Casual NixOS user here since a few odd years, barely know the Nix lang, didn’t package a single piece of software.

Switched to Lix, braced myself for the regressions, thinking lI’ll roll back immediately if anything important doesn’t work”, and it was seamless. Nothing broke, except a single program I built using a nix-shell script. Re-ran the script and it was fine.

does anybody have experience with the rpi4 and screens?

https://github.com/nvmd/nixos-raspberrypi

Hello,

I have been having issues the past few months with using https://www.waveshare.com/wiki/5inch_DSI_LCD on Raspberry Pi 4 with NixOS.
I don't even know anymore what would cause libinput to not recognize the device?
I have imported all the modules and added

hardware.raspberry-pi.config.all.dt-overlays.vc4-kms-dsi-waveshare-800x480enable = true;

# Do not edit!
# This configuration file is generated from NixOS configuration
# options `hardware.raspberry-pi.config`.
# Any manual changes will be overwritten on the next configuration
# switch.
[all]
arm_64bit=1
arm_boost=1
avoid_warnings=1
camera_auto_detect=1
disable_fw_kms_setup=1
disable_overscan=1
display_auto_detect=1
enable_uart=1
kernel=u-boot-rpi-arm64.bin
max_framebuffers=2
dtparam=audio=on
dtoverlay=vc4-kms-dsi-waveshare-800x480
dtoverlay=
dtoverlay=vc4-kms-v3d
dtoverlay=

[cm4]
otg_mode=1

[cm5]
dtoverlay=dwc2
dtparam=dr_mode=host
dtoverlay=

[root@cedarix:~]# ls -al /dev/input/
total 0
drwxr-xr-x  2 root root      60 Jan  1  1970 .
drwxr-xr-x 19 root root    3960 Nov  2 14:14 ..
crw-rw----  1 root input 13, 63 Nov  2 14:14 mice

Hey Everyone, I'd like to request help and hope this is the right place to ask.

Problem

I've been encountering a cmake error when trying to switch to a new generation (just updates to packages from updated nixpkgs), and am aware this is being tracked here, but I'm wondering what I can do right now. Because, frankly, I can't update any of my packages as long as I get this error. And I can imagine that many users are facing this issue.

The error in short:

 > CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
       >   Compatibility with CMake < 3.5 has been removed from CMake.
       >
       >   Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
       >   to tell CMake that the project requires at least <min> but has been updated
       >   to work with policies introduced by <max> or earlier.
       >
       >   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
       >
       >
       > -- Configuring incomplete, errors occurred!
       For full logs, run 'nix log /nix/store/4w4b558kk5m3ij11ycxbm4pry3ss6m45-capnproto-1.0.2.drv'.
error: 1 dependencies of derivation '/nix/store/pfkvpc5is5yvdhrw6p14dm8m64lq28mb-lix-2.93.3-pre20250722-7ac20fc.drv' failed to build

What I've tried

I've tried to use a overlay for capnproto, but even though the overlay is seen by nix repl, it's not being applied. After trying for an hour last weekend, I gave up on that route.

Any advice? Thanks in advance!
I've tried

Hey Everyone, I'd like to request help and hope this is the right place to ask. Feel free to redirect me to a more appropriate place.

Problem

I've been encountering a cmake error when trying to switch to a new generation (just updates to packages from updated nixpkgs), and am aware this is being tracked here, but I'm wondering what I can do right now. Because, frankly, I can't update any of my packages as long as I get this error. And I can imagine that many users are facing this issue.

The error in short:

 > CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
       >   Compatibility with CMake < 3.5 has been removed from CMake.
       >
       >   Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
       >   to tell CMake that the project requires at least <min> but has been updated
       >   to work with policies introduced by <max> or earlier.
       >
       >   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
       >
       >
       > -- Configuring incomplete, errors occurred!
       For full logs, run 'nix log /nix/store/4w4b558kk5m3ij11ycxbm4pry3ss6m45-capnproto-1.0.2.drv'.
error: 1 dependencies of derivation '/nix/store/pfkvpc5is5yvdhrw6p14dm8m64lq28mb-lix-2.93.3-pre20250722-7ac20fc.drv' failed to build

What I've tried

I've tried to use a overlay for capnproto, but even though the overlay is seen by nix repl, it's not being applied. After trying for an hour last weekend, I gave up on that route.

Any advice? Thanks in advance!
I've tried

Hey Everyone, I'd like to request help and hope this is the right place to ask. Feel free to redirect me to a more appropriate place.

Problem

I've been encountering a cmake error when trying to switch to a new generation (just updates to packages from updated nixpkgs), and am aware this is being tracked here, but I'm wondering what I can do right now. Because, frankly, I can't update any of my packages as long as I get this error. And I can imagine that many users are facing this issue.

The error in short:

 > CMake Error at CMakeLists.txt:1 (cmake_minimum_required):
       >   Compatibility with CMake < 3.5 has been removed from CMake.
       >
       >   Update the VERSION argument <min> value.  Or, use the <min>...<max> syntax
       >   to tell CMake that the project requires at least <min> but has been updated
       >   to work with policies introduced by <max> or earlier.
       >
       >   Or, add -DCMAKE_POLICY_VERSION_MINIMUM=3.5 to try configuring anyway.
       >
       >
       > -- Configuring incomplete, errors occurred!
       For full logs, run 'nix log /nix/store/4w4b558kk5m3ij11ycxbm4pry3ss6m45-capnproto-1.0.2.drv'.
error: 1 dependencies of derivation '/nix/store/pfkvpc5is5yvdhrw6p14dm8m64lq28mb-lix-2.93.3-pre20250722-7ac20fc.drv' failed to build

What I've tried

I've tried to use a overlay for capnproto, but even though the overlay is seen by nix repl, it's not being applied. After trying for an hour last weekend, I gave up on that route.

Any advice? Thanks in advance!
Tobias

Flake input

  inputs = {  inputs.nixpkgs.follows = "nixpkgs";
    };
    lix-module = {
      url = "https://git.lix.systems/lix-project/nixos-module/archive/2.93.3-1.tar.gz";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

output:

  outputs = { self, nixpkgs, home-manager, lix-module } @ inputs:
    {
      [...]
      nixosConfigurations = {
        nixos-tobias = lib.nixosSystem {
          inherit system;
          specialArgs = {inherit inputs outputs;};
          modules = with self.nixosModules; [
            [...]
            lix-module.nixosModules.default
          ];
        };
      };
    };