diff --git a/.clang-format-ignore b/.clang-format-ignore
index 47d699abf..b672d67d7 100644
--- a/.clang-format-ignore
+++ b/.clang-format-ignore
@@ -11,3 +11,4 @@ kitty/color-names.h
 kitty/parse-graphics-command.h
 kitty/parse-multicell-command.h
 kittens/unicode_input/names.h
+3rdparty/**
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 72df57e17..849d6a173 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -68,7 +68,7 @@ jobs:
 
     linux-package:
         name: Linux package
-        runs-on: ubuntu-26.04
+        runs-on: ubuntu-latest
         env:
             CFLAGS: -funsigned-char
         steps:
@@ -106,14 +106,11 @@ jobs:
                 ${{ runner.os }}-golang-static-
 
           - name: Install build-only deps
-            run: python -m pip install -r docs/requirements.txt ruff ty types-requests types-docutils types-Pygments
+            run: python -m pip install -r docs/requirements.txt ruff ty types-requests types-docutils types-Pygments clang-format
 
           - name: Run ruff
             run: ruff check .
 
-          - name: Install clang-format
-            run: sudo apt-get install -y clang-format
-
           - name: Check code formatting
             run: go version && python .github/workflows/ci.py check_code_formatting