diff --git a/.github/workflows/build_base.yml b/.github/workflows/build_base.yml
index cc7e13f..fd2e3a1 100644
--- a/.github/workflows/build_base.yml
+++ b/.github/workflows/build_base.yml
@@ -57,7 +57,7 @@ jobs:
         run: echo "CUDA_VERSION=${{github.event.inputs.cuda_version || env.CUDA_VERSION_DEFAULT}}" >> $GITHUB_ENV
       - name: set short CUDA version
         id: cuda_short
-        run: echo "CUDA_VERSION_SHORT=${{github.event.inputs.cuda_version || env.CUDA_VERSION_DEFAULT}%.*}" >> $GITHUB_ENV
+        run: echo "CUDA_VERSION_SHORT=${{github.event.inputs.cuda_version%.* || env.CUDA_VERSION_DEFAULT%.*}}" >> $GITHUB_ENV
       - 
         name: set CUDNN version
         id: cudnn