Error building Zeit project with two Go functions

now-configless-ianfoo-1zvz3xpyb.log

TaskID 0999ab9e-b992-43a1-9690-fcda177f0243
TaskID 0999ab9e-b992-43a1-9690-fcda177f0243
yarn info @now/build-utils@latest...
yarn info @now/go...
yarn add @now/[email protected]...
yarn add v1.16.0
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 1 new dependency.
info Direct dependencies
└─ @now/[email protected]
info All dependencies
└─ @now/[email protected]
Done in 0.48s.
yarn add @now/[email protected]...
yarn add v1.16.0
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 1 new dependency.
info Direct dependencies
└─ @now/[email protected]
info All dependencies
└─ @now/[email protected]
Done in 0.70s.
yarn run now-postinstall...
yarn run v1.16.0
$ node dist/install/index.js
Downloading Go ...
Done in 8.16s.
yarn info @now/build-utils@latest...
yarn info @now/go...
running builder.exports.build...
Downloading user files...
Parsing AST for "api/date.go"
Downloading Go ...
running builder.exports.build...
Downloading user files...
Parsing AST for "api/now.go"
go: cannot find GOROOT directory: /usr/local/go
Failed to parse AST for "api/now.go"
{ Error: Command failed: go build -ldflags -s -w -o /tmp/e61dac4b09bfcf84/.build-utils/.builder/node_modules/@now/go/dist/analyze /tmp/e61dac4b09bfcf84/.build-utils/.builder/node_modules/@now/go/dist/analyze.go
    at makeError (/tmp/e61dac4b09bfcf84/.build-utils/.builder/node_modules/@now/go/dist/index.js:39080:9)
    at Promise.all.then.arr (/tmp/e61dac4b09bfcf84/.build-utils/.builder/node_modules/@now/go/dist/index.js:39184:16)
    at <anonymous>
    at process._tickDomainCallback (internal/process/next_tick.js:228:7)
  code: 2,
  stdout: null,
  stderr: null,
  failed: true,
  signal: null,
  cmd: 'go build -ldflags -s -w -o /tmp/e61dac4b09bfcf84/.build-utils/.builder/node_modules/@now/go/dist/analyze /tmp/e61dac4b09bfcf84/.build-utils/.builder/node_modules/@now/go/dist/analyze.go',
  timedOut: false,
  killed: false }
done
go: finding github.com/zeit/now-builders/utils latest
go: finding github.com/zeit/now-builders latest
go: downloading github.com/zeit/now-builders v0.0.0-20190808002248-0f655daa3097
go: extracting github.com/zeit/now-builders v0.0.0-20190808002248-0f655daa3097
go: finding github.com/aws/aws-lambda-go/events latest
go: finding github.com/aws/aws-lambda-go/lambda latest
go: finding github.com/aws/aws-lambda-go v1.12.1
go: downloading github.com/aws/aws-lambda-go v1.12.1
go: extracting github.com/aws/aws-lambda-go v1.12.1
go: finding github.com/stretchr/testify v1.3.0
go: finding github.com/urfave/cli v1.21.0
go: finding github.com/davecgh/go-spew v1.1.0
go: finding github.com/pmezard/go-difflib v1.0.0
go: finding github.com/stretchr/objx v0.1.0
go: finding github.com/BurntSushi/toml v0.3.1
go: finding gopkg.in/yaml.v2 v2.2.2
go: finding gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405
go: downloading github.com/stretchr/testify v1.3.0
go: extracting github.com/stretchr/testify v1.3.0
go: downloading github.com/davecgh/go-spew v1.1.0
go: downloading github.com/pmezard/go-difflib v1.0.0
go: extracting github.com/pmezard/go-difflib v1.0.0
go: extracting github.com/davecgh/go-spew v1.1.0
Running `go build`...
done