$ spack setup icebin@develop+gridgen+python+everytrace+coupler+pism \
>     ^ibmisc@develop+everytrace+proj+blitz+netcdf+boost+udunits2+python \
>     ^pism@dev+icebin
Traceback (most recent call last):
  File "/home2/rpfische/spack4/bin/spack", line 203, in <module>
    main()
  File "/home2/rpfische/spack4/bin/spack", line 180, in main
    return_val = command(parser, args)
  File "/home2/rpfische/spack4/lib/spack/spack/cmd/setup.py", line 186, in setup
    install.install(parser, inst_args)
  File "/home2/rpfische/spack4/lib/spack/spack/cmd/install.py", line 313, in install
    specs = spack.cmd.parse_specs(args.package, concretize=True)
  File "/home2/rpfische/spack4/lib/spack/spack/cmd/__init__.py", line 108, in parse_specs
    spec.concretize()  # implies normalize
  File "/home2/rpfische/spack4/lib/spack/spack/spec.py", line 1329, in concretize
    changes = (self.normalize(force),
  File "/home2/rpfische/spack4/lib/spack/spack/spec.py", line 1621, in normalize
    copy=False, deptype_query=alldeps)
  File "/home2/rpfische/spack4/lib/spack/spack/spec.py", line 1413, in flat_dependencies_with_deptype
    flat_deps[spec.name].spec.constrain(spec)
  File "/home2/rpfische/spack4/lib/spack/spack/spec.py", line 1737, in constrain
    changed |= self._constrain_dependencies(other)
  File "/home2/rpfische/spack4/lib/spack/spack/spec.py", line 1761, in _constrain_dependencies
    dep_spec_copy = other.get_dependency(name)
  File "/home2/rpfische/spack4/lib/spack/spack/spec.py", line 614, in get_dependency
    raise InvalidDependencyException(
NameError: global name 'InvalidDependencyException' is not defined