diff --git a/flake.nix b/flake.nix
index 57bf7a811..11843d492 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,6 +14,7 @@
     in pkgs.mkShell {
       buildInputs = with pkgs; [
         elixir
+        rebar3
         cmake
         imagemagick
       ];