What steps will reproduce the problem?

1. Set GOPATH variable different from GOROOT
2. Goinstall external package (from github/launcpad etc..)
3. Import external package inside project
4. Compile project using godag

What is the expected output? What do you see instead?

Expected project to compile, it does not. Packages in GOPATH are not found by compiler (gc), unless GOPATH == GOROOT.

works for backend gc [8g,6g,5g], not for gccgo yet