GOPATH does not resolve Eclipse path variables like ${PROJECT_LOC}

[AlskiOnTheWeb]

If you modify a project's Go settings and add a path element with an embedded Eclipse path variable such as ${PROJECT_LOC}, the values passed to go should be fully resolved but they aren't:

************ Building Go project: cgp.common.lib.go.mgmt ************
with GOPATH: ${PROJECT_LOC}/target/generated-sources/swagger;C:\Users\amarcinkowski\repositories\cgp\common\lib\src\go\mgmt

Running: C:\Go\bin\go.exe install -v -gcflags "-N -l" main/go
go: GOPATH entry is relative; must be absolute path: "${PROJECT_LOC}/target/generated-sources/swagger".
Run 'go help gopath' for usage.
^^^ Terminated, exit code: 2 ^^^
************ Build terminated. ************