diff --git a/.github/workflows/documentation-build.yml b/.github/workflows/documentation-build.yml
index a2e57202..a39f8c6d 100644
--- a/.github/workflows/documentation-build.yml
+++ b/.github/workflows/documentation-build.yml
@@ -41,12 +41,9 @@ jobs:
 
     - name: Install dependencies
       run: |
-        pixi install -e docs
-        pixi run -e docs install-dev
-
-    - name: Build documentation
-      run: pixi run -e docs docs-build
-
+        sudo apt install pandoc
+        python -m pip install sphinx==8.1.3
+        python -m pip install . '.[dev,docs]'
     - name: Build and Commit
       uses: sphinx-notes/pages@master
       with:
diff --git a/.github/workflows/python-ci.yml b/.github/workflows/python-ci.yml
index e1a0adc2..e84525d0 100644
--- a/.github/workflows/python-ci.yml
+++ b/.github/workflows/python-ci.yml
@@ -55,13 +55,12 @@ jobs:
         post-cleanup: false
 
     - name: Install dependencies
-      run: pixi install
-
-    - name: Install package in development mode
-      run: pixi run install-dev
+      run: python -m pip install -e '.[dev]'
 
     - name: Test with pytest and coverage
-      run: pixi run test-cov
+      run: |
+        python -m pip install tox tox-gh-actions coverage
+        python -m tox
 
     - name: Upload coverage reports to Codecov
       # only on ubuntu to avoid multiple uploads
@@ -94,11 +93,10 @@ jobs:
 
     - name: Install dependencies and build
       run: |
-        pixi install
-        pixi run install-dev
-        pixi run build
+        python -m pip install -e '.[dev]'
+        python -m build
 
     - name: Check Build
       run: |
         cd ./dist
-        pixi run test
\ No newline at end of file
+        python -m pytest ../
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 556d1316..b27950e3 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -29,12 +29,12 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies and build
       run: |
-        pip install -e '.[dev]'
+        python -m pip install -e '.[dev]'
         python -m build
     - name: Test with pytest
       run: |
         cd ./dist
-        pytest ../
+        python -m pytest ../
     - uses: actions/upload-artifact@v4
       with:
         name: EasyReflectometrys - Python ${{ matrix.python-version }}
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index 79007b8e..f6beb417 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -36,9 +36,8 @@ jobs:
 
     - name: Install dependencies and build
       run: |
-        pixi install
-        pixi run install-dev
-        pixi run build
+        python -m pip install -e '.[dev]'
+        python -m build
 
     - name: Publish distribution 📦 to PyPI
       uses: pypa/gh-action-pypi-publish@release/v1