Fails like this: gcc.archive ..\..\..\bin.v2\libs\system\build\gcc-4.8.3\release\link-static\libboost_system-gcc48-1_58.a The system cannot find the path specified. The system cannot find the path specified. "/usr/i686-pc-cygwin/bin/ar.exe" rc "..\..\..\bin.v2\libs\system\build\gcc-4.8.3\release\link-static\libboost_system-gcc48-1_58.a" "..\..\..\bin.v2\libs\system\build\gcc-4.8.3\release\link-static\error_code.o" "/usr/i686-pc-cygwin/bin/ranlib.exe" "..\..\..\bin.v2\libs\system\build\gcc-4.8.3\release\link-static\libboost_system-gcc48-1_58.a" ...failed gcc.archive ..\..\..\bin.v2\libs\system\build\gcc-4.8.3\release\link-static\libboost_system-gcc48-1_58.a...