diff --git a/.github/workflows/diffcalc.yml b/.github/workflows/diffcalc.yml
index e7c628e365..d4150208d3 100644
--- a/.github/workflows/diffcalc.yml
+++ b/.github/workflows/diffcalc.yml
@@ -185,9 +185,11 @@ jobs:
 
       - name: Add comment environment
         if: ${{ github.event_name == 'issue_comment' }}
+        env:
+          COMMENT_BODY: ${{ github.event.comment.body }}
         run: |
           # Add comment environment
-          echo '${{ github.event.comment.body }}' | sed -r 's/\r$//' | grep -E '^\w+=' | while read -r line; do
+          echo $COMMENT_BODY | sed -r 's/\r$//' | grep -E '^\w+=' | while read -r line; do
               opt=$(echo ${line} | cut -d '=' -f1)
               sed -i "s;^${opt}=.*$;${line};" "${{ needs.directory.outputs.GENERATOR_ENV }}"
           done