diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index 0907e4358b..032c010b7d 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -36,29 +36,36 @@ jobs:
           VALIDATE_ALL_CODEBASE: false
           VALIDATE_GITHUB_ACTIONS: true
 
+      - uses: systemd/mkosi@dbb4020beee2cdf250f93a425794f1cf8b0fe693
+
       - name: Check that tabs are not used in Python code
         run: sh -c '! git grep -P "\\t" -- src/boot/generate-hwids-section.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py'
 
-      - name: Install ruff and mypy
+      - name: Build tools tree
         run: |
-          python3 -m pip install --break-system-packages --upgrade setuptools wheel pip
-          python3 -m pip install --break-system-packages mypy types-Pillow ruff
+          tee mkosi/mkosi.local.conf <<EOF
+          [Build]
+          ToolsTreeDistribution=fedora
+          ToolsTreeRelease=rawhide
+          EOF
+
+          mkosi -f sandbox -- true
 
       - name: Run mypy
         run: |
-          python3 -m mypy --version
-          python3 -m mypy src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
+          mkosi sandbox -- mypy --version
+          mkosi sandbox -- mypy src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
 
       - name: Run ruff check
         run: |
-          ruff --version
-          ruff check src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
+          mkosi sandbox -- ruff --version
+          mkosi sandbox -- ruff check src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
 
       - name: Run ruff format
         run: |
-          ruff --version
-          if ! ruff format --check src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
+          mkosi sandbox -- ruff --version
+          if ! mkosi sandbox -- ruff format --check src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
           then
               echo "Please run 'ruff format' on the above files or apply the diffs below manually"
-              ruff format --check --quiet --diff  src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
+              mkosi sandbox -- ruff format --check --quiet --diff src/boot/generate-hwids-section.py src/test/generate-sym-test.py src/ukify/ukify.py test/integration-tests/integration-test-wrapper.py
           fi
diff --git a/tools/fetch-mkosi.py b/tools/fetch-mkosi.py
index 90c318227f..175bb45990 100755
--- a/tools/fetch-mkosi.py
+++ b/tools/fetch-mkosi.py
@@ -15,7 +15,7 @@ from pathlib import Path
 URL = 'https://github.com/systemd/mkosi'
 BRANCH = 'main'  # We only want to ever use commits on upstream 'main' branch
 CONFIG = Path('mkosi/mkosi.conf')
-WORKFLOWS = [Path('.github/workflows/mkosi.yml'), Path('.github/workflows/coverage.yml')]
+WORKFLOWS = [Path('.github/workflows') / f for f in ['mkosi.yml', 'coverage.yml', 'linter.yml']]
 
 def parse_args():
     p = argparse.ArgumentParser(