diff --git a/.github/workflows/go.build.yaml b/.github/workflows/go.build.yaml
index ce553d5..32a3247 100644
--- a/.github/workflows/go.build.yaml
+++ b/.github/workflows/go.build.yaml
@@ -103,7 +103,7 @@ jobs:
         run: cp .github/workflows/localbeach.rb.tpl homebrew/Formula/localbeach.rb
 
       - name: Set RELEASE_VERSION env
-        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*v/}" >> $GITHUB_ENV
+        run: echo "RELEASE_VERSION=${GITHUB_REF#refs/*/v}" >> $GITHUB_ENV
 
       # see: https://github.com/bluwy/substitute-string-action
       - name: Substitute Homebrew variables