Result: `make test` works:
```
$ #### BUILD ####
$ make WHAT="./cmd/kubectl/ ./staging/src/k8s.io/api"
+++ [1211 11:20:46] Building go targets for linux/amd64
./cmd/kubectl/ (non-static)
./staging/src/k8s.io/api (non-static)
$ #### TEST ####
$ make test WHAT=./pkg/proxy/iptables/
+++ [1211 11:22:31] Set GOMAXPROCS automatically to 6
+++ [1211 11:22:31] Running tests without code coverage and with -race
ok k8s.io/kubernetes/pkg/proxy/iptables 9.517s
$ make test WHAT=pkg/proxy/iptables/
+++ [1211 11:22:53] Set GOMAXPROCS automatically to 6
+++ [1211 11:22:53] Running tests without code coverage and with -race
ok k8s.io/kubernetes/pkg/proxy/iptables (cached)
$ make test WHAT=k8s.io/kubernetes/pkg/proxy/iptables/
+++ [1211 11:23:09] Set GOMAXPROCS automatically to 6
+++ [1211 11:23:09] Running tests without code coverage and with -race
ok k8s.io/kubernetes/pkg/proxy/iptables (cached)
$ make test WHAT=./staging/src/k8s.io/api
+++ [1211 11:23:24] Set GOMAXPROCS automatically to 6
+++ [1211 11:23:24] Running tests without code coverage and with -race
ok k8s.io/api 21.981s
$ make test WHAT=staging/src/k8s.io/api
+++ [1211 11:23:54] Set GOMAXPROCS automatically to 6
+++ [1211 11:23:54] Running tests without code coverage and with -race
ok k8s.io/api (cached)
$ make test WHAT=k8s.io/api
+++ [1211 11:24:06] Set GOMAXPROCS automatically to 6
+++ [1211 11:24:06] Running tests without code coverage and with -race
ok k8s.io/api (cached)
```
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