Go - Cucumber - Error on godog run - failed to compile testmain package: exit status 2

I'm trying to include godog in a go project in order to test some APIs. This is the structure

• Project Folder
• ...
• ...
• src
  • cmd
    • features
      • ready.feature
    • main.go
    • main_test.go

The webserver starts in the main() function contained in a file named main.go under the cmd folder. So I have added under the cmd folder a new features folder with a ready.feature file:

Feature: get ready
  In order to know if microservice is ready
  As an API user
  I need to be able to check the ready

  Scenario: should get ready
    When I send "GET" request to "/ready"
    Then the response code should be 200
    And the response should match json:
      """
      {
        service is ready
      }
      """

Now, after the execution of this command:

godog run ready.feature

I get :

func iSendRequestTo(arg1, arg2 string) error {
        return godog.ErrPending
}

func theResponseCodeShouldBe(arg1 int) error {
        return godog.ErrPending
}

func theResponseShouldMatchJson(arg1 *godog.DocString) error {
        return godog.ErrPending
}

func InitializeScenario(ctx *godog.ScenarioContext) {
        ctx.Step(`^I send "([^"]*)" request to "([^"]*)"$`, iSendRequestTo)
        ctx.Step(`^the response code should be (\d+)$`, theResponseCodeShouldBe)
        ctx.Step(`^the response should match json:$`, theResponseShouldMatchJson)
}

So I've created the main_test.go file under the cmd folder with the content suggested by godog and tried to run godog (in order to run the test) with the command "godog run" but I get every time (and yes, I've reworked the main_test.go file) this error:

failed to compile testmain package: exit status 2 - output: /tmp/go-build2631598204/b001/_testmain.go:5:8: could not import project/src/cmd (open : no such file or directory)

Could you help me, please ?