fix(profile): temporary allow environment in profile transition.

Turn out this is the actual source of issues #80 #235:
- Some programs do not start well with scrub the environment
- Not related to dbus (but dbus was affected)
- May concern a lot of profiles

As a temporary solution, we convert all Px in px while we find out a proper solution.

pkg/prebuild/prebuild.go

@@ -28,6 +28,7 @@ func init() {
 
 	// Build tasks applied by default
 	builder.Register("userspace")
+	builder.Register("dev")
 
 	switch cfg.Distribution {
 	case "ubuntu":