ultimate go module major version test case

deps.nix

# file generated from go.mod using vgo2nix (https://github.com/adisbladis/vgo2nix)
[
  {
    goPackagePath = "github.com/cespare/xxhash/v2";
    fetch = {
      type = "git";
      url = "https://github.com/yihuang/test-golang-module-major-version";
      rev = "4a13e4bfd5a9";
      sha256 = "0i1bpw3v73jhwnpa8vv276qhy39fk6qhgyci0wng9mwr2pxfha5y";
	  moduleDir = "";
    };
  }
  {
    goPackagePath = "github.com/yihuang/test-golang-module-major-version";
    fetch = {
      type = "git";
      url = "https://github.com/yihuang/test-golang-module-major-version";
      rev = "v1.0.1";
      sha256 = "10gnzs3l8j6skyrfi2blvqx9b3l2bs2gdvrgjg7a9aiz6z7dkpvy";
	  moduleDir = "";
    };
  }
  {
    goPackagePath = "github.com/yihuang/test-golang-module-major-version/sub";
    fetch = {
      type = "git";
      url = "https://github.com/yihuang/test-golang-module-major-version";
      rev = "sub/v1.0.2";
      sha256 = "0g89fd75mhfyxgw2ip69idaf14586l9birq0kz59mdpak1ywr0k8";
	  moduleDir = "";
    };
  }
  {
    goPackagePath = "github.com/yihuang/test-golang-module-major-version/sub/v2";
    fetch = {
      type = "git";
      url = "https://github.com/yihuang/test-golang-module-major-version";
      rev = "sub/v2.0.1";
      sha256 = "026cfk2bpc7cyddabj8fcay3nysbj9zjam63jbq8psav4qwhwc2d";
	  moduleDir = "";
    };
  }
  {
    goPackagePath = "github.com/yihuang/test-golang-module-major-version/v2";
    fetch = {
      type = "git";
      url = "https://github.com/yihuang/test-golang-module-major-version";
      rev = "v2.0.1";
      sha256 = "026cfk2bpc7cyddabj8fcay3nysbj9zjam63jbq8psav4qwhwc2d";
	  moduleDir = "";
    };
  }
  {
    goPackagePath = "gopkg.in/check.v1";
    fetch = {
      type = "git";
      url = "https://gopkg.in/check.v1";
      rev = "20d25e280405";
      sha256 = "0k1m83ji9l1a7ng8a7v40psbymxasmssbrrhpdv2wl4rhs0nc3np";
	  moduleDir = "";
    };
  }
  {
    goPackagePath = "gopkg.in/yaml.v2";
    fetch = {
      type = "git";
      url = "https://gopkg.in/yaml.v2";
      rev = "v2.3.0";
      sha256 = "1md0hlyd9s6myv3663i9l59y74n4xjazifmmyxn43g86fgkc5lzj";
	  moduleDir = "";
    };
  }
]

go.mod

module testmod

go 1.15

require github.com/yihuang/test-golang-module-major-version v1.0.1

require github.com/yihuang/test-golang-module-major-version/v2 v2.0.1

require github.com/yihuang/test-golang-module-major-version/sub v1.0.2

require github.com/yihuang/test-golang-module-major-version/sub/v2 v2.0.1

require (
	github.com/cespare/xxhash/v2 v2.1.1
	gopkg.in/yaml.v2 v2.3.0
)

replace github.com/cespare/xxhash/v2 v2.1.1 => github.com/yihuang/test-golang-module-major-version/v2 v2.0.2-0.20200924181748-4a13e4bfd5a9

main.go

package main

import (
	"fmt"

	replaced "github.com/cespare/xxhash/v2"
	v1 "github.com/yihuang/test-golang-module-major-version"
	"gopkg.in/yaml.v2"

	v1_sub "github.com/yihuang/test-golang-module-major-version/sub"
	v2_sub "github.com/yihuang/test-golang-module-major-version/sub/v2"
	v2 "github.com/yihuang/test-golang-module-major-version/v2"
)

func main() {
	fmt.Println(v1.Test(), v2.Test(), v1_sub.Test(), v2_sub.Test(), replaced.Test())
	fmt.Println(yaml.Marshal(1))
}