Linux build

Fix appveyor build #1505

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Run time

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Job	Run time
Linux -> Pre-checks	21s
Linux -> Clang-x64, Debug	13m 1s
Linux -> GCC-x64, Debug	13m 10s
Linux -> GCC-x64, Release	11m 2s
Linux -> Clang-x64, Release	13m 50s
	51m 24s