diff --git a/Makefile b/Makefile
index cd14e6f68b4..65d9b208827 100644
--- a/Makefile
+++ b/Makefile
@@ -120,9 +120,6 @@ promote: $(BIN)
 .PHONY: accept-corrections
 accept-corrections: promote
 
-all-supported-ocaml-versions: $(BIN)
-	$(BIN) build @install @runtest --workspace dune-workspace.dev --root .
-
 .PHONY: clean
 clean:
 	rm -rf _boot _build
diff --git a/dune-workspace.dev b/dune-workspace.dev
deleted file mode 100644
index fe034d49ebd..00000000000
--- a/dune-workspace.dev
+++ /dev/null
@@ -1,6 +0,0 @@
-(lang dune 1.0)
-
-;; This file is used by `make all-supported-ocaml-versions`
-(context (opam (switch 4.08.1)))
-(context (opam (switch 4.09.0)))
-(context (opam (switch 4.10.0)))