build failed under FreeBSD

[iron-udjin]

Describe the bug:

$ go install github.com/anmitsu/goful@latest

go: downloading github.com/anmitsu/goful v0.2.1
go: downloading github.com/mattn/go-runewidth v0.0.13
go: downloading github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510
go: downloading github.com/gdamore/tcell/v2 v2.4.0
go: downloading github.com/rivo/uniseg v0.2.0
go: downloading github.com/lucasb-eyer/go-colorful v1.2.0
go: downloading github.com/gdamore/encoding v1.0.0
go: downloading golang.org/x/text v0.3.7
go: downloading golang.org/x/sys v0.0.0-20211124211545-fe61309f8881
go: downloading golang.org/x/term v0.0.0-20210927222741-03fcf44c2211
# github.com/anmitsu/goful/info
../../go/pkg/mod/github.com/anmitsu/[email protected]/info/info_unix.go:23:10: invalid operation: statfs.Bavail * uint64(statfs.Bsize) (mismatched types int64 and uint64)

To Reproduce:

Steps to reproduce the behavior:

Stack trace:

Desktop (please complete the following information):

• OS: FreeBSD 13-STABLE
• Terminal: Foot Terminal

Additional context: