ticker.Reset undefined

I git clone grafana and get some error.

when I run command make run

Version: 7.5.0-pre, Linux Version: 7.5.0, Package Iteration: 1612687889pre
go build -ldflags -w -X main.version=7.5.0-pre -X main.commit=16f5d60d17 -X main.buildstamp=1611607177 -X main.buildBranch=master -o ./bin/grafana-server ./pkg/cmd/grafana-server
# github.com/grafana/grafana/pkg/util/retryer
pkg/util/retryer/retryer.go:33:10: ticker.Reset undefined (type *time.Ticker has no field or method Reset)
pkg/util/retryer/retryer.go:37:10: ticker.Reset undefined (type *time.Ticker has no field or method Reset)
note: module requires Go 1.15
exit status 2
exit status 1
[Bra] 02-07 16:51:30 [ WARN] Fail to execute command: go [run build.go -dev build-server] - exit status 1

macOS bigsur 11.1
go version go1.14.2 darwin/amd64

how can i run grafana from source

Upgrade go to lastet version is work for me.
it’s error for goversion.