diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index 8e2da6c..a37b946 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -42,7 +42,7 @@ jobs:
           BUILD_ARGS=""
           echo "${{ inputs.build-args }}" | while IFS= read -r line; do
             if [[ ! -z "$line" ]]; then
-              BUILD_ARGS+=" --build-arg $line"
+              BUILD_ARGS="$BUILD_ARGS --build-arg $line"
             fi
           done
           echo "$BUILD_ARGS"