python3Packages.echo: use pyproject, unbreak, enable tests (#439962)

pkgs/development/python-modules/echo/default.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  stdenv,
   buildPythonPackage,
   fetchFromGitHub,
   pythonOlder,
@@ -10,6 +11,7 @@
   qt6,
   qtpy,
   pyqt6,
+  mesa,
   pytestCheckHook,
   pytest-cov-stub,
 }:
@@ -17,9 +19,9 @@
 buildPythonPackage rec {
   pname = "echo";
   version = "0.11.0";
-  format = "setuptools";
+  pyproject = true;
 
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.10";
 
   src = fetchFromGitHub {
     owner = "glue-viz";
@@ -28,15 +30,18 @@ buildPythonPackage rec {
     sha256 = "sha256-Uikzn9vbLctiZ6W0uA6hNvr7IB/FhCcHk+JxBW7yrA4=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     setuptools
     setuptools-scm
+  ];
+
+  nativeBuildInputs = [
     qt6.wrapQtAppsHook
   ];
 
   buildInputs = lib.optionals (pythonOlder "3.9") [ libxcrypt ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     qt6.qtconnectivity
     qt6.qtbase
     qt6.qttools
@@ -45,11 +50,14 @@ buildPythonPackage rec {
     qtpy
   ];
 
-  # collecting ... qt.qpa.xcb: could not connect to display
-  # qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
-  doCheck = false;
+  doCheck = lib.meta.availableOn stdenv.hostPlatform mesa.llvmpipeHook;
+
+  preCheck = ''
+    export QT_QPA_PLATFORM=offscreen
+  '';
 
   nativeCheckInputs = [
+    mesa.llvmpipeHook
     pytestCheckHook
     pytest-cov-stub
   ];

pkgs/top-level/python-packages.nix

@@ -4571,7 +4571,9 @@ self: super: with self; {
 
   ecdsa = callPackage ../development/python-modules/ecdsa { };
 
-  echo = callPackage ../development/python-modules/echo { };
+  echo = callPackage ../development/python-modules/echo {
+    inherit (pkgs) mesa;
+  };
 
   ecoaliface = callPackage ../development/python-modules/ecoaliface { };