diff --git a/Makefile b/Makefile
index b3b0b28..35ddd58 100644
--- a/Makefile
+++ b/Makefile
@@ -37,26 +37,26 @@ aws: conf_dir
 		lib/mdev/nvme-ebs-links
 	install -Dm644 -t "$(PREFIX)"/lib/tiny-cloud/aws \
 		lib/tiny-cloud/aws/*
-	sed -e 's/^#?CLOUD=.*/CLOUD=aws/' \
-		-e 's/^#?HOTPLUG_MODULES=.*/HOTPLUG_MODULES="vnic_eth_hotplug nvme_ebs_links"/' \
+	sed -Ee 's/^#?CLOUD=.*/CLOUD=aws/' \
+		-Ee 's/^#?HOTPLUG_MODULES=.*/HOTPLUG_MODULES="vnic_eth_hotplug nvme_ebs_links"/' \
 		etc/conf.d/tiny-cloud.example > "$(PREFIX)"/etc/conf.d/tiny-cloud
 
 azure: conf_dir
 	install -Dm644 -t $(PREFIX)/lib/tiny-cloud/azure \
 		lib/tiny-cloud/azure/*
-	sed -e 's/^#?CLOUD=.*/CLOUD=azure/' \
+	sed -Ee 's/^#?CLOUD=.*/CLOUD=azure/' \
 		etc/conf.d/tiny-cloud.example > "$(PREFIX)"/etc/conf.d/tiny-cloud
 
 gcp: conf_dir
 	install -Dm644 -t $(PREFIX)/lib/tiny-cloud/gcp \
 		lib/tiny-cloud/gcp/*
-	sed -e 's/^#?CLOUD=.*/CLOUD=gcp/' \
+	sed -Ee 's/^#?CLOUD=.*/CLOUD=gcp/' \
 		etc/conf.d/tiny-cloud.example > "$(PREFIX)"/etc/conf.d/tiny-cloud
 
 oci: conf_dir
 	install -Dm644 -t $(PREFIX)/lib/tiny-cloud/oci \
 		lib/tiny-cloud/oci/*
-	sed -e 's/^#?CLOUD=.*/CLOUD=oci/' \
+	sed -Ee 's/^#?CLOUD=.*/CLOUD=oci/' \
 		etc/conf.d/tiny-cloud.example > "$(PREFIX)"/etc/conf.d/tiny-cloud
 
 conf_dir: