After bisecting `nixpkgs-master` I realized that the usage of
`-trimpath`[0] by default for Go modules[1] is responsible for breaking UI
delivery of `gotify-server`[2].
This behavior can only be turned off by setting `allowGoReference` to
`true`.
We may want to find a better long-term fix, but given that this only
affects a leaf-package and actually fixes the problem, this is good
enough for now.
Fixes#105472
[0] https://golang.org/doc/go1.13#go-command
[1] 4e9f7bbf8573d07f7b0c87d97c026cd4aad5a758
[2] https://hydra.nixos.org/build/131660876
c55af95e8f