* mark as broken on darwin
```
these derivations will be built:
/nix/store/f29hm2393h56xh4slil62zlb72j5k0nq-wtf-0.32.0.drv
building '/nix/store/f29hm2393h56xh4slil62zlb72j5k0nq-wtf-0.32.0.drv'...
unpacking sources
unpacking source archive /nix/store/7xd1c92n7i0pcpxb71qgfz7d0hasbcrf-source
source root is source
patching sources
configuring
building
Building subPackage ./.
modules/azuredevops/widget.go:7:2: cannot find package "." in:
/private/var/folders/hk/77b9kbln51v8hgc1c6j767k00000gn/T/nix-build-wtf-0.32.0.drv-0/source/vendor/github.com/microsoft/azure-devops-go-api/azuredevops
modules/azuredevops/client.go:7:2: cannot find package "." in:
/private/var/folders/hk/77b9kbln51v8hgc1c6j767k00000gn/T/nix-build-wtf-0.32.0.drv-0/source/vendor/github.com/microsoft/azure-devops-go-api/azuredevops/build
builder for '/nix/store/f29hm2393h56xh4slil62zlb72j5k0nq-wtf-0.32.0.drv' failed with exit code 1
error: build of '/nix/store/f29hm2393h56xh4slil62zlb72j5k0nq-wtf-0.32.0.drv' failed
```
The go modules utilized by the project and the vendored dependencies already
diverged, so the nix build of `wtf` was slightly out-of-date regarding the
official binary.
The gocenter proxy provides "immutable re-usable Go modules" which should avoid
the problem of any dependency suddenly vanishing.
