diff --git a/.github/actions/build/action.yml b/.github/actions/build/action.yml
index 6331c521..fc3bc20c 100644
--- a/.github/actions/build/action.yml
+++ b/.github/actions/build/action.yml
@@ -55,6 +55,7 @@ runs:
         cp build/canary.icns build/icon.icns
 
     - name: Build
+      shell: bash
       run: |
         if [ -z "$CSC_LINK" ] ; then unset CSC_LINK ; fi
         if [ -z "$CSC_KEY_PASSWORD" ] ; then unset CSC_KEY_PASSWORD ; fi