAG+="uaccess", TAG+="Logitech_G_Pro_Wireless_Gaming_Mouse" SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="405f", TAG+="uaccess", TAG+="Logitech_Powerplay_Mat" -SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c539", TAG+="uaccess", TAG+="Logitech_G_Lightspeed_Receiver" +SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="vid", ATTRS{idProduct}=="pid", TAG+="uaccess", TAG+="name" SUBSYSTEMS=="usb|hidraw", ATTRS{idVendor}=="046d", ATTRS{idProduct}=="c53a", TAG+="uaccess", TAG+="Logitech_Powerplay_Mat_Receiver" #---------------------------------------------------------------# # Logitech Lightspeed - DetectLogitechWired ``` I found that variations do not happen, when building on a 1-core-VM with a filesystem that has deterministic readdir order. That might give a hint on the source of the issue.