Issue updating to 0.12.2

[onaforeignshore]

I tried to update and it failed with the following:

==> Upgrading 1 outdated package, with result:
go-delve/delve/delve 0.12.2
==> Upgrading go-delve/delve/delve
==> Downloading https://github.com/derekparker/delve/archive/v0.12.2.tar.gz
==> Downloading from https://codeload.github.com/derekparker/delve/tar.gz/v0.12.2
######################################################################## 100.0%
==> dlv-cert is already installed, no need to create it
==> make build BUILD_SHA=v0.12.2
Last 15 lines from /Users/chris/Library/Logs/Homebrew/delve/01.make:
2017-04-13 23:08:02 +0400

make
build
BUILD_SHA=v0.12.2

go build -ldflags="-s -X main.Build=v0.12.2" github.com/derekparker/delve/cmd/dlv
codesign -s "dlv-cert"  ./dlv
dlv-cert: no identity found
make: *** [build] Error 1

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