diff --git a/Makefile b/Makefile
index 248c4bf3..e43ced69 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ deb: $(foreach c,$(CRATES), $c-deb)
 
 .PHONY: check
 check:
-	cargo fmt -- --check
+	cargo +nightly fmt -- --check
 	cargo test
 
 # Run the api-test server, serving the api-test/www/ subdir as 'www' dir over
diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index 2bf5ad04..00000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-stable