The layout of the Fuchsia checkout is not compatible out-of-the-box with standard Go tooling like
go test and
gopls (the Go language server).
To set up your workspace for compatibility with Go tooling, run
fx setup-go. This will create all of the symlinks and other files necessary for Go tooling and to work and be compatible with IDEs.
Note that this is only necessary if you care about IDE features and/or running
go commands directly. If you're happy without IDE features and with using
fx build, and
fx test to work with Go, feel free to skip this setup.