The new version of mongo, 4.0.5, does not build properly using Homebrew on macOS. Version 4.0.4 included gotools which were built right before building and installing mongo itself. This homebrew formula no longer builds mongo properly. It appears that mongo-tools needs to be installed as a separate package that mongodb would then depend on, no? I have now edited the formula to remove the gotools section completely, but the build fails with this error:

```

ERROR: external binary not found: /private/tmp/mongodb-20190102-75152-1i2cqwm/mongodb-src-r4.0.5/src/mongo-tools/mongodump

```