Cannot find package "." in

[JonathanLorimer]

Describe the bug
gomod2nix seems to struggle with go dependencies that are part of the repo and referenced by relative paths. When I try and package regen-network I am getting this error:

app/app.go:10:2: cannot find package "." in:
        /build/source/vendor/github.com/regen-network/regen-ledger/types/module
app/app.go:95:2: cannot find package "." in:
        /build/source/vendor/github.com/regen-network/regen-ledger/types/module/server
app/app.go:96:2: cannot find package "." in:
        /build/source/vendor/github.com/regen-network/regen-ledger/x/ecocredit
app/app.go:11:2: cannot find package "." in:
        /build/source/vendor/github.com/regen-network/regen-ledger/x/ecocredit/module

The issue seems to be with these dependencies. The relevant error sites are listed below:

• https://github.com/regen-network/regen-ledger/blob/master/app/app.go#L10-L11
• https://github.com/regen-network/regen-ledger/blob/master/app/app.go#L95-L96

I also think that this has something to do with the local replace directives here
To Reproduce
I created a repro repo here. You should just have to run nix build to get the error. Since the repo is a flake you can just run nix build github:JonathanLorimer/gomod-repro-1 without even cloning the repo.

Expected behavior
I expected this module to build without errors

Environment

• OS name + version: NixOS 21.11 (Porcupine) x86_64
• Version of the code: 67f22dd738d092c6ba88e420350ada0ed4992ae8

Additional context
I have very limited golang knowledge so there might be something completely wrong with the go side of things and I am just missing it. Thank you for your help in advance!

[JonathanLorimer]

Getting this issue resolved will help me close informalsystems/cosmos.nix#19

[JonathanLorimer]

Okay, I think I have identified what the issue is! These local, relative path, directives don't end up in the go.sum. This means that gomod2nix doesn't end up picking them up and they are missing from the vendor-env! I am not sure what the best solution to this is, right now I am trying to figure out a hacky work around to just splice in the dependency I need.

[573]

Have similar issue with packaging dasel.

[573]

Similar issue (Cannot find package "." in) when packaging https://github.com/mickael-menu/zk.
The customVendorSrc (#22) there would be https://github.com/aymerick/raymond/.

[573]

Adding nix-casync to the affected go software.

[adisbladis]

This issue is not fully resolved but was auto-closed by Github when #41 was merged.

@JonathanLorimer Have you solved this issue for yourself? I got this too with Zitadel.
Trying to use your PR as a flake input resulted in some errors.

This might be a different issue though? (There are not really local packages...)

../protoc-base/templates.go:9:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/github.com/Masterminds/sprig
../protoc-base/protoc_helper.go:12:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/github.com/golang/glog
../protoc-base/protoc_helper.go:13:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/github.com/golang/protobuf/proto
../protoc-base/protoc_helper.go:14:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/github.com/golang/protobuf/protoc-gen-go/plugin
../protoc-base/protoc_helper.go:15:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway/descriptor
../protoc-base/templates.go:12:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/golang.org/x/tools/imports
authoption/options.pb.go:10:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/google.golang.org/protobuf/reflect/protoreflect
authoption/options.pb.go:11:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/google.golang.org/protobuf/runtime/protoimpl
authoption/options.pb.go:12:2: cannot find package "." in:
        /build/source/gopath/src/github.com/zitadel/zitadel/vendor/google.golang.org/protobuf/types/descriptorpb

I do override buildPhase, could that be the problem?

Actually, this is still in the configurePhase, as I need to generate some go files there. Irrelevant to this issue then.

[0xbala-k]

Any fixes or workarounds for this?