1 files changed, 10 insertions, 1 deletions

diff --git a/flake.nix b/flake.nix
index 7cc04fd..97e364f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,8 +20,16 @@
           materializedDefsToScope
           materializeOpamProject';
         package = "wormhole";
+        devPackagesQuery = {
+          ocaml-lsp-server = "*";
+          ocamlformat = "*";
+          # 1.9.6 fails to build
+          ocamlfind = "1.9.5";
+          utop = "*";
+        };
         query = {
           ocaml-base-compiler = "*";
+          ocamlformat = "*";
         };
         overlay = final: prev: {
           "${package}" = prev.${package}.overrideAttrs (_: {
@@ -33,6 +41,7 @@
             ];
           });
         };
+        devBuildInputs = [ pkgs.ocamlPackages.ocamlformat ];
         resolved-scope =
           let scope = buildOpamProject { } package ./. query;
           in scope.overrideScope' overlay;
@@ -51,7 +60,7 @@
         defaultPackage = packages.materialized.${package};
         devShells.default = pkgs.mkShell {
           inputsFrom = [ defaultPackage ];
-          buildInputs = [];
+          buildInputs = devBuildInputs;
         };
       }
     );