diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7279c05e..efc90141 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ defaults:
 
 jobs:
   CI:
-    if: "!contains(github.event.head_commit.message, '[skip ci]') && matrix.version == '1' || (matrix.version != '1' && matrix.os == 'ubuntu-latest')"
+    if: "!contains(github.event.head_commit.message, '[skip ci]') && (${{matrix.version}} == '1' || (${{matrix.version}} != '1' && ${{matrix.os}} == 'ubuntu-latest'))"
     env:
       GKS_ENCODING: "utf8"
       GKSwstype: "100"