如何在github操作中使用创建文件安装构建工具

Question

我需要为github动作安装Seihon（https://github.com/ldez/seihon）：

steps:
- uses: actions/checkout@v2
- name: Install
  run: curl -sfL https://raw.githubusercontent.com/ldez/seihon/master/godownloader.sh | bash -s -- -b $GOPATH/bin v0.5.1
- name: Build
  run: make publish-images

不幸的是，失败了：

install: cannot create regular file '/bin/seihon': Permission denied
Error: Process completed with exit code 1.

我需要在github上做什么来安装构建工具？