use nixpkgs-unstable pixi

modules/languages/python.nix

@@ -6,7 +6,6 @@
 }: let
   inherit (lib) mkIfIn;
   cfg = config.oizys.languages;
-  pixi = pkgs.callPackage ../../pkgs/pixi.nix {};
 in {
   config = mkIfIn "python" cfg {
     environment.systemPackages = let

pkgs/pixi.nix

@@ -1,76 +0,0 @@
-{ lib
-, stdenv
-, rustPlatform
-, fetchFromGitHub
-, pkg-config
-, openssl
-, installShellFiles
-, darwin
-, testers
-, pixi
-}:
-
-rustPlatform.buildRustPackage rec {
-  pname = "pixi";
-  version = "0.15.2";
-
-  src = fetchFromGitHub {
-    owner = "prefix-dev";
-    repo = "pixi";
-    rev = "v${version}";
-    hash = "sha256-bh8Uu6Q2AND50Qzivc6k1Z8JWudkHC2i4YW1Hxa69SM=";
-  };
-
-  cargoHash = "sha256-yMIcPwnuN7F2ZrOtJw8T+nxeSzLsYn+iC34bYeWpi/w=";
-
-  nativeBuildInputs = [
-    pkg-config
-    installShellFiles
-  ];
-
-  buildInputs = [
-    openssl
-  ]
-  ++ lib.optionals stdenv.isDarwin (
-    with darwin.apple_sdk_11_0.frameworks; [ CoreFoundation IOKit SystemConfiguration Security ]
-  );
-
-  # There are some CI failures with Rattler. Tests on Aarch64 has been skipped.
-  # See https://github.com/prefix-dev/pixi/pull/241.
-  doCheck = !stdenv.isAarch64;
-
-  preCheck = ''
-    export HOME="$(mktemp -d)"
-  '';
-
-  checkFlags = [
-    # Skip tests requiring network
-    "--skip=add_channel"
-    "--skip=add_functionality"
-    "--skip=add_functionality_os"
-    "--skip=add_functionality_union"
-    "--skip=add_pypi_functionality"
-    "--skip=test_alias"
-    "--skip=test_cwd"
-    "--skip=test_incremental_lock_file"
-  ];
-
-  postInstall = ''
-    installShellCompletion --cmd pix \
-      --bash <($out/bin/pixi completion --shell bash) \
-      --fish <($out/bin/pixi completion --shell fish) \
-      --zsh <($out/bin/pixi completion --shell zsh)
-  '';
-
-  passthru.tests.version = testers.testVersion {
-    package = pixi;
-  };
-
-  meta = with lib; {
-    description = "Package management made easy";
-    homepage = "https://pixi.sh/";
-    license = licenses.bsd3;
-    maintainers = with lib.maintainers; [ aaronjheng edmundmiller ];
-    mainProgram = "pixi";
-  };
-}