From 53d6f0d4923d8bd1f01cc72009513f14244f5eb1 Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <git@benoitblanchon.fr>
Date: Fri, 19 Mar 2021 11:50:29 +0100
Subject: [PATCH] CI: Fixed build on Arduino 1.6.7

---
 .github/workflows/ci.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a917de7a..d8d2093f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -157,15 +157,16 @@ jobs:
   arduino:
     name: Arduino
     needs: gcc
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
         include:
           - arduino: '1.6.7'
+            os: ubuntu-18.04  # java.lang.Error: Cannot load com.sun.java.swing.plaf.gtk.GTKLookAndFeel
             board: arduino:avr:uno
           - arduino: '1.8.2'
             board: arduino:samd:mkr1000
+    runs-on: ${{ matrix.os || 'ubuntu-latest' }}
     steps:
       - name: Checkout
         uses: actions/checkout@v2