diff --git a/postinst.d/10-nvidia-drivers b/postinst.d/10-nvidia-drivers
index 1822186..41ec1f0 100755
--- a/postinst.d/10-nvidia-drivers
+++ b/postinst.d/10-nvidia-drivers
@@ -1,3 +1,8 @@
 #!/usr/bin/env sh
+
+[ -e "$0.disabled" ] && exit 0
+which make >/dev/null 2>&1 || exit 0
+[ -d "/usr/src/nvidia-drivers" ] || exit 0
+
 echo Build NVIDIA module... >&2
 exec make -C /usr/src/nvidia-drivers SYSSRC="/lib/modules/$1/build" install
diff --git a/postinst.d/90-dracut b/postinst.d/90-dracut
index edf8127..ef2bfe9 100755
--- a/postinst.d/90-dracut
+++ b/postinst.d/90-dracut
@@ -1,3 +1,7 @@
 #!/usr/bin/env sh
+
+[ -e "$0.disabled" ] && exit 0
+which dracut >/dev/null 2>&1 || exit 0
+
 echo "dracut..." >&2
 exec dracut --force --kver "$1"
diff --git a/postinst.d/zz-grub-mkconfig b/postinst.d/zz-grub-mkconfig
index 47a9558..9ee6f7c 100755
--- a/postinst.d/zz-grub-mkconfig
+++ b/postinst.d/zz-grub-mkconfig
@@ -1,3 +1,6 @@
 #!/usr/bin/env sh
-echo "grub-mkconfig..." >&2
+
+[ -e "$0.disabled" ] && exit 0
+which grub-mkconfig >/dev/null 2>&1 || exit 0
+
 exec grub-mkconfig -o /boot/grub/grub.cfg