x1c in /home/nrb/go/src/github.com/heptio/ark (git) master
% dep ensure
ensure Solve(): No versions of k8s.io/kubernetes met constraints:
        v1.9.0: unable to update checked out version: : command failed: [git checkout 925c127ec6b946659ad0fd596fa959be43f0cc05]: exit status 1
        v1.9.3: unable to update checked out version: : command failed: [git checkout d2835416544f298c919e2ead3be3d0864b52323b]: exit status 1
        v1.9.2: unable to update checked out version: : command failed: [git checkout 5fa2db2bd46ac79e5e00a4e6ed24191080aa463b]: exit status 1
        v1.9.1: unable to update checked out version: : command failed: [git checkout 3a1c9449a956b6026f075fa3134ff92f7d55f812]: exit status 1
        v1.8.8: Could not introduce k8s.io/kubernetes@v1.8.8, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.7: Could not introduce k8s.io/kubernetes@v1.8.7, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.6: Could not introduce k8s.io/kubernetes@v1.8.6, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.5: Could not introduce k8s.io/kubernetes@v1.8.5, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.4: Could not introduce k8s.io/kubernetes@v1.8.4, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.3: Could not introduce k8s.io/kubernetes@v1.8.3, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.2: Could not introduce k8s.io/kubernetes@v1.8.2, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.1: Could not introduce k8s.io/kubernetes@v1.8.1, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.8.0: Could not introduce k8s.io/kubernetes@v1.8.0, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.7.13: Could not introduce k8s.io/kubernetes@v1.7.13, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.
        v1.7.12: Could not introduce k8s.io/kubernetes@v1.7.12, as it is not allowed by constraint ~1.9.0 from project github.com/heptio/ark.