Specify trusty image (#2485)
Specify trusty image (#2485)


dask/dask,ContinuumIO/dask,jakirkham/dask,jakirkham/dask,jcrist/dask,blaze/dask,mrocklin/dask,jcrist/dask,ContinuumIO/dask,dask/dask,blaze/dask,mrocklin/dask