diff --git a/debian/rules b/debian/rules
index 9ea1c59..9eb7657 100755
--- a/debian/rules
+++ b/debian/rules
@@ -40,7 +40,7 @@ override_dh_install:
 	dh_install --fail-missing
 
 override_dh_gencontrol:
-ifneq ($(shell grep -o 'stretch\|buster' /etc/debian_version),)
+ifneq ($(shell grep -o '^9\|^10' /etc/debian_version),)
 	echo "pythonver:Depends=python" >> debian/qubes-core-agent-nautilus.substvars
 else
 	echo "pythonver:Depends=python3" >> debian/qubes-core-agent-nautilus.substvars