diff --git a/dev.py b/dev.py
index 49f2983..5ae3341 100644
--- a/dev.py
+++ b/dev.py
@@ -1,9 +1,21 @@
+import shutil
 import sys
+import subprocess
 from pathlib import Path
 
 sys.argv.append('--dev')
 
+import flandre
 from flandre.launcher import launch_from_file
 
-if __name__ == '__main__':
+
+def main():
+    if (pyuic6 := shutil.which('pyuic6')) is None:
+        print('pyuic6 is not installed')
+        return
+    subprocess.run([pyuic6, '-o', flandre.PYQT / 'Main.py', flandre.PYQT / 'Main.ui'])
     launch_from_file(Path(__file__).parent / 'dev.toml')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/flandre/__init__.py b/flandre/__init__.py
index e6f7b26..f067a55 100644
--- a/flandre/__init__.py
+++ b/flandre/__init__.py
@@ -2,4 +2,5 @@ from pathlib import Path
 
 MODULE_FOLDER = Path(__file__).parent
 ASSETS = MODULE_FOLDER / 'assets'
+PYQT = MODULE_FOLDER / 'pyqt'
 DEV_PROJECT_FOLDER = MODULE_FOLDER.parent
\ No newline at end of file
diff --git a/flandre/pyqt/Main.py b/flandre/pyqt/Main.py
index 1f51cd6..3f16d43 100644
--- a/flandre/pyqt/Main.py
+++ b/flandre/pyqt/Main.py
@@ -1,4 +1,4 @@
-# Form implementation generated from reading ui file 'Main.ui'
+# Form implementation generated from reading ui file '/home/lambda/source/scarlet/flandre/flandre/pyqt/Main.ui'
 #
 # Created by: PyQt6 UI code generator 6.8.0
 #
@@ -431,7 +431,7 @@ class Ui_MainWindow(object):
         self.label_2.setAlignment(QtCore.Qt.AlignmentFlag.AlignCenter)
         self.label_2.setObjectName("label_2")
         self.gridLayout_5.addWidget(self.label_2, 0, 0, 1, 3)
-        self.s_t_end = QtWidgets.QSlider(parent=self.centralwidget)
+        self.s_t_end = QJumpSlider(parent=self.centralwidget)
         self.s_t_end.setMinimum(1)
         self.s_t_end.setMaximum(1500)
         self.s_t_end.setOrientation(QtCore.Qt.Orientation.Horizontal)
diff --git a/flandre/pyqt/Main.ui b/flandre/pyqt/Main.ui
index 008712f..9d2e601 100644
--- a/flandre/pyqt/Main.ui
+++ b/flandre/pyqt/Main.ui
@@ -806,7 +806,7 @@ border-radius: 7px;
        </widget>
       </item>
       <item row="4" column="1">
-       <widget class="QSlider" name="s_t_end">
+       <widget class="QJumpSlider" name="s_t_end">
         <property name="minimum">
          <number>1</number>
         </property>