DVT SystemVerilog IDE User Guide
Rev. 19.1.12, 19 April 2019

42.46 How to change the directory where the build log file is saved ?

Open the active .build file under the .dvt diredctory (e.g. .dvt/default.build) and add these flags:

+dvt_build_log_to_file+true/false

+dvt_build_log_file_location+path/to/folder (use "." for project's root)