Nixos rust iced, can't find Wayland library error

Masterflo3004 · March 13, 2025, 6:47pm

Hello,
I wanted to try the iced library for rust, but when I try to run the programm (it builds perfectly fine) using cargo run I get the error
thread 'main' panicked at /home/florian/.cargo/registry/src/index.crates.io-6f17d22bba15001f/iced_winit-0.13.0/src/program.rs:192:10: Create event loop: Os(OsError { line: 81, file: "/home/florian/.cargo/registry/src/index.crates.io-6f17d22bba15001f/winit-0.30.9/src/platform_impl/linux/wayland/event_loop/mod.rs", error: WaylandError(Connection(NoWaylandLib)) }) note: run with RUST_BACKTRACE=1 environment variable to display a backtrace.
So my question is, if it is possible to simply run the programm using cargo run or do I have to build the project into a nix os package everytime.
Thank you very much
masterflo3004

jtojnar · March 13, 2025, 7:03pm

The dependencies of iced tend to dlopen stuff (e.g. wayland-rs). You need to run the program inside a nix-shell:

github.com

iced-rs/iced/blob/fd5ed0d0a6e84b3c036ff8e1f0d62d383d4b1e82/DEPENDENCIES.md#nixos

# Dependencies

Iced requires some system dependencies to work, and not
all operating systems come with them installed.

You can follow the provided instructions for your system to
get them, if your system isn't here, add it!

## NixOS

You can add this `shell.nix` to your project and use it by running `nix-shell`:

```nix
{ pkgs ? import <nixpkgs> {} }:

pkgs.mkShell rec {
  buildInputs = with pkgs; [
    expat
    fontconfig
    freetype

This file has been truncated. show original

Masterflo3004 · March 13, 2025, 7:04pm

thank you very much. I will try this.

max · March 13, 2025, 9:08pm

Not a single day goes by without Rust people being embarrassingly bad at dealing with graphics libraries. I took some time to improve their devShell, see here:

github.com

max-privatevoid/iced/blob/32d007be56a829cdcf2348c023a27dd14b4d36d5/DEPENDENCIES.md#nixos

# Dependencies

Iced requires some system dependencies to work, and not
all operating systems come with them installed.

You can follow the provided instructions for your system to
get them, if your system isn't here, add it!

## NixOS

You can add this `shell.nix` to your project and use it by running `nix-shell`:

```nix
{ pkgs ? import <nixpkgs> { } }:

let
  dlopenLibraries = with pkgs; [
    libxkbcommon

    # GPU backend

This file has been truncated. show original

PR to upstream repo