Handle bash-less environments #50

Job	Run time
Linux build (openblas)	5m 0s
Linux build (mkl)	7m 30s
Linux build (openblas / static)	6m 54s
Mac build (accelerate / static)	3m 56s
Mac build (accelerate)	3m 2s
Windows build (mkl)	5m 45s
Windows build (openblas)	4m 29s
Windows build openblas installed (mkl)	4m 50s
	41m 26s

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