What is %cd% in build log? (Linux.)
I can't tell what platform you're using. 'C:' in path points to Windows. '/usr/bin/sh' in commands points to Linux/Unix/OS X. What is it?
Are you using MX stand alone or as an Eclipse plugin?
What versions of MS and Workbench are you using?
With up to date versions of the S/W I am building (mostly) without difficulty on Linux. I'm using MX 4.19 and Workbench installed on Eclipse Neon.2.