The Copy Build Command button in the build configuration details tooltip allows you to copy the exact build command invocation as a command line string.
There was a small bug with this string that made it show a prompt for picking the build configuration, even though the build configuration should have been inferred from context.
Additionally, the build configuration would print with backslashes as path separators on Windows, which did not evaluate correctly on the command line for all terminals. The extension now writes the paths with forward slashes on all platforms.