diff --git a/GNUmakefile b/GNUmakefile
new file mode 100644
index 000000000000..38656c8df542
--- /dev/null
+++ b/GNUmakefile
@@ -0,0 +1,14 @@
+# This Makefile is used as a shim to aid people with muscle memory
+# so that they can type "make".
+#
+# This file and all of its targets should not be used by anything important.
+
+all: build
+
+build:
+	./mach build
+
+clean:
+	./mach clobber
+
+.PHONY: all build clean