diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0db4c4c0..c83b3b0f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -208,7 +208,7 @@ jobs:
           python-version: ${{ env.python-version }}
       - name: Install Python dependencies
         run: |
-          pip install .
+          pip install -e .
       - name: Run pre-commit test
         uses: pre-commit/action@v3.0.1
   packaging-test:
@@ -240,7 +240,7 @@ jobs:
           python-version: ${{ env.python-version }}
       - name: Install Python dependencies
         run: |
-          pip install .[packaging]
+          pip install -e .[packaging]
       - name: Run packaging test
         run: |
           check-manifest
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c296354e..b50ce2a1 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -9,4 +9,6 @@ repos:
     rev: v1.18.2
     hooks:
       - id: mypy
+        args: []
         files: "^(wlroots|tiny)\/.*"
+        additional_dependencies: [pywayland]