Missing go.mod, fails on build

[dracorp]

Hi
There is missing go.mod. My steps to build:

go mod init github.com/kofemann/nfstop
...
go get -u github.com/gizak/termui/v3

git diff
diff --git a/main.go b/main.go
index 5423384..2b1d621 100644
--- a/main.go
+++ b/main.go
@@ -9,7 +9,7 @@ import (
        "strconv"
        "time"

-       ui "github.com/gizak/termui"
+       ui "github.com/gizak/termui/v3"
        "github.com/kofemann/nfstop/nfs"
        "github.com/kofemann/nfstop/sniffer"
        "github.com/kofemann/nfstop/utils"

go build
# github.com/kofemann/nfstop
./main.go:115:14: undefined: ui.NewPar
./main.go:116:22: undefined: ui.ColorDefault
./main.go:117:25: undefined: ui.ColorDefault
./main.go:120:15: undefined: ui.NewPar
./main.go:121:23: undefined: ui.ColorDefault
./main.go:122:26: undefined: ui.ColorDefault
./main.go:125:14: undefined: ui.TermHeight
./main.go:127:18: undefined: ui.NewList
./main.go:130:29: undefined: ui.ColorDefault
./main.go:132:22: undefined: ui.NewList
./main.go:132:22: too many errors

Generated go.mod:

cat go.mod
module github.com/kofemann/nfstop

go 1.21.11

require (
	github.com/gizak/termui v3.1.0+incompatible // indirect
	github.com/gizak/termui/v3 v3.1.0 // indirect
	github.com/kofemann/linux_ftrace v0.0.0-20170424113734-fef409661a6a // indirect
	github.com/mattn/go-runewidth v0.0.16 // indirect
	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
	github.com/nsf/termbox-go v1.1.1 // indirect
	github.com/patrickmn/go-cache v2.1.0+incompatible // indirect
	github.com/rivo/uniseg v0.4.7 // indirect
	github.com/tsg/gopacket v0.0.0-20200626092518-2ab8e397a786 // indirect
)

The packages also requires pcap.h header file.