Vet command & module file with replace directive ==> Error: cannot find module providing package...

When running the Vet command I get the following error:

cannot find module providing package github.com/davecgh/go-spew/spew: working directory is not part of a module

Since I had to fix the package, I have a local version installed, which I use via the replace feature in the .mod file:

module x

go 1.15

require (
   github.com/davecgh/go-spew v1.1.1
)

replace (
   github.com/davecgh/go-spew => ../go-spew
)

So, what do I need to fix? Building the package works.