I am learning from a book the book says to add a couple lines of code, but it throws an error

package main

import (
   "./lissajous"
   "log"
   "net/http" 
)

func main() {

   handler := func(w http.ResponseWriter, r *http.Request) {
        lissajous(w)
   }
   http.HandleFunc("/", handler) // each request calls handler
   log.Fatal(http.ListenAndServe("localhost:8000", nil))
}

it throws this error

./server.go:6: imported and not used:
"_/home/zach/Dropbox/Personal/Go_Programming
         /The_Go_Programming_Language/ch01/web/lissajous"
./server.go:14: use of package lissajous without selector

the package directory I think is correct, but can't seem to call functions, the set up for the handler is just like that in the book am I missing something?

any help appreciated?