Massimiliano Culpo 19c5843871 Travis: change the spec we concretize on MacOS (#16256) ... Since CMake can't build with GCC on MacOS, choose a spec that doesn't have CMake in the DAG.		2020-04-23 11:40:23 +02:00
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spack	Travis: change the spec we concretize on MacOS (#16256)	2020-04-23 11:40:23 +02:00