nixfmt-rfc-style

There is nothing in this commit except for the changes made by
nix-shell -p nixfmt-rfc-style --run "nixfmt ."

If this has mucked up your open branches then sorry about that. You
can probably nixfmt them to match before merging

pkgs/libubootenv/default.nix

@@ -13,6 +13,9 @@ stdenv.mkDerivation {
     rev = "3f4d15e36ceb58085b08dd13f3f2788e9299877b"; # v0.3.5
     hash = "sha256-i7gUb1A6FTOBCpympQpndhOG9pCDA4P0iH7ZNBqo+PA=";
   };
-  buildInputs = [ zlib libyaml ];
+  buildInputs = [
+    zlib
+    libyaml
+  ];
   nativeBuildInputs = [ cmake ];
 }