diff --git a/src/cpl_cli/command/install_service.py b/src/cpl_cli/command/install_service.py
index 413ae535..46cc3ba7 100644
--- a/src/cpl_cli/command/install_service.py
+++ b/src/cpl_cli/command/install_service.py
@@ -36,16 +36,20 @@ class InstallService(CommandABC):
             Error.error('Found invalid dependencies in cpl.json.')
             return
 
+        Pip.set_executable(project.python_path)
         for dependency in project.dependencies:
             Console.spinner(
                 f'Installing: {dependency}',
                 Pip.install, dependency,
+                source='https://pip.sh-edraft.de' if 'sh_cpl' in dependency else None,
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 text_foreground_color=ForegroundColorEnum.green,
                 spinner_foreground_color=ForegroundColorEnum.cyan
             )
 
+        Pip.reset_executable()
+
     @staticmethod
     def _get_project_settings_dict(project: ProjectSettings) -> dict:
         return {
diff --git a/src/cpl_cli/command/update_service.py b/src/cpl_cli/command/update_service.py
index b9f76f4d..b92e5965 100644
--- a/src/cpl_cli/command/update_service.py
+++ b/src/cpl_cli/command/update_service.py
@@ -21,25 +21,15 @@ class UpdateService(CommandABC):
 
     @staticmethod
     def _install_package(name: str):
-        if 'sh_cpl' in name:
-            Pip.install(
-                name,
-                '--upgrade',
-                '--upgrade-strategy',
-                'eager',
-                source='https://pip.sh-edraft.de',
-                stdout=subprocess.DEVNULL,
-                stderr=subprocess.DEVNULL
-            )
-        else:
-            Pip.install(
-                name,
-                '--upgrade',
-                '--upgrade-strategy',
-                'eager',
-                stdout=subprocess.DEVNULL,
-                stderr=subprocess.DEVNULL
-            )
+        Pip.install(
+            name,
+            '--upgrade',
+            '--upgrade-strategy',
+            'eager',
+            source='https://pip.sh-edraft.de' if 'sh_cpl' in name else None,
+            stdout=subprocess.DEVNULL,
+            stderr=subprocess.DEVNULL
+        )
 
     def _update_project_dependencies(self):
         for package in self._project_settings.dependencies:
diff --git a/src/cpl_cli/configuration/project_settings.py b/src/cpl_cli/configuration/project_settings.py
index 1cd0d4f9..27a94ddf 100644
--- a/src/cpl_cli/configuration/project_settings.py
+++ b/src/cpl_cli/configuration/project_settings.py
@@ -109,10 +109,8 @@ class ProjectSettings(ConfigurationModelABC):
             self._python_version = settings[ProjectSettingsNameEnum.python_version.value]
 
             if ProjectSettingsNameEnum.python_path.value in settings:
-                path = os.path.abspath(settings[ProjectSettingsNameEnum.python_path.value])
-                if os.path.isfile(path) or os.path.islink(path):
-                    path = os.path.abspath(path)
-                else:
+                path = settings[ProjectSettingsNameEnum.python_path.value]
+                if not os.path.isfile(path) or not os.path.islink(path):
                     path = sys.executable
                     Error.warn(f'{ProjectSettingsNameEnum.python_path.value} not found')
             else:
diff --git a/src/tests/custom/general/cpl.json b/src/tests/custom/general/cpl.json
index 21cd45ee..6fbbf7d3 100644
--- a/src/tests/custom/general/cpl.json
+++ b/src/tests/custom/general/cpl.json
@@ -19,7 +19,7 @@
       "sh_cpl==2021.4.1"
     ],
     "PythonVersion": ">=3.8",
-    "PythonPath": "/home/sven/Nextcloud_Sven/Schreibtisch/git_sh-edraft_de/sh_common_py_lib/cpl-env/bin/python3.9",
+    "PythonPath": "../../../../cpl-env/bin/python3.9",
     "Classifiers": []
   },
   "BuildSettings": {