can't compile to wasm

I'm trying to use this package in a wasm environment but it fails miserably 

```
     imports github.com/VictoriaMetrics/fastcache
        imports golang.org/x/sys/unix: build constraints exclude all Go files in /Users/x/go/pkg/mod/golang.org/x/sys@v0.0.0-20210910150752-751e447fb3d0/unix

```