Merge pull request #200 from tgross35/patch-1

Change `--build` to use an absolute path

Author: tgross35

src/lib.rs

@@ -846,7 +846,7 @@ impl Config {
             }
         }
 
-        cmd.arg("--build").arg(".");
+        cmd.arg("--build").arg(&build);
 
         if !self.no_build_target {
             let target = self