pin "'PyQt6<6.7'"

.github/workflows/test_and_deploy.yml

@@ -30,11 +30,11 @@ jobs:
       matrix:
         platform: [ubuntu-latest, windows-latest, macos-13]
         python-version: ["3.8", "3.9", "3.10", "3.11"]
-        backend: [pyqt5, pyside2, pyqt6]
+        backend: [pyqt5, pyside2, "'PyQt6<6.7'"]
         exclude:
           # Abort (core dumped) on linux pyqt6, unknown reason
           - platform: ubuntu-latest
-            backend: pyqt6
+            backend: "'PyQt6<6.7'"
           # lack of wheels for pyside2/py3.11
           - python-version: "3.11"
             backend: pyside2
@@ -56,7 +56,7 @@ jobs:
 
           - python-version: "3.12"
             platform: macos-latest
-            backend: pyqt6
+            backend: "'PyQt6<6.7'"
 
           # legacy Qt
           - python-version: 3.8

pyproject.toml

@@ -68,7 +68,7 @@ pyside2 = ["pyside2"]
 # https://bugreports.qt.io/browse/PYSIDE-2627
 pyside6 = ["pyside6 !=6.5.0,!=6.5.1,!=6.6.2"]
 pyqt5 = ["pyqt5"]
-pyqt6 = ["pyqt6"]
+pyqt6 = ["pyqt6<6.7"]
 font-fa5 = ["fonticon-fontawesome5"]
 font-fa6 = ["fonticon-fontawesome6"]
 font-mi6 = ["fonticon-materialdesignicons6"]