diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6a93be1..7b75a96 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -31,7 +31,7 @@ jobs:
 
       - name: Extract version for tags
         run: |
-          echo "FULL_VERSION=$(grep -oP '(?<=SYNAPSE_VERSION=).*' Dockerfile" >> $GITHUB_ENV
+          echo "FULL_VERSION=$(grep -oP '(?<=SYNAPSE_VERSION=).*' Dockerfile") >> $GITHUB_ENV
           echo "MAJOR_VERSION=$(grep -oP '(?<=SYNAPSE_VERSION=).*' Dockerfile | head -c5)" >> $GITHUB_ENV
 
       - name: Install cosign