brew install grafana/grafana fail (different error)

[mbbroberg]

I looked over the open tickets and see a beautiful new issue in this one 😄

brew reinstall grafana
==> Reinstalling grafana/grafana/grafana
==> Installing dependencies for grafana/grafana/grafana: go
==> Installing grafana/grafana/grafana dependency: go
==> Downloading https://homebrew.bintray.com/bottles/go-1.7.3.sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring go-1.7.3.sierra.bottle.tar.gz
==> Caveats
As of go 1.2, a valid GOPATH is required to use the `go get` command:
  https://golang.org/doc/code.html#GOPATH

You may wish to add the GOROOT-based install location to your PATH:
  export PATH=$PATH:/usr/local/opt/go/libexec/bin
==> Summary
🍺  /usr/local/Cellar/go/1.7.3: 6,438 files, 250.6M
==> Installing grafana/grafana/grafana
==> Downloading https://github.com/grafana/grafana/archive/v3.1.1.tar.gz
==> Downloading from https://codeload.github.com/grafana/grafana/tar.gz/v3.1.1
######################################################################## 100.0%
==> go run build.go setup
==> go run build.go build
==> npm install --verbose
==> npm install grunt-cli --verbose
==> node_modules/grunt-cli/bin/grunt build
Last 15 lines from /Users/mjbrende/Library/Logs/Homebrew/grafana/05.grunt:
  42:3  warning  Declarations should come before nestings  declarations-before-nesting
  43:3  warning  Declarations should come before nestings  declarations-before-nesting
  44:3  warning  Declarations should come before nestings  declarations-before-nesting
  45:3  warning  Declarations should come before nestings  declarations-before-nesting
  46:3  warning  Declarations should come before nestings  declarations-before-nesting
  47:3  warning  Declarations should come before nestings  declarations-before-nesting

public/sass/components/_tabbed_view.scss
  44:3  warning  Declarations should come before nestings  declarations-before-nesting

✖ 10 problems (1 error, 9 warnings)

Warning:  Use --force to continue.

Aborted due to warnings.

If reporting this issue please do so at (not Homebrew/brew or Homebrew/core):
https://github.com/grafana/homebrew-grafana/issues

These open issues may also help:
brew install  grafana error  https://github.com/grafana/homebrew-grafana/issues/5
brew install grafana/grafana/grafana fails with error https://github.com/grafana/homebrew-grafana/issues/1
homebrew of grafana fails https://github.com/grafana/homebrew-grafana/issues/6
Web Interface for Grafana not loaded https://github.com/grafana/homebrew-grafana/issues/4

Looks like brew did not install over my existing instance:

$ grafana-server -v
Version 3.0.4

Nothing urgent here - I will setup from source.