Pkgconfig available in dev shell but not when building

SKyletoft · March 16, 2022, 10:40pm

SKyletoft/gtk4_test/blob/e5745d4eebd3ae45e4b476a7a2fe8ec213e2c66b/flake.nix

{
	description = "A very basic flake";

	inputs = {
		nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
		flake-utils.url = "github:numtide/flake-utils";
	};

	outputs = { self, nixpkgs, flake-utils }:
		flake-utils.lib.eachDefaultSystem(system:
			let pkgs = nixpkgs.legacyPackages.${system};
			in rec {
				gtk4_test = pkgs.rustPlatform.buildRustPackage {
					pname = "gtk4_test";
					version = "0.0.1";
					src = self;
					cargoSha256 = "sha256-ah8IjShmivS6IWL3ku/4/j+WNr/LdUnh1YJnPdaFdcM=";
					cargoLock.lockFile = "${self}/Cargo.lock";
					buildInputs = with pkgs; [ pkg-config ];
					nativeBuildInputs = with pkgs; [ gtk4 libadwaita pkg-config ];

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I’m trying to build the relm4 demo. If I open a shell with nix develop and build with cargo build --release like a normal rust project it works fine. If I instead try to build or run through nix with nix build or nix run it cannot find pkgconfig and fails to compile.

But pkgconfig is right there, in both buildInputs and nativeBuildInputs and the dev shell version just copies the build version of the variables.

What?!

jtojnar · March 16, 2022, 11:00pm

You have nativeBuildInputs and buildInputs swapped – in short, nativeBuildInputs is for build tools and buildInputs is for runtime dependencies. buildRustPackage enables strictDeps = true; by default, so it will enforce the distinction.

SKyletoft · March 16, 2022, 11:12pm

Ah, perfect

Thank you