diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f214c4c68c..bc28a9ecfc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        mach: [i3le, ti3le, i6le, ta6le] 
+        mach: ['i3le', 'ti3le', 'i6le', 'ta6le'] 
 
     env:
       TARGET_MACHINE: ${{ matrix.mach }}