Exclude windows on go get

gh_task.go

@@ -48,11 +48,13 @@ func TaskCrossCompile(t *tasking.T) {
 	}
 
 	// TODO: use a dependency manager that has versioning
-	t.Log("Updating dependencies...")
-	err = t.Exec("go get -u ./...")
-	if err != nil {
-		t.Errorf("Can't update goxc: %s\n", err)
-		return
+	if runtime.GOOS != "windows" {
+		t.Log("Updating dependencies...")
+		err = t.Exec("go get -u ./...")
+		if err != nil {
+			t.Errorf("Can't update goxc: %s\n", err)
+			return
+		}
 	}
 
 	t.Logf("Cross-compiling gh for %s...\n", runtime.GOOS)