examples/process_monitor$ GOOS=darwin GOARCH=arm64 go build

    # go.hasen.dev/shirei/cocoabackend
    ../../../gopath/pkg/mod/go.hasen.dev/shirei@v0.5.0/cocoabackend/
    perf_darwin.go:198:11: undefined: softRenderer
    ../../../gopath/pkg/mod/go.hasen.dev/shirei@v0.5.0/cocoabackend/
    perf_darwin.go:208:22: undefined: softRenderer