"package XXX is not in GOROOT" when building a Go project

Question

I have a weird issue that arose when I took a break from this project. Upon starting up Goland, I'm riddled with errors when trying to run my project.

The specific error, when building one of my packages, is: start.go: package project/game is not in GOROOT (C:\Go\src\project\game)

I have a folder structure as such under C:\Users\username

go |-src    |-project         |-game             |-entity                  |-whatever.go             |-game_stuff.go         |-server 

and my env vars are as such:

GOROOT=C:\Go  GOPATH=C:\Users\ketchup\go  

for each of the modules (project/game/entity, project/game, project/server), I did a git mod init.

When building, Goland will try to run this:

C:\Go\bin\go.exe build -o C:\Users\ketchup\AppData\Local\Temp\___go_build_project_server.exe project/server 

and return the error.

Can anyone help me with this issue? Kind of lost since Goland was working fine the last time I opened it. Also not even sure what direction to look at - I'm pretty new to Go and I'm not really sure what documentation to look at :\ Thank you everyone!

Answer 1

You may have GO111MODULE set "on", which will be on the go mod. Turning off the GO111MODULE may resolve this problem.

go env -w GO111MODULE=off