diff --git a/features.in/install2/config.mk b/features.in/install2/config.mk
index 67b0d731..4b30d162 100644
--- a/features.in/install2/config.mk
+++ b/features.in/install2/config.mk
@@ -34,7 +34,7 @@ use/install2/kvm:
 
 # virtualbox guest support for installer
 use/install2/vbox:
-	@$(call add,STAGE1_KMODULES,virtualbox-addition)
+	@$(call add,STAGE1_KMODULES,virtualbox-addition vboxguest)
 
 # filesystems handling
 use/install2/fs: use/install2/xfs use/install2/jfs use/install2/reiserfs; @:
diff --git a/features.in/sound/config.mk b/features.in/sound/config.mk
index 40a88707..a3edddbe 100644
--- a/features.in/sound/config.mk
+++ b/features.in/sound/config.mk
@@ -3,7 +3,7 @@
 # "bare" ALSA (which is good enough for many of us) with persistent levels
 use/sound:
 	@$(call add_feature)
-	@$(call add,THE_KMODULES,alsa)
+	@$(call add,THE_KMODULES,alsa sound)
 	@$(call add,THE_PACKAGES,amixer alsa-utils aplay udev-alsa)
 
 # PulseAudio (useful for per-app levels, dynamic devices and networked sound)
diff --git a/features.in/vmguest/config.mk b/features.in/vmguest/config.mk
index 67457573..1aa1112f 100644
--- a/features.in/vmguest/config.mk
+++ b/features.in/vmguest/config.mk
@@ -4,7 +4,7 @@ use/vmguest:
 	@$(call add_feature)
 
 use/vmguest/virtualbox: use/vmguest
-	@$(call add,THE_KMODULES,virtualbox-addition drm)
+	@$(call add,THE_KMODULES,virtualbox-addition vboxguest drm)
 	@$(call add,THE_PACKAGES,virtualbox-guest-additions)
 
 # NB: only reasonable for X11-bearing images