diff --git a/action.yaml b/action.yaml
index 9dc5eca..d8373ef 100644
--- a/action.yaml
+++ b/action.yaml
@@ -348,7 +348,7 @@ runs:
 
   - name: Set repositories
     run: |
-      OS_CODENAME=$(lsb_release --codename --short | tail)
+      OS_CODENAME=$(lsb_release --codename --short | tail -1)
       cat > ${HOME}/.Rprofile <<EOF
       options(
         repos = c(