update Makefile

Makefile

@@ -1,15 +1,22 @@
 HOST ?= $(shell hostname)
 HOSTS = solo c2
 
-_all:
-	@true
-.PHONY: _all $(addprefix, _swtich_,${HOSTS}) _swtich_
+.PHONY: all switch $(addprefix, _swtich_,${HOSTS}) _swtich_
 .SUFFIXES:
 
+all:
+	@echo "Run \`make switch\` as root to rebuild and switch"
+	@true
+
 switch: _switch_${HOST}
 
 _switch_:
 	@echo "ERROR: couldn't find hostname"
 	@false
 _switch_%:
+	@if [ "$(shell whoami)" != "root" ]; then \
+		echo "ERROR: Run as root!"; \
+		false; \
+	fi
 	nixos-rebuild switch --flake .#$*
+