diff --git a/makefile b/makefile
new file mode 100644
index 0000000..979aac7
--- /dev/null
+++ b/makefile
@@ -0,0 +1,17 @@
+# -*- mode: makefile-gmake; -*-
+ifeq ($(shell $(MAKE) -v | grep GNU),)
+  $(error I need gnumake not bsdmake)
+endif
+REQUIRED_V := 3.82
+ifneq ($(REQUIRED_V),$(firstword $(sort $(MAKE_VERSION) $(REQUIRED_V))))
+  $(error For .ONESHELL to work I need at least version $(REQUIRED_V))
+endif
+
+.ONESHELL:
+
+switch:
+	sudo nixos-rebuild switch --flake .
+
+upgrade:
+	sudo nix-channel --update
+	nix flake update