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
          ];
        };
      };
    };

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
];
};
};
};