try to fix a build error for non-vulkan feature configurations
use std::path::PathBuf;
-use crate::artifact::{DrawingDriver, OpenGL, Vulkan, CPU};
+use crate::artifact::{DrawingDriver, OpenGL, CPU};
use clap::{App, Arg};
use offscreen_gl_context::{GLContext, NativeGLContext, GLVersion};
use gleam;
-
+#[cfg(feature="vulkan")]
+use crate::artifact::{Vulkan};
extern crate skia_safe;
#[macro_use]
