Unable to build project: no matching versions for query "upgrade"

[medined]

Any help would be appreciated. I don't know Go but am interested in using the project.

I am running on Ubuntu. Here are the steps that I followed:

$ git clone https://github.com/nicewook/gopt.git

$ sudo apt  install golang-go

$ go build
go: downloading github.com/spf13/cobra v1.7.0
go: downloading github.com/briandowns/spinner v1.23.0
go: downloading github.com/fatih/color v1.15.0
go: downloading github.com/chzyer/readline v1.5.1
go: downloading github.com/pkoukk/tiktoken-go v0.1.3
go: downloading github.com/sashabaranov/go-openai v1.14.0
go: downloading github.com/spf13/viper v1.16.0
go: downloading github.com/mattn/go-isatty v0.0.19
go: downloading github.com/mattn/go-colorable v0.1.13
go: downloading github.com/google/uuid v1.3.0
go: downloading github.com/dlclark/regexp2 v1.8.1
go: downloading github.com/spf13/pflag v1.0.5
go: downloading golang.org/x/sys v0.10.0
go: downloading github.com/spf13/afero v1.9.5
go: downloading github.com/spf13/cast v1.5.1
go: downloading github.com/pelletier/go-toml/v2 v2.0.8
go: downloading github.com/spf13/jwalterweatherman v1.1.0
go: downloading github.com/magiconair/properties v1.8.7
go: downloading gopkg.in/yaml.v3 v3.0.1
go: downloading github.com/fsnotify/fsnotify v1.6.0
go: downloading gopkg.in/ini.v1 v1.67.0
go: downloading github.com/hashicorp/hcl v1.0.0
go: downloading github.com/mitchellh/mapstructure v1.5.0
go: downloading github.com/subosito/gotenv v1.4.2
go: downloading golang.org/x/term v0.1.0
go: downloading golang.org/x/text v0.9.0
cmd/config.go:11:2: no required module provides package github.com/nicewook/gopt/internal/gopt; to add it:
	go get github.com/nicewook/gopt/internal/gopt
	
$ go get github.com/nicewook/gopt/internal/gopt
go: github.com/nicewook/gopt/internal/gopt: no matching versions for query "upgrade"