diff --git a/make/nginx.mk b/make/nginx.mk
index b8b558a..16510a6 100644
--- a/make/nginx.mk
+++ b/make/nginx.mk
@@ -23,7 +23,7 @@ endef
 define uninstall_nginx_module_rule =
 .PHONY: uninstall_nginx_$(module)
 uninstall_nginx_$(module):
-	(if $(SUBDOMAIN_$(module)),rm -f /etc/nginx/http.d/$(SUBDOMAIN_$(module)).joeac.net.conf)
+	$(if $(SUBDOMAIN_$(module)),rm -f /etc/nginx/http.d/$(SUBDOMAIN_$(module)).joeac.net.conf)
 endef
 
 define remove_nginx_site_rule =
diff --git a/make/vars.mk b/make/vars.mk
index 2033a06..6ab3af4 100644
--- a/make/vars.mk
+++ b/make/vars.mk
@@ -1,4 +1,4 @@
-capitalise = $(shell _v="$(1)"; echo $${_v^^})
+capitalise = $(shell echo "$(1)" | tr '[:lower:]' '[:upper:]')
 
 USER := $(shell whoami)
 HOSTNAME := $(shell cat /etc/hostname)