# Is there an issue with Linux builds currently?

**URL:** <https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743>\
**Category:** Support\
**Created:** [July 16, 2025, 3:13pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743 "2025-07-16T15:13:10Z")\
**Posts on this page:** 14\
**Page:** 1

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 16, 2025, 3:13pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/1 "2025-07-16T15:13:10Z")

</div>

Hello,

There are no Linux builds for Slicer preview and no extensions since a few days.

Slicer clean-built today (`e1881207`) on Arch runs (`--ignore-slicerrc`) suspiciously with the following in stdout:

```auto
QFont::fromString: Invalid description 'Noto Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
Traceback (most recent call last):
  File "<string>", line 5, in <module>
  File "<string>", line 212, in <module>
  File "<string>", line 177, in __init__
AttributeError: module 'qt' has no attribute 'QTimer'
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/CropVolumeSequence.py", line 24, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["CropVolumeSequence"] - Failed to instantiate scripted pythonqt class "CropVolumeSequence" 0x55a11b00b450
Fail to instantiate module "CropVolumeSequence"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOM.py", line 12, in <module>
    import DICOMLib
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOM.py" as module "DICOM" !
Fail to instantiate module "DICOM"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMEnhancedUSVolumePlugin.py", line 5, in <module>
    from DICOMLib import DICOMPlugin
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMEnhancedUSVolumePlugin.py" as module "DICOMEnhancedUSVolumePlugin" !
Fail to instantiate module "DICOMEnhancedUSVolumePlugin"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMGeAbusPlugin.py", line 11, in <module>
    from DICOMLib import DICOMPlugin
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMGeAbusPlugin.py" as module "DICOMGeAbusPlugin" !
Fail to instantiate module "DICOMGeAbusPlugin"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMImageSequencePlugin.py", line 9, in <module>
    from DICOMLib import DICOMPlugin
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMImageSequencePlugin.py" as module "DICOMImageSequencePlugin" !
Fail to instantiate module "DICOMImageSequencePlugin"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMPatcher.py", line 24, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["DICOMPatcher"] - Failed to instantiate scripted pythonqt class "DICOMPatcher" 0x55a11b0223f0
Fail to instantiate module "DICOMPatcher"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMScalarVolumePlugin.py", line 13, in <module>
    from DICOMLib import DICOMPlugin
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMScalarVolumePlugin.py" as module "DICOMScalarVolumePlugin" !
Fail to instantiate module "DICOMScalarVolumePlugin"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMSlicerDataBundlePlugin.py", line 8, in <module>
    from DICOMLib import DICOMPlugin
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMSlicerDataBundlePlugin.py" as module "DICOMSlicerDataBundlePlugin" !
Fail to instantiate module "DICOMSlicerDataBundlePlugin"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMVolumeSequencePlugin.py", line 9, in <module>
    from DICOMLib import DICOMPlugin
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DICOMVolumeSequencePlugin.py" as module "DICOMVolumeSequencePlugin" !
Fail to instantiate module "DICOMVolumeSequencePlugin"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/DataProbe.py", line 41, in __init__
    if not slicer.app.commandOptions().noMainWindow:
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: qSlicerCommandOptions has no attribute named 'noMainWindow'
qSlicerPythonCppAPI::instantiateClass - ["DataProbe"] - Failed to instantiate scripted pythonqt class "DataProbe" 0x55a11b63dc60
Fail to instantiate module "DataProbe"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/ExtensionWizard.py", line 14, in <module>
    from ExtensionWizardLib import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/ExtensionWizardLib/ __init__.py", line 4, in <module>
    from .DirectoryListWidget import DirectoryListWidget
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/ExtensionWizardLib/DirectoryListWidget.py", line 36, in <module>
    class DirectoryListWidget(qt.QWidget):
                              ^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QWidget'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/ExtensionWizard.py" as module "ExtensionWizard" !
Fail to instantiate module "ExtensionWizard"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/LandmarkRegistration.py", line 14, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["LandmarkRegistration"] - Failed to instantiate scripted pythonqt class "LandmarkRegistration" 0x55a11b79e340
Fail to instantiate module "LandmarkRegistration"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/MultiVolumeImporterPlugin.py", line 5, in <module>
    import DICOMLib
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/ __init__.py", line 1, in <module>
    from .DICOMProcesses import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 39, in <module>
    class DICOMProcess:
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/DICOMLib/DICOMProcesses.py", line 85, in DICOMProcess
    def start(self, cmd: str, args: list[str]) -> qt.QProcess:
                                                  ^^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QProcess'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/MultiVolumeImporterPlugin.py" as module "MultiVolumeImporterPlugin" !
Fail to instantiate module "MultiVolumeImporterPlugin"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/SampleData.py", line 102, in __init__
    if not slicer.app.commandOptions().noMainWindow:
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: qSlicerCommandOptions has no attribute named 'noMainWindow'
qSlicerPythonCppAPI::instantiateClass - ["SampleData"] - Failed to instantiate scripted pythonqt class "SampleData" 0x55a11b8fa740
Fail to instantiate module "SampleData"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/ScreenCapture.py", line 25, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["ScreenCapture"] - Failed to instantiate scripted pythonqt class "ScreenCapture" 0x55a11b891f80
Fail to instantiate module "ScreenCapture"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/SegmentEditor.py", line 13, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["SegmentEditor"] - Failed to instantiate scripted pythonqt class "SegmentEditor" 0x55a11b925d60
Fail to instantiate module "SegmentEditor"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/SegmentStatistics.py", line 281, in <module>
    class SegmentStatisticsParameterEditorDialog(qt.QDialog):
                                                 ^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QDialog'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/SegmentStatistics.py" as module "SegmentStatistics" !
Fail to instantiate module "SegmentStatistics"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/SimpleFilters.py", line 69, in __init__
    parent.icon = qt.QIcon("%s/ITK.png" % self.ICON_DIR)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["SimpleFilters"] - Failed to instantiate scripted pythonqt class "SimpleFilters" 0x55a11b97fdc0
Fail to instantiate module "SimpleFilters"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/SurfaceToolbox.py", line 18, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["SurfaceToolbox"] - Failed to instantiate scripted pythonqt class "SurfaceToolbox" 0x55a11b9b86c0
Fail to instantiate module "SurfaceToolbox"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap_external>", line 999, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/VectorToScalarVolume.py", line 12, in <module>
    from slicer.parameterNodeWrapper import parameterNodeWrapper
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/ __init__.py", line 6, in <module>
    from .guiConnectors import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/guiConnectors.py", line 19, in <module>
    from . import parameterPack as pack
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/parameterPack.py", line 11, in <module>
    from .serializers import (
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/serializers.py", line 424, in <module>
    class QColorSerializer(Serializer):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/serializers.py", line 444, in QColorSerializer
    def write(self, parameterNode, name: str, value : qt.QColor) -> None:
                                                      ^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QColor'
loadSourceAsModule - Failed to load file "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/VectorToScalarVolume.py" as module "VectorToScalarVolume" !
Fail to instantiate module "VectorToScalarVolume"
Traceback (most recent call last):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/../lib/Slicer-5.9/qt-scripted-modules/WebServer.py", line 30, in __init__
    ScriptedLoadableModule. __init__ (self, parent)
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/ScriptedLoadableModule.py", line 41, in __init__
    parent.icon = qt.QIcon(iconPath)
                  ^^^^^^^^
AttributeError: module 'qt' has no attribute 'QIcon'
qSlicerPythonCppAPI::instantiateClass - ["WebServer"] - Failed to instantiate scripted pythonqt class "WebServer" 0x55a11ba5e7c0
Fail to instantiate module "WebServer"
The following modules failed to be instantiated:
   DICOMEnhancedUSVolumePlugin
   SampleData
   DICOMVolumeSequencePlugin
   DICOMSlicerDataBundlePlugin
   SurfaceToolbox
   CropVolumeSequence
   DICOM
   WebServer
   SegmentEditor
   ScreenCapture
   ExtensionWizard
   LandmarkRegistration
   SimpleFilters
   VectorToScalarVolume
   MultiVolumeImporterPlugin
   SegmentStatistics
   DICOMGeAbusPlugin
   DICOMScalarVolumePlugin
   DataProbe
   DICOMImageSequencePlugin
   DICOMPatcher
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/SubjectHierarchyLib/ __init__.py", line 3, in <module>
    from . import parameterNodeWrapper # Required to ensure parameterNodeWrapper plugins are registered
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/SubjectHierarchyLib/parameterNodeWrapper/ __init__.py", line 3, in <module>
    from .guiConnectors import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/SubjectHierarchyLib/parameterNodeWrapper/guiConnectors.py", line 2, in <module>
    from slicer.parameterNodeWrapper import (
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/ __init__.py", line 6, in <module>
    from .guiConnectors import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/guiConnectors.py", line 19, in <module>
    from . import parameterPack as pack
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/parameterPack.py", line 11, in <module>
    from .serializers import (
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/serializers.py", line 424, in <module>
    class QColorSerializer(Serializer):
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/bin/Python/slicer/parameterNodeWrapper/serializers.py", line 444, in QColorSerializer
    def write(self, parameterNode, name: str, value : qt.QColor) -> None:
                                                      ^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QColor'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/SegmentEditorEffects/ __init__.py", line 16, in <module>
    from .SegmentEditorThresholdEffect import *
  File "/opt/programs/Slicer-5.9.0-2025-07-16-linux-amd64/lib/Slicer-5.9/qt-scripted-modules/SegmentEditorEffects/SegmentEditorThresholdEffect.py", line 995, in <module>
    class HistogramEventFilter(qt.QObject):
                               ^^^^^^^^^^
AttributeError: module 'qt' has no attribute 'QObject'
Switch to module: "Volumes"
Wayland does not support QWindow::requestActivate()
Switch to module: ""
Switch to module: ""

```

It’s not usable obviously.

Are there know issues for Linux builds? May we expect ‘business as usual’ soon?

Thank you.

---

<div class="post-metadata">

**Author:** ![jamesobutler](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jamesobutler/32/7511_2.png) [@jamesobutler](https://discourse.slicer.org/u/jamesobutler)\
**Post date:** [July 17, 2025, 12:25am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/2 "2025-07-17T00:25:52Z")

</div>

See the following details below. It appears there may be an issue specific to Linux builds that is not being observed for Windows or macOS builds.

> <https://github.com/Slicer/Slicer/pull/8565>
>
> This reverts commit 3bace0b4b6 ("ENH: Update Python initialization to use PyConf…ig API", 2025-07-03)
> 
> The commit replaced the deprecated \`Py\_NoUserSiteDirectory\` global flag with \`PyConfig\`-based initialization (PEP 587). While forward-looking, the change caused Slicer to fail at startup due to broken PythonQt integration. For example, \`qt.QTimer\` and \`qt.QIcon\` became unavailable.
> 
> Additionally, over 100 Python and C++ tests fail (\`ctest\`) due to incomplete or incorrect initialization of the embedded interpreter.
> 
> Until proper support for \`PyConfig\` is implemented in coordination with PythonQt, this reverts to using \`Py\_NoUserSiteDirectory\` to restore expected behavior.

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 17, 2025, 8:26am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/3 "2025-07-17T08:26:14Z")

</div>

Thanks for the link. After reverting the referenced commit, Slicer builds and runs fine.

(There’s a new issue regarding VMTK and ITK, that’s another headache.)

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 17, 2025, 6:05pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/4 "2025-07-17T18:05:31Z")

</div>

Thanks for your patience 🙏

A pull request fixing the python initialization has just been published 🚀

See [PR#8582](https://github.com/Slicer/Slicer/pull/8582)

* * *

Fixes regression introduced in:

- [7a26aa1](https://github.com/Slicer/Slicer/commit/7a26aa1b8748f1813d7206a9911c90987d563ad2) (“ENH: Update Python initialization for compatibility with isolated mode”)
- [3bace0b](https://github.com/Slicer/Slicer/commit/3bace0b4b61a1feaed10bdfd407d6fe0d07948c4) (“ENH: Update Python initialization to use PyConfig API”)

These changes inadvertently introduced multiple and inconsistent Python initializations by removing the use of deprecated symbols (`PySys_SetArgvEx`, `Py_NoUserSiteDirectory`) without fully replicating their intended behavior. As a result, over 100 tests failed (e.g., `AttributeError: module 'qt' has no attribute 'QTimer'` on Ubuntu) due to Python being initialized both too late and with conflicting settings.

This commit restores correct initialization behavior by:

1. Initializing Python early in `qSlicerCorePythonManager` using the `PyConfig` API. Rather than explicitly setting `config.isolated = 0`, this relies on the default (non-isolated) mode established by `Py_InitializeFromConfig`, which ensures that environment variables and site directories are respected. Early initialization ensures Python is ready before QApplication starts.
2. Preventing re-initialization by `PythonQt` by setting the `PythonAlreadyInitialized` flag. The previously required clearing of the `IgnoreSiteModule` flag is no longer necessary, as `PythonQt` no longer manages initialization.
3. Moving argument population (`PyConfig_SetArgv`) and interpreter config update (`_PyInterpreterState_SetConfig`) into `qSlicerCoreApplication::handleCommandLineArguments()` to occur after command-line arguments are fully known.

This approach ensures consistent interpreter state across embedded Python and PythonQt integration, and aligns with the best practices of the `PyConfig` API.

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 17, 2025, 6:07pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/5 "2025-07-17T18:07:33Z")

</div>

> [@chir.set](#):
>
> There’s a new issue regarding VMTK and ITK, that’s another headache.

Do you have more details about this ?

Also, I suggest you base your build on the linked pull request that should be integrated into `main` shortly.

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 17, 2025, 6:14pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/6 "2025-07-17T18:14:40Z")

</div>

For reference, here is the corresponding VMTK issue:

- [VMTK libs build failure · Issue #162 · vmtk/SlicerExtension-VMTK · GitHub](https://github.com/vmtk/SlicerExtension-VMTK/issues/162)

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 17, 2025, 6:31pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/7 "2025-07-17T18:31:07Z")

</div>

> [@jcfr](#):
>
> I suggest you base your build on the linked pull request that should be integrated into `main` shortly.

Thank you for considering both issues. My last build at `407906c367` does not yet include PR [8582](https://github.com/Slicer/Slicer/pull/8582).

I’ll keep you updated tomorrow.

Regards.

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 18, 2025, 7:23am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/8 "2025-07-18T07:23:07Z")

</div>

> [@chir.set](#):
>
> I’ll keep you updated tomorrow.

Unfortunately, Slicer does not start with a usable result when built at 533859698. The VMTK issue (related or not) persists.

Here is a trimmed `stdout` (too long for the editor) with `--ignore-slicerrc` from the build tree:

```auto
QFont::fromString: Invalid description 'Noto Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
Traceback (most recent call last):
  File "<string>", line 5, in <module>
  File "<string>", line 12, in <module>
  File "/home/arc/src/Slicer-SuperBuild9/Slicer-build/bin/Python/slicer/ __init__.py", line 218, in <module>
    import scipy.linalg # noqa: F401
    ^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/ __init__.py", line 205, in <module>
    from ._basic import *
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/_basic.py", line 13, in <module>
    from ._decomp import _asarray_validated
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/_decomp.py", line 26, in <module>
    from scipy._lib._util import _asarray_validated
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/_util.py", line 18, in <module>
    from scipy._lib._array_api import array_namespace
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/_array_api.py", line 17, in <module>
    from scipy._lib.array_api_compat import (
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/array_api_compat/numpy/ __init__.py", line 1, in <module>
    from numpy import *
  File "<frozen importlib._bootstrap>", line 1410, in _handle_fromlist
  File "<frozen importlib._bootstrap>", line 1412, in _handle_fromlist
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/ __init__.py", line 352, in __getattr__
    import numpy.testing as testing
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/ __init__.py", line 11, in <module>
    from ._private.utils import *
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/_private/utils.py", line 1393, in <module>
    _SUPPORTS_SVE = check_support_sve()
                    ^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/_private/utils.py", line 1387, in check_support_sve
    output = subprocess.run(cmd, capture_output=True, text=True)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 550, in run
    stdout, stderr = process.communicate(input, timeout=timeout)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 1209, in communicate
    stdout, stderr = self._communicate(input, endtime, timeout)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 2153, in _communicate
    stdout = self._translate_newlines(stdout,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 1086, in _translate_newlines
    data = data.decode(encoding, errors)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 12: ordinal not in range(128)
decoding with 'ANSI_X3.4-1968' codec failed
Traceback (most recent call last):
  File "<string>", line 1, in <module>
NameError: name 'getSlicerRCFileName' is not defined
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/arc/src/Slicer-SuperBuild9/Slicer-build/bin/Python/slicer/ __init__.py", line 218, in <module>
    import scipy.linalg # noqa: F401
    ^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/ __init__.py", line 205, in <module>
    from ._basic import *
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/_basic.py", line 13, in <module>
    from ._decomp import _asarray_validated
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/_decomp.py", line 26, in <module>
    from scipy._lib._util import _asarray_validated
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/_util.py", line 18, in <module>
    from scipy._lib._array_api import array_namespace
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/_array_api.py", line 17, in <module>
    from scipy._lib.array_api_compat import (
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/array_api_compat/numpy/ __init__.py", line 1, in <module>
    from numpy import *
  File "<frozen importlib._bootstrap>", line 1410, in _handle_fromlist
  File "<frozen importlib._bootstrap>", line 1412, in _handle_fromlist
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/ __init__.py", line 352, in __getattr__
    import numpy.testing as testing
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/ __init__.py", line 11, in <module>
    from ._private.utils import *
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/_private/utils.py", line 1393, in <module>
    _SUPPORTS_SVE = check_support_sve()
                    ^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/_private/utils.py", line 1387, in check_support_sve
    output = subprocess.run(cmd, capture_output=True, text=True)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 550, in run
    stdout, stderr = process.communicate(input, timeout=timeout)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 1209, in communicate
    stdout, stderr = self._communicate(input, endtime, timeout)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 2153, in _communicate
    stdout = self._translate_newlines(stdout,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 1086, in _translate_newlines
    data = data.decode(encoding, errors)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 12: ordinal not in range(128)
decoding with 'ANSI_X3.4-1968' codec failed
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/arc/src/Slicer-SuperBuild9/Slicer-build/bin/Python/slicer/ __init__.py", line 218, in <module>
    import scipy.linalg # noqa: F401
    ^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/ __init__.py", line 205, in <module>
    from ._basic import *
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/_basic.py", line 13, in <module>
    from ._decomp import _asarray_validated
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/linalg/_decomp.py", line 26, in <module>
    from scipy._lib._util import _asarray_validated
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/_util.py", line 18, in <module>
    from scipy._lib._array_api import array_namespace
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/_array_api.py", line 17, in <module>
    from scipy._lib.array_api_compat import (
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/scipy/_lib/array_api_compat/numpy/ __init__.py", line 1, in <module>
    from numpy import *
  File "<frozen importlib._bootstrap>", line 1410, in _handle_fromlist
  File "<frozen importlib._bootstrap>", line 1412, in _handle_fromlist
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/ __init__.py", line 352, in __getattr__
    import numpy.testing as testing
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/ __init__.py", line 11, in <module>
    from ._private.utils import *
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/_private/utils.py", line 1393, in <module>
    _SUPPORTS_SVE = check_support_sve()
                    ^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/site-packages/numpy/testing/_private/utils.py", line 1387, in check_support_sve
    output = subprocess.run(cmd, capture_output=True, text=True)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/subprocess.py", line 550, in run
    stdout, stderr = process.communicate(input, timeout=timeout)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

```

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 18, 2025, 1:24pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/9 "2025-07-18T13:24:02Z")

</div>

Here is the output when starting in `C.UTF-8` locale:

```auto
QT_QPA_PLATFORM="xcb" LANG=C.UTF-8 LC_ALL=C.UTF-8 src/Slicer-SuperBuild9/Slicer-build/Slicer
QFont::fromString: Invalid description 'Noto Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
Switch to module: "Volumes"
Loading Slicer RC file [/home/user/.slicerrc.py]
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<string>", line 129, in loadSlicerRCFile
  File "/home/arc/src/Slicer-SuperBuild9/python-install/lib/python3.12/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 22744: ordinal not in range(128)

```

If I add `--ignore-slicerrc`:

```auto
QFont::fromString: Invalid description 'Noto Sans,11,-1,5,400,0,0,0,0,0,0,0,0,0,0,1'
Switch to module: "Volumes"

```

(I don’t know yet if Slicer is usable since I’m currently doing that remotely.)

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 18, 2025, 1:40pm UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/10 "2025-07-18T13:40:34Z")

</div>

Further tests:

The default locale of the environment is `fr_FR.UTF-8`, which is the only locale active in `/etc/locale.gen`.

The bunch of decode errors before loading `.slicerrc.py` occur with the default locale in the environment or on the command line.

They do not appear with anything else : `{C,en_US,ar_BH,so_SO}.UTF-8`. None of these have been generated by `locale-gen` which is from the `glibc` package.

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 19, 2025, 9:51am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/11 "2025-07-19T09:51:31Z")

</div>

> [@chir.set](#):
>
> (I don’t know yet if Slicer is usable since I’m currently doing that remotely.)

@jcfr  
It’s usable, but like a disabled person.

It must be started with a locale that has not been generated for glibc. Modules are functional, even Python modules, but the rc file fails to load (a major limitation for me).

---

<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 22, 2025, 5:31am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/12 "2025-07-22T05:31:23Z")

</div>

Following the upgrade of the Linux build environment, the Preview build should be available for download tomorrow:

- [Slicer Build Environment Upgraded to `qt5-almalinux8-gcc14`](https://discourse.slicer.org/t/slicer-build-environment-upgraded-to-qt5-almalinux8-gcc14/43802)

---

<div class="post-metadata">

**Author:** ![chir.set](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/chir.set/32/66982_2.png) [@chir.set](https://discourse.slicer.org/u/chir.set)\
**Post date:** [July 22, 2025, 7:12am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/13 "2025-07-22T07:12:51Z")

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> [@jcfr](#):
>
> the Preview build should be available for download tomorrow:

Great and thanks @jcfr.

There’s still one last step [issue](https://slicer.cdash.org/viewBuildError.php?buildid=3870655) however.

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<div class="post-metadata">

**Author:** ![jcfr](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/jcfr/32/17825_2.png) [@jcfr](https://discourse.slicer.org/u/jcfr)\
**Post date:** [July 22, 2025, 7:46am UTC](https://discourse.slicer.org/t/is-there-an-issue-with-linux-builds-currently/43743/14 "2025-07-22T07:46:04Z")

</div>

Root cause has been identified and build environment will be updated later today.