This happens on linux too. every time I set GO111MODULE=off before running go get -v github.com/therecipe/qt/cmd/... && for /f %v in ('go env GOPATH') do %v\bin\qtsetup test && %v\bin\qtsetup -test=false, I always get something like this:
go: modules disabled by GO111MODULE=off; see go help modules
am I missing something?